The Experts below are selected from a list of 22290 Experts worldwide ranked by ideXlab platform
Shigang Kang - One of the best experts on this subject based on the ideXlab platform.
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Study on hydro-liquefaction kinetics of thermal dissolution soluble fraction from Shenfu Sub-Bituminous Coal
Fuel, 2017Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Shibiao Ren, Chunxiu Pan, Yan Zhou, Tao Shui, Shigang KangAbstract:Abstract Thermal dissolution (TD) of Coal and hydro-liquefaction of the thermal dissolution soluble fraction (TDSF) with a high activity catalyst is one of effective high efficient hydro-liquefaction of Coal techniques. In this study, a Chinese Shenfu (SF) Sub-Bituminous Coal was thermally dissolved, and the TDSF obtained was further hydro-liquefied with Ni–Mo-S/Al 2 O 3 catalyst. Based on the hydro-liquefaction results, a model including series and parallel reactions was established for the hydro-liquefaction of TDSF catalyzed by Ni–Mo-S/Al 2 O 3 , and the regressive reactions were ruled out in the model. From the kinetic parameters calculated, it suggested that the regressive reactions including the char formation reactions were negligible in the hydro-liquefaction of TDSF catalyzed by Ni–Mo-S/Al 2 O 3 . The reactions of TDSF to preasphaltene and preasphaltene to oil + gas predominated the formation of oil + gas. Ni–Mo-S/Al 2 O 3 could decrease the activation energy of preasphaltene to oil + gas reaction, thus promoting the formation of oil and gas in the catalytic hydro-liquefaction of TDSF.
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Study on the Use of the Thermal Dissolution Soluble Fraction from Shenfu Sub-Bituminous Coal in Coke-Making Coal Blends
Energy & Fuels, 2015Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Shibiao Ren, Chunxiu Pan, Shigang KangAbstract:Thermal dissolution (TD) of a Chinese Shenfu Sub-Bituminous Coal (SFSBC) at different conditions was carried out, and the effects of the addition of a thermal dissolution soluble fraction (TDSF) in coke-making Coal blends on the properties of coke were evaluated in this study. The results suggested that SFSBC gave the highest thermal dissolution soluble yield (TDSY) of 61.9% in 1-methylnaphthalen (1-MN) at 360 °C. Then, the TDSY decreased to 44.8% when the TD temperature increased to 380 °C because of pyrolysis and condensation reactions of Coal taking place at this temperature. Polar solvents gave larger dissolution ability to SFSBC than nonpolar solvents. The properties of TDSFs obtained from different conditions were quite different. At the TD temperature of 320–360 °C, the TDSF in 1-MN at a higher temperature contained more −OH groups with a narrow thermoplastic temperature interval compared to that at a lower temperature. The TDSFs in polar solvents crude methyl naphthalene oil (CMNO) and 1-MN added ...
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caking and coking properties of the thermal dissolution soluble fraction of a fat Coal
Fuel Processing Technology, 2014Co-Authors: Hengfu Shui, Zhicai Wang, Tao Shui, Wenjuan Zhao, Chuanjun Shan, Shigang KangAbstract:Abstract In the Coal blending for coke-making, fat Coal has a very important role for the caking and coking properties of the Coal blends. In this study, a fat Coal was thermally dissolved, and the caking and coking properties of the thermal dissolution soluble factions (TDSFs) from different solvents and temperatures were characterized. It was found that the caking properties of TDSFs were better than that of fat raw Coal. The TDSFs obtained from non-polar solvents have a higher caking property than those obtained from polar solvents at the same thermal dissolution (TD) temperature. During TD process, polar solvents can thermally dissolve more polyaromatic compounds into TDSF, thus increasing the softening temperature and decreasing the caking property of the TDSF. For the same TD solvent, the TDSFs obtained from higher temperatures have a lower caking property compared to those obtained from lower temperatures because of more aromatic components and oxygen functional groups entering them. Crucible coking determinations were carried out to evaluate the coking property of the TDSFs. The result suggests that when 5% of TDSF and 5% of non-caking Sub-Bituminous Coal were used instead of the same amount of fat Coal and gas Coal, respectively in the Coal blends, the quality of the coke obtained could get to the level of the coke obtained from the standard Coal blends (i.e. without TDSF and Sub-Bituminous Coal). Therefore, the use of TDSF in Coal blending for coke-making is one of the effective methods for opening the coking Coal resources.
