The Experts below are selected from a list of 228 Experts worldwide ranked by ideXlab platform
Xiao Dongdong - One of the best experts on this subject based on the ideXlab platform.
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Study of elemental mercury oxidation over an SCR catalyst with Calcium Chloride addition
Chemical Engineering Journal, 2014Co-Authors: Zhang Mengze, Peng Wang, Yong Dong, Sui Hui, Xiao DongdongAbstract:Abstract Elemental mercury in the flue gas of coal combustion is challenging to remove. A new method is introduced of adding Calcium Chloride to a commercial SCR catalyst in a fixed bed to evaluate the effect on elemental mercury oxidation. In simulated coal combustion flue gas at 350 °C, the Calcium Chloride addition dramatically enhanced the Hg 0 oxidation activity over the catalyst. By adding 1.0 wt.% Calcium Chloride to the catalyst, the Hg 0 oxidation efficiency rose from 7.7% to 78.8%. With a temperature increase from 100 °C to 400 °C, the catalytic oxidation efficiency of elemental mercury considerably increased, and mercury capture by the catalyst dropped. Both oxygen and sulfur dioxide exhibited promotional effects on Hg 0 oxidation, whereas water vapor inhibited it. No apparent difference was observed by varying the nitric oxide concentration. The positive function of Calcium Chloride addition on elemental mercury oxidation is due to two reasons: hydrogen Chloride formed through the hydrolysis process of Calcium Chloride and active chlorine species generated by Calcium Chloride. Experimental study showed that no significant effect of Calcium Chloride addition on NOx reduction and SO 2 –SO 3 conversion has been observed. Because oxidized mercury can be easily removed by traditional pollutant control equipment and because Calcium Chloride is enriched in the wastewater of the wet flue gas desulfurization system in power plants, this method shows a reasonable simultaneous mercury reduction method.
Dongdong Xiao - One of the best experts on this subject based on the ideXlab platform.
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Study of elemental mercury oxidation over an SCR catalyst with Calcium Chloride addition
Chemical Engineering Journal, 2014Co-Authors: Mengze Zhang, Peng Wang, Yong Dong, Dongdong XiaoAbstract:Abstract Elemental mercury in the flue gas of coal combustion is challenging to remove. A new method is introduced of adding Calcium Chloride to a commercial SCR catalyst in a fixed bed to evaluate the effect on elemental mercury oxidation. In simulated coal combustion flue gas at 350 °C, the Calcium Chloride addition dramatically enhanced the Hg 0 oxidation activity over the catalyst. By adding 1.0 wt.% Calcium Chloride to the catalyst, the Hg 0 oxidation efficiency rose from 7.7% to 78.8%. With a temperature increase from 100 °C to 400 °C, the catalytic oxidation efficiency of elemental mercury considerably increased, and mercury capture by the catalyst dropped. Both oxygen and sulfur dioxide exhibited promotional effects on Hg 0 oxidation, whereas water vapor inhibited it. No apparent difference was observed by varying the nitric oxide concentration. The positive function of Calcium Chloride addition on elemental mercury oxidation is due to two reasons: hydrogen Chloride formed through the hydrolysis process of Calcium Chloride and active chlorine species generated by Calcium Chloride. Experimental study showed that no significant effect of Calcium Chloride addition on NOx reduction and SO 2 –SO 3 conversion has been observed. Because oxidized mercury can be easily removed by traditional pollutant control equipment and because Calcium Chloride is enriched in the wastewater of the wet flue gas desulfurization system in power plants, this method shows a reasonable simultaneous mercury reduction method.
Yong Dong - One of the best experts on this subject based on the ideXlab platform.