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Hydrothermal Treatment of a Sub-Bituminous Coal and Its Use in Coking Blends
Energy & Fuels, 2012Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Changhui Lin, Shibiao Ren, Chunxiu Pan, Shigang KangAbstract:The demand for metallurgical coke for blast furnaces is forcing the coke-making industry to look for new sources of coking Coals. Noncoking Coals are attractive for use in the coke-making Coal blends, because they are cheaper and more available. In this study, a Chinese Sub-Bituminous Coal with noncaking property was hydrothermally treated in order to modify its caking and coking properties to be used in coke-making Coal blends as much as possible. The caking and coking properties of the hydrothermally treated Coals were characterized by solvent extraction, caking index (GRI) measurement, and crucible coking determination. The results show that the solvent extraction yield and GRI of the Sub-Bituminous Coal can be greatly increased by hydrothermal treatment at proper conditions and the removal of oxygen functional groups, especially the hydroxyl group, thus dissociating the aggregated structure of Coal is responsible for the modification results. Crucible coking determinations suggest that hydrothermal tr...
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Modification of a Sub-Bituminous Coal by Hydrothermal Treatment with the Addition of CaO: Extraction and Caking Properties
Energy & Fuels, 2012Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Changhui Lin, Shibiao Ren, Xiangyu Zhang, Shigang KangAbstract:A Chinese Sub-Bituminous Coal, i.e., Shengfu (SF) Coal, was hydrothermally treated with and without CaO addition at different temperatures, and the extraction yields and caking indexes (GRI) of the treated Coals were measured. The action of CaO during hydrothermal treatment was probed in this study. The results show that hydrothermal treatment can obviously increase the extraction yield and GRI of SF Coal, and CaO can further promote this effect of hydrothermal treatment. The removal of oxygen functional groups, especially the hydroxyl group, dissociating the aggregated structure of Coal, is responsible for the modifying results. CaO can supply a basic environment for the hydrothermal treatment, which is beneficial for the removal of acidic oxygen functional groups by acid–base interactions and promotes the effect of hydrothermal treatment for SF Coal, resulting in additional increases in the extraction yield and GRI.
Hengfu Shui - One of the best experts on this subject based on the ideXlab platform.
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Study on hydro-liquefaction kinetics of thermal dissolution soluble fraction from Shenfu Sub-Bituminous Coal
Fuel, 2017Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Shibiao Ren, Chunxiu Pan, Yan Zhou, Tao Shui, Shigang KangAbstract:Abstract Thermal dissolution (TD) of Coal and hydro-liquefaction of the thermal dissolution soluble fraction (TDSF) with a high activity catalyst is one of effective high efficient hydro-liquefaction of Coal techniques. In this study, a Chinese Shenfu (SF) Sub-Bituminous Coal was thermally dissolved, and the TDSF obtained was further hydro-liquefied with Ni–Mo-S/Al 2 O 3 catalyst. Based on the hydro-liquefaction results, a model including series and parallel reactions was established for the hydro-liquefaction of TDSF catalyzed by Ni–Mo-S/Al 2 O 3 , and the regressive reactions were ruled out in the model. From the kinetic parameters calculated, it suggested that the regressive reactions including the char formation reactions were negligible in the hydro-liquefaction of TDSF catalyzed by Ni–Mo-S/Al 2 O 3 . The reactions of TDSF to preasphaltene and preasphaltene to oil + gas predominated the formation of oil + gas. Ni–Mo-S/Al 2 O 3 could decrease the activation energy of preasphaltene to oil + gas reaction, thus promoting the formation of oil and gas in the catalytic hydro-liquefaction of TDSF.
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Study on the Use of the Thermal Dissolution Soluble Fraction from Shenfu Sub-Bituminous Coal in Coke-Making Coal Blends
Energy & Fuels, 2015Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Shibiao Ren, Chunxiu Pan, Shigang KangAbstract:Thermal dissolution (TD) of a Chinese Shenfu Sub-Bituminous Coal (SFSBC) at different conditions was carried out, and the effects of the addition of a thermal dissolution soluble fraction (TDSF) in coke-making Coal blends on the properties of coke were evaluated in this study. The results suggested that SFSBC gave the highest thermal dissolution soluble yield (TDSY) of 61.9% in 1-methylnaphthalen (1-MN) at 360 °C. Then, the TDSY decreased to 44.8% when the TD temperature increased to 380 °C because of pyrolysis and condensation reactions of Coal taking place at this temperature. Polar solvents gave larger dissolution ability to SFSBC than nonpolar solvents. The properties of TDSFs obtained from different conditions were quite different. At the TD temperature of 320–360 °C, the TDSF in 1-MN at a higher temperature contained more −OH groups with a narrow thermoplastic temperature interval compared to that at a lower temperature. The TDSFs in polar solvents crude methyl naphthalene oil (CMNO) and 1-MN added ...
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caking and coking properties of the thermal dissolution soluble fraction of a fat Coal
Fuel Processing Technology, 2014Co-Authors: Hengfu Shui, Zhicai Wang, Tao Shui, Wenjuan Zhao, Chuanjun Shan, Shigang KangAbstract:Abstract In the Coal blending for coke-making, fat Coal has a very important role for the caking and coking properties of the Coal blends. In this study, a fat Coal was thermally dissolved, and the caking and coking properties of the thermal dissolution soluble factions (TDSFs) from different solvents and temperatures were characterized. It was found that the caking properties of TDSFs were better than that of fat raw Coal. The TDSFs obtained from non-polar solvents have a higher caking property than those obtained from polar solvents at the same thermal dissolution (TD) temperature. During TD process, polar solvents can thermally dissolve more polyaromatic compounds into TDSF, thus increasing the softening temperature and decreasing the caking property of the TDSF. For the same TD solvent, the TDSFs obtained from higher temperatures have a lower caking property compared to those obtained from lower temperatures because of more aromatic components and oxygen functional groups entering them. Crucible coking determinations were carried out to evaluate the coking property of the TDSFs. The result suggests that when 5% of TDSF and 5% of non-caking Sub-Bituminous Coal were used instead of the same amount of fat Coal and gas Coal, respectively in the Coal blends, the quality of the coke obtained could get to the level of the coke obtained from the standard Coal blends (i.e. without TDSF and Sub-Bituminous Coal). Therefore, the use of TDSF in Coal blending for coke-making is one of the effective methods for opening the coking Coal resources.
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Hydrothermal Treatment of a Sub-Bituminous Coal and Its Use in Coking Blends
Energy & Fuels, 2012Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Changhui Lin, Shibiao Ren, Chunxiu Pan, Shigang KangAbstract:The demand for metallurgical coke for blast furnaces is forcing the coke-making industry to look for new sources of coking Coals. Noncoking Coals are attractive for use in the coke-making Coal blends, because they are cheaper and more available. In this study, a Chinese Sub-Bituminous Coal with noncaking property was hydrothermally treated in order to modify its caking and coking properties to be used in coke-making Coal blends as much as possible. The caking and coking properties of the hydrothermally treated Coals were characterized by solvent extraction, caking index (GRI) measurement, and crucible coking determination. The results show that the solvent extraction yield and GRI of the Sub-Bituminous Coal can be greatly increased by hydrothermal treatment at proper conditions and the removal of oxygen functional groups, especially the hydroxyl group, thus dissociating the aggregated structure of Coal is responsible for the modification results. Crucible coking determinations suggest that hydrothermal tr...
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Modification of a Sub-Bituminous Coal by Hydrothermal Treatment with the Addition of CaO: Extraction and Caking Properties
Energy & Fuels, 2012Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Changhui Lin, Shibiao Ren, Xiangyu Zhang, Shigang KangAbstract:A Chinese Sub-Bituminous Coal, i.e., Shengfu (SF) Coal, was hydrothermally treated with and without CaO addition at different temperatures, and the extraction yields and caking indexes (GRI) of the treated Coals were measured. The action of CaO during hydrothermal treatment was probed in this study. The results show that hydrothermal treatment can obviously increase the extraction yield and GRI of SF Coal, and CaO can further promote this effect of hydrothermal treatment. The removal of oxygen functional groups, especially the hydroxyl group, dissociating the aggregated structure of Coal, is responsible for the modifying results. CaO can supply a basic environment for the hydrothermal treatment, which is beneficial for the removal of acidic oxygen functional groups by acid–base interactions and promotes the effect of hydrothermal treatment for SF Coal, resulting in additional increases in the extraction yield and GRI.