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Study of elemental mercury oxidation over an SCR catalyst with Calcium Chloride addition
Chemical Engineering Journal, 2014Co-Authors: Mengze Zhang, Peng Wang, Yong Dong, Dongdong XiaoAbstract:Abstract Elemental mercury in the flue gas of coal combustion is challenging to remove. A new method is introduced of adding Calcium Chloride to a commercial SCR catalyst in a fixed bed to evaluate the effect on elemental mercury oxidation. In simulated coal combustion flue gas at 350 °C, the Calcium Chloride addition dramatically enhanced the Hg 0 oxidation activity over the catalyst. By adding 1.0 wt.% Calcium Chloride to the catalyst, the Hg 0 oxidation efficiency rose from 7.7% to 78.8%. With a temperature increase from 100 °C to 400 °C, the catalytic oxidation efficiency of elemental mercury considerably increased, and mercury capture by the catalyst dropped. Both oxygen and sulfur dioxide exhibited promotional effects on Hg 0 oxidation, whereas water vapor inhibited it. No apparent difference was observed by varying the nitric oxide concentration. The positive function of Calcium Chloride addition on elemental mercury oxidation is due to two reasons: hydrogen Chloride formed through the hydrolysis process of Calcium Chloride and active chlorine species generated by Calcium Chloride. Experimental study showed that no significant effect of Calcium Chloride addition on NOx reduction and SO 2 –SO 3 conversion has been observed. Because oxidized mercury can be easily removed by traditional pollutant control equipment and because Calcium Chloride is enriched in the wastewater of the wet flue gas desulfurization system in power plants, this method shows a reasonable simultaneous mercury reduction method.
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Study of elemental mercury oxidation over an SCR catalyst with Calcium Chloride addition
Chemical Engineering Journal, 2014Co-Authors: Zhang Mengze, Peng Wang, Yong Dong, Sui Hui, Xiao DongdongAbstract:Abstract Elemental mercury in the flue gas of coal combustion is challenging to remove. A new method is introduced of adding Calcium Chloride to a commercial SCR catalyst in a fixed bed to evaluate the effect on elemental mercury oxidation. In simulated coal combustion flue gas at 350 °C, the Calcium Chloride addition dramatically enhanced the Hg 0 oxidation activity over the catalyst. By adding 1.0 wt.% Calcium Chloride to the catalyst, the Hg 0 oxidation efficiency rose from 7.7% to 78.8%. With a temperature increase from 100 °C to 400 °C, the catalytic oxidation efficiency of elemental mercury considerably increased, and mercury capture by the catalyst dropped. Both oxygen and sulfur dioxide exhibited promotional effects on Hg 0 oxidation, whereas water vapor inhibited it. No apparent difference was observed by varying the nitric oxide concentration. The positive function of Calcium Chloride addition on elemental mercury oxidation is due to two reasons: hydrogen Chloride formed through the hydrolysis process of Calcium Chloride and active chlorine species generated by Calcium Chloride. Experimental study showed that no significant effect of Calcium Chloride addition on NOx reduction and SO 2 –SO 3 conversion has been observed. Because oxidized mercury can be easily removed by traditional pollutant control equipment and because Calcium Chloride is enriched in the wastewater of the wet flue gas desulfurization system in power plants, this method shows a reasonable simultaneous mercury reduction method.
Peng Wang - One of the best experts on this subject based on the ideXlab platform.
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Study of elemental mercury oxidation over an SCR catalyst with Calcium Chloride addition
Chemical Engineering Journal, 2014Co-Authors: Mengze Zhang, Peng Wang, Yong Dong, Dongdong XiaoAbstract:Abstract Elemental mercury in the flue gas of coal combustion is challenging to remove. A new method is introduced of adding Calcium Chloride to a commercial SCR catalyst in a fixed bed to evaluate the effect on elemental mercury oxidation. In simulated coal combustion flue gas at 350 °C, the Calcium Chloride addition dramatically enhanced the Hg 0 oxidation activity over the catalyst. By adding 1.0 wt.% Calcium Chloride to the catalyst, the Hg 0 oxidation efficiency rose from 7.7% to 78.8%. With a temperature increase from 100 °C to 400 °C, the catalytic oxidation efficiency of elemental mercury considerably increased, and mercury capture by the catalyst dropped. Both oxygen and sulfur dioxide exhibited promotional effects on Hg 0 oxidation, whereas water vapor inhibited it. No apparent difference was observed by varying the nitric oxide concentration. The positive function of Calcium Chloride addition on elemental mercury oxidation is due to two reasons: hydrogen Chloride formed through the hydrolysis process of Calcium Chloride and active chlorine species generated by Calcium Chloride. Experimental study showed that no significant effect of Calcium Chloride addition on NOx reduction and SO 2 –SO 3 conversion has been observed. Because oxidized mercury can be easily removed by traditional pollutant control equipment and because Calcium Chloride is enriched in the wastewater of the wet flue gas desulfurization system in power plants, this method shows a reasonable simultaneous mercury reduction method.
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Study of elemental mercury oxidation over an SCR catalyst with Calcium Chloride addition
Chemical Engineering Journal, 2014Co-Authors: Zhang Mengze, Peng Wang, Yong Dong, Sui Hui, Xiao DongdongAbstract:Abstract Elemental mercury in the flue gas of coal combustion is challenging to remove. A new method is introduced of adding Calcium Chloride to a commercial SCR catalyst in a fixed bed to evaluate the effect on elemental mercury oxidation. In simulated coal combustion flue gas at 350 °C, the Calcium Chloride addition dramatically enhanced the Hg 0 oxidation activity over the catalyst. By adding 1.0 wt.% Calcium Chloride to the catalyst, the Hg 0 oxidation efficiency rose from 7.7% to 78.8%. With a temperature increase from 100 °C to 400 °C, the catalytic oxidation efficiency of elemental mercury considerably increased, and mercury capture by the catalyst dropped. Both oxygen and sulfur dioxide exhibited promotional effects on Hg 0 oxidation, whereas water vapor inhibited it. No apparent difference was observed by varying the nitric oxide concentration. The positive function of Calcium Chloride addition on elemental mercury oxidation is due to two reasons: hydrogen Chloride formed through the hydrolysis process of Calcium Chloride and active chlorine species generated by Calcium Chloride. Experimental study showed that no significant effect of Calcium Chloride addition on NOx reduction and SO 2 –SO 3 conversion has been observed. Because oxidized mercury can be easily removed by traditional pollutant control equipment and because Calcium Chloride is enriched in the wastewater of the wet flue gas desulfurization system in power plants, this method shows a reasonable simultaneous mercury reduction method.
Yushi Hirata - One of the best experts on this subject based on the ideXlab platform.
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composite reactants of Calcium Chloride combined with functional carbon materials for chemical heat pumps
Applied Thermal Engineering, 2008Co-Authors: Keiko Fujioka, Kensuke Hatanaka, Yushi HirataAbstract:Abstract Enhancement of heat transfer in the reactor bed is one of the most important subjects for developing gas–solid chemical heat pumps. This study deals with composite reactants combining Calcium Chloride with expanded graphite (EG) and activated carbon fiber (ACF) to promote the reaction between Calcium Chloride and working fluid of methanol. We measured variations of effective thermal conductivity as well as volume and void fraction during reaction cycles. Effective thermal conductivity of the EG composite bed was larger than 60% that of untreated Calcium Chloride bed. Because of the bulky structure of expanded graphite, the overall void fraction of EG composite was larger than 0.8. When the overall void fraction was reduced below 0.78 by compressing the bed, the effective thermal conductivity was sharply increased up to 10 times higher than that of untreated Calcium Chloride bed. On the contrary, the effective thermal conductivity of ACF composite bed was slightly smaller than that of Calcium Chloride bed and no remarkable change was brought about by compression. The volume and the overall void fraction of these composite particle beds varied only slightly with the amount of methanol reacted, while those of Calcium Chloride bed without carbon materials were largely influenced by reaction.