Zhicai Wang - One of the best experts on this subject based on the ideXlab platform.
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Study on hydro-liquefaction kinetics of thermal dissolution soluble fraction from Shenfu Sub-Bituminous Coal
Fuel, 2017Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Shibiao Ren, Chunxiu Pan, Yan Zhou, Tao Shui, Shigang KangAbstract:Abstract Thermal dissolution (TD) of Coal and hydro-liquefaction of the thermal dissolution soluble fraction (TDSF) with a high activity catalyst is one of effective high efficient hydro-liquefaction of Coal techniques. In this study, a Chinese Shenfu (SF) Sub-Bituminous Coal was thermally dissolved, and the TDSF obtained was further hydro-liquefied with Ni–Mo-S/Al 2 O 3 catalyst. Based on the hydro-liquefaction results, a model including series and parallel reactions was established for the hydro-liquefaction of TDSF catalyzed by Ni–Mo-S/Al 2 O 3 , and the regressive reactions were ruled out in the model. From the kinetic parameters calculated, it suggested that the regressive reactions including the char formation reactions were negligible in the hydro-liquefaction of TDSF catalyzed by Ni–Mo-S/Al 2 O 3 . The reactions of TDSF to preasphaltene and preasphaltene to oil + gas predominated the formation of oil + gas. Ni–Mo-S/Al 2 O 3 could decrease the activation energy of preasphaltene to oil + gas reaction, thus promoting the formation of oil and gas in the catalytic hydro-liquefaction of TDSF.
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Study on the Use of the Thermal Dissolution Soluble Fraction from Shenfu Sub-Bituminous Coal in Coke-Making Coal Blends
Energy & Fuels, 2015Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Shibiao Ren, Chunxiu Pan, Shigang KangAbstract:Thermal dissolution (TD) of a Chinese Shenfu Sub-Bituminous Coal (SFSBC) at different conditions was carried out, and the effects of the addition of a thermal dissolution soluble fraction (TDSF) in coke-making Coal blends on the properties of coke were evaluated in this study. The results suggested that SFSBC gave the highest thermal dissolution soluble yield (TDSY) of 61.9% in 1-methylnaphthalen (1-MN) at 360 °C. Then, the TDSY decreased to 44.8% when the TD temperature increased to 380 °C because of pyrolysis and condensation reactions of Coal taking place at this temperature. Polar solvents gave larger dissolution ability to SFSBC than nonpolar solvents. The properties of TDSFs obtained from different conditions were quite different. At the TD temperature of 320–360 °C, the TDSF in 1-MN at a higher temperature contained more −OH groups with a narrow thermoplastic temperature interval compared to that at a lower temperature. The TDSFs in polar solvents crude methyl naphthalene oil (CMNO) and 1-MN added ...
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caking and coking properties of the thermal dissolution soluble fraction of a fat Coal
Fuel Processing Technology, 2014Co-Authors: Hengfu Shui, Zhicai Wang, Tao Shui, Wenjuan Zhao, Chuanjun Shan, Shigang KangAbstract:Abstract In the Coal blending for coke-making, fat Coal has a very important role for the caking and coking properties of the Coal blends. In this study, a fat Coal was thermally dissolved, and the caking and coking properties of the thermal dissolution soluble factions (TDSFs) from different solvents and temperatures were characterized. It was found that the caking properties of TDSFs were better than that of fat raw Coal. The TDSFs obtained from non-polar solvents have a higher caking property than those obtained from polar solvents at the same thermal dissolution (TD) temperature. During TD process, polar solvents can thermally dissolve more polyaromatic compounds into TDSF, thus increasing the softening temperature and decreasing the caking property of the TDSF. For the same TD solvent, the TDSFs obtained from higher temperatures have a lower caking property compared to those obtained from lower temperatures because of more aromatic components and oxygen functional groups entering them. Crucible coking determinations were carried out to evaluate the coking property of the TDSFs. The result suggests that when 5% of TDSF and 5% of non-caking Sub-Bituminous Coal were used instead of the same amount of fat Coal and gas Coal, respectively in the Coal blends, the quality of the coke obtained could get to the level of the coke obtained from the standard Coal blends (i.e. without TDSF and Sub-Bituminous Coal). Therefore, the use of TDSF in Coal blending for coke-making is one of the effective methods for opening the coking Coal resources.
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Hydrothermal Treatment of a Sub-Bituminous Coal and Its Use in Coking Blends
Energy & Fuels, 2012Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Changhui Lin, Shibiao Ren, Chunxiu Pan, Shigang KangAbstract:The demand for metallurgical coke for blast furnaces is forcing the coke-making industry to look for new sources of coking Coals. Noncoking Coals are attractive for use in the coke-making Coal blends, because they are cheaper and more available. In this study, a Chinese Sub-Bituminous Coal with noncaking property was hydrothermally treated in order to modify its caking and coking properties to be used in coke-making Coal blends as much as possible. The caking and coking properties of the hydrothermally treated Coals were characterized by solvent extraction, caking index (GRI) measurement, and crucible coking determination. The results show that the solvent extraction yield and GRI of the Sub-Bituminous Coal can be greatly increased by hydrothermal treatment at proper conditions and the removal of oxygen functional groups, especially the hydroxyl group, thus dissociating the aggregated structure of Coal is responsible for the modification results. Crucible coking determinations suggest that hydrothermal tr...
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Modification of a Sub-Bituminous Coal by Hydrothermal Treatment with the Addition of CaO: Extraction and Caking Properties
Energy & Fuels, 2012Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Changhui Lin, Shibiao Ren, Xiangyu Zhang, Shigang KangAbstract:A Chinese Sub-Bituminous Coal, i.e., Shengfu (SF) Coal, was hydrothermally treated with and without CaO addition at different temperatures, and the extraction yields and caking indexes (GRI) of the treated Coals were measured. The action of CaO during hydrothermal treatment was probed in this study. The results show that hydrothermal treatment can obviously increase the extraction yield and GRI of SF Coal, and CaO can further promote this effect of hydrothermal treatment. The removal of oxygen functional groups, especially the hydroxyl group, dissociating the aggregated structure of Coal, is responsible for the modifying results. CaO can supply a basic environment for the hydrothermal treatment, which is beneficial for the removal of acidic oxygen functional groups by acid–base interactions and promotes the effect of hydrothermal treatment for SF Coal, resulting in additional increases in the extraction yield and GRI.
Zhiping Lei - One of the best experts on this subject based on the ideXlab platform.
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Study on hydro-liquefaction kinetics of thermal dissolution soluble fraction from Shenfu Sub-Bituminous Coal
Fuel, 2017Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Shibiao Ren, Chunxiu Pan, Yan Zhou, Tao Shui, Shigang KangAbstract:Abstract Thermal dissolution (TD) of Coal and hydro-liquefaction of the thermal dissolution soluble fraction (TDSF) with a high activity catalyst is one of effective high efficient hydro-liquefaction of Coal techniques. In this study, a Chinese Shenfu (SF) Sub-Bituminous Coal was thermally dissolved, and the TDSF obtained was further hydro-liquefied with Ni–Mo-S/Al 2 O 3 catalyst. Based on the hydro-liquefaction results, a model including series and parallel reactions was established for the hydro-liquefaction of TDSF catalyzed by Ni–Mo-S/Al 2 O 3 , and the regressive reactions were ruled out in the model. From the kinetic parameters calculated, it suggested that the regressive reactions including the char formation reactions were negligible in the hydro-liquefaction of TDSF catalyzed by Ni–Mo-S/Al 2 O 3 . The reactions of TDSF to preasphaltene and preasphaltene to oil + gas predominated the formation of oil + gas. Ni–Mo-S/Al 2 O 3 could decrease the activation energy of preasphaltene to oil + gas reaction, thus promoting the formation of oil and gas in the catalytic hydro-liquefaction of TDSF.
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Study on the Use of the Thermal Dissolution Soluble Fraction from Shenfu Sub-Bituminous Coal in Coke-Making Coal Blends
Energy & Fuels, 2015Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Shibiao Ren, Chunxiu Pan, Shigang KangAbstract:Thermal dissolution (TD) of a Chinese Shenfu Sub-Bituminous Coal (SFSBC) at different conditions was carried out, and the effects of the addition of a thermal dissolution soluble fraction (TDSF) in coke-making Coal blends on the properties of coke were evaluated in this study. The results suggested that SFSBC gave the highest thermal dissolution soluble yield (TDSY) of 61.9% in 1-methylnaphthalen (1-MN) at 360 °C. Then, the TDSY decreased to 44.8% when the TD temperature increased to 380 °C because of pyrolysis and condensation reactions of Coal taking place at this temperature. Polar solvents gave larger dissolution ability to SFSBC than nonpolar solvents. The properties of TDSFs obtained from different conditions were quite different. At the TD temperature of 320–360 °C, the TDSF in 1-MN at a higher temperature contained more −OH groups with a narrow thermoplastic temperature interval compared to that at a lower temperature. The TDSFs in polar solvents crude methyl naphthalene oil (CMNO) and 1-MN added ...
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Hydrothermal Treatment of a Sub-Bituminous Coal and Its Use in Coking Blends
Energy & Fuels, 2012Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Changhui Lin, Shibiao Ren, Chunxiu Pan, Shigang KangAbstract:The demand for metallurgical coke for blast furnaces is forcing the coke-making industry to look for new sources of coking Coals. Noncoking Coals are attractive for use in the coke-making Coal blends, because they are cheaper and more available. In this study, a Chinese Sub-Bituminous Coal with noncaking property was hydrothermally treated in order to modify its caking and coking properties to be used in coke-making Coal blends as much as possible. The caking and coking properties of the hydrothermally treated Coals were characterized by solvent extraction, caking index (GRI) measurement, and crucible coking determination. The results show that the solvent extraction yield and GRI of the Sub-Bituminous Coal can be greatly increased by hydrothermal treatment at proper conditions and the removal of oxygen functional groups, especially the hydroxyl group, thus dissociating the aggregated structure of Coal is responsible for the modification results. Crucible coking determinations suggest that hydrothermal tr...
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Modification of a Sub-Bituminous Coal by Hydrothermal Treatment with the Addition of CaO: Extraction and Caking Properties
Energy & Fuels, 2012Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Changhui Lin, Shibiao Ren, Xiangyu Zhang, Shigang KangAbstract:A Chinese Sub-Bituminous Coal, i.e., Shengfu (SF) Coal, was hydrothermally treated with and without CaO addition at different temperatures, and the extraction yields and caking indexes (GRI) of the treated Coals were measured. The action of CaO during hydrothermal treatment was probed in this study. The results show that hydrothermal treatment can obviously increase the extraction yield and GRI of SF Coal, and CaO can further promote this effect of hydrothermal treatment. The removal of oxygen functional groups, especially the hydroxyl group, dissociating the aggregated structure of Coal, is responsible for the modifying results. CaO can supply a basic environment for the hydrothermal treatment, which is beneficial for the removal of acidic oxygen functional groups by acid–base interactions and promotes the effect of hydrothermal treatment for SF Coal, resulting in additional increases in the extraction yield and GRI.
Shibiao Ren - One of the best experts on this subject based on the ideXlab platform.
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Study on hydro-liquefaction kinetics of thermal dissolution soluble fraction from Shenfu Sub-Bituminous Coal
Fuel, 2017Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Shibiao Ren, Chunxiu Pan, Yan Zhou, Tao Shui, Shigang KangAbstract:Abstract Thermal dissolution (TD) of Coal and hydro-liquefaction of the thermal dissolution soluble fraction (TDSF) with a high activity catalyst is one of effective high efficient hydro-liquefaction of Coal techniques. In this study, a Chinese Shenfu (SF) Sub-Bituminous Coal was thermally dissolved, and the TDSF obtained was further hydro-liquefied with Ni–Mo-S/Al 2 O 3 catalyst. Based on the hydro-liquefaction results, a model including series and parallel reactions was established for the hydro-liquefaction of TDSF catalyzed by Ni–Mo-S/Al 2 O 3 , and the regressive reactions were ruled out in the model. From the kinetic parameters calculated, it suggested that the regressive reactions including the char formation reactions were negligible in the hydro-liquefaction of TDSF catalyzed by Ni–Mo-S/Al 2 O 3 . The reactions of TDSF to preasphaltene and preasphaltene to oil + gas predominated the formation of oil + gas. Ni–Mo-S/Al 2 O 3 could decrease the activation energy of preasphaltene to oil + gas reaction, thus promoting the formation of oil and gas in the catalytic hydro-liquefaction of TDSF.
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Study on the Use of the Thermal Dissolution Soluble Fraction from Shenfu Sub-Bituminous Coal in Coke-Making Coal Blends
Energy & Fuels, 2015Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Shibiao Ren, Chunxiu Pan, Shigang KangAbstract:Thermal dissolution (TD) of a Chinese Shenfu Sub-Bituminous Coal (SFSBC) at different conditions was carried out, and the effects of the addition of a thermal dissolution soluble fraction (TDSF) in coke-making Coal blends on the properties of coke were evaluated in this study. The results suggested that SFSBC gave the highest thermal dissolution soluble yield (TDSY) of 61.9% in 1-methylnaphthalen (1-MN) at 360 °C. Then, the TDSY decreased to 44.8% when the TD temperature increased to 380 °C because of pyrolysis and condensation reactions of Coal taking place at this temperature. Polar solvents gave larger dissolution ability to SFSBC than nonpolar solvents. The properties of TDSFs obtained from different conditions were quite different. At the TD temperature of 320–360 °C, the TDSF in 1-MN at a higher temperature contained more −OH groups with a narrow thermoplastic temperature interval compared to that at a lower temperature. The TDSFs in polar solvents crude methyl naphthalene oil (CMNO) and 1-MN added ...
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Hydrothermal Treatment of a Sub-Bituminous Coal and Its Use in Coking Blends
Energy & Fuels, 2012Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Changhui Lin, Shibiao Ren, Chunxiu Pan, Shigang KangAbstract:The demand for metallurgical coke for blast furnaces is forcing the coke-making industry to look for new sources of coking Coals. Noncoking Coals are attractive for use in the coke-making Coal blends, because they are cheaper and more available. In this study, a Chinese Sub-Bituminous Coal with noncaking property was hydrothermally treated in order to modify its caking and coking properties to be used in coke-making Coal blends as much as possible. The caking and coking properties of the hydrothermally treated Coals were characterized by solvent extraction, caking index (GRI) measurement, and crucible coking determination. The results show that the solvent extraction yield and GRI of the Sub-Bituminous Coal can be greatly increased by hydrothermal treatment at proper conditions and the removal of oxygen functional groups, especially the hydroxyl group, thus dissociating the aggregated structure of Coal is responsible for the modification results. Crucible coking determinations suggest that hydrothermal tr...
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Modification of a Sub-Bituminous Coal by Hydrothermal Treatment with the Addition of CaO: Extraction and Caking Properties
Energy & Fuels, 2012Co-Authors: Hengfu Shui, Zhicai Wang, Zhiping Lei, Changhui Lin, Shibiao Ren, Xiangyu Zhang, Shigang KangAbstract:A Chinese Sub-Bituminous Coal, i.e., Shengfu (SF) Coal, was hydrothermally treated with and without CaO addition at different temperatures, and the extraction yields and caking indexes (GRI) of the treated Coals were measured. The action of CaO during hydrothermal treatment was probed in this study. The results show that hydrothermal treatment can obviously increase the extraction yield and GRI of SF Coal, and CaO can further promote this effect of hydrothermal treatment. The removal of oxygen functional groups, especially the hydroxyl group, dissociating the aggregated structure of Coal, is responsible for the modifying results. CaO can supply a basic environment for the hydrothermal treatment, which is beneficial for the removal of acidic oxygen functional groups by acid–base interactions and promotes the effect of hydrothermal treatment for SF Coal, resulting in additional increases in the extraction yield and GRI.
