The Experts below are selected from a list of 3219 Experts worldwide ranked by ideXlab platform
José Corella - One of the best experts on this subject based on the ideXlab platform.
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Biomass gasification in atmospheric and bubbling fluidized bed: Effect of the type of Gasifying Agent on the product distribution
Biomass and Bioenergy, 1999Co-Authors: Javier Gil, José Corella, María P. Aznar, Miguel A. CaballeroAbstract:The effect of the type of Gasifying Agent used in biomass gasification on product distribution (gas, char and tar yields) and gas quality (contents in H2, CO, CO2, CH4,…, tars) is analyzed. Gasifying Agents taken into account are: air, pure steam, and steam–O2 mixtures. Process considered is biomass gasification in atmospheric and bubbling fluidized bed. Previous results got by Herguido et al. (Ind. Eng. Chem. Res. 1992; 31(2): 1274–82), Gil et al. (Energy and Fuels 1997; 11(6): 1109–18) and Narvaez et al. (Ind. Eng. Chem. Res. 1996; 35(7): 2110–20) are compared. Such authors carried their research on biomass gasification under similar conditions but varying the Gasifying Agent. Three different Gasifying Agent-to-biomass ratios are needed and used to compare results. The relationships between the H2, CO,…, tar contents in the flue gas and the type and amount of Gasifying Agent used are shown after a carefully analysis.
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commercial steam reforming catalysts to improve biomass gasification with steam oxygen mixtures 2 catalytic tar removal
Industrial & Engineering Chemistry Research, 1998Co-Authors: María P. Aznar, Javier Gil, Miguel A. Caballero, Juan A Martin, José CorellaAbstract:Eight different commercial catalysts, nickel based, for steam reforming of naphthas and of natural gas are tested in biomass gasification for hot gas cleanup and conditioning. They were manufactured by BASF AG, ICI−Katalco, UCI, and Haldor Topsoe a/s. The catalysts were tested in a slip flow after a biomass gasifier of fluidized bed type at small pilot-plant scale (10−20 kg of biomass/h). The Gasifying Agent used is steam-oxygen mixtures. A guard bed containing a calcined dolomite is used to decrease the tar content in the gas at the inlet of the catalytic bed. Main variables studied are catalyst type, bed temperature, H2O + O2 to biomass feed ratio, and time-on-stream. All catalysts for reforming of naphthas show to be very active and useful for tar removal and gas conditioning (in biomass gasification). 98% tar removal is easily obtained with space velocities of 14 000 h-1 (n.c.). No catalysts deactivation is found in 48 h-on-stream tests when the catalyst temperature is relatively high (780−830 °C). Us...
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biomass gasification in fluidized bed at pilot scale with steam oxygen mixtures product distribution for very different operating conditions
Energy & Fuels, 1997Co-Authors: Javier Gil, María P. Aznar, Miguel A. Caballero, And Eva Frances, José CorellaAbstract:Biomass gasification in a fluidized bed with steam−O2 mixtures has been studied in detail at pilot plant scale. The gasifier used was 15 cm i.d. and 3.2 m high, and it was fed with pine wood chips at flow rates of 5−20 kg/h. Main operating variables studied were gasifier bed temperature (780−890 °C), steam to oxygen in the feeding ratio (2−3 mol/mol), and Gasifying Agent (H2O + O2) to biomass fed ratio (0.6−1.6 kg/kg daf). Product distribution here shown includes gas, tar and char yields, gas composition (H2, CO, CO2, CH4, steam, ...) and heating value, tar composition and content in the flue gas, gas heating value, apparent thermal efficiency, etc. Under good operating conditions the following gas is obtained: tar content of 5 g/Nm3, 30 vol % H2, heating value of 16.0 MJ/Nm3 (dry basis), gas yield of 1.2 Nm3 (dry basis)/kg biomass fed.
Hongcang Zhou - One of the best experts on this subject based on the ideXlab platform.
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high temperature air steam blown gasification of coal in a pressurized spout fluid bed
Energy & Fuels, 2006Co-Authors: Rui Xiao, Mingyao Zhang, Baosheng Jin, Yaji Huang, Hongcang ZhouAbstract:The concept of high-temperature air/steam-blown gasification technology for converting coal into low-caloric-value gas for power generation is proposed and evaluated experimentally. Preliminary experiments are performed in a 0.1 MW thermal input pressurized spout-fluid bed gasifier. The influences of the Gasifying Agent preheat temperature, the gasification temperature and pressure, the equivalence ratio, the ratio of steam-to-coal on gas composition, gas higher heating value, carbon conversion, and cold gas efficiency are examined. The experimental results prove the feasibility of high-temperature air/steam-blown gasification process. The gas heating value is increased by 23%, when the Gasifying Agent temperature is increased from 300 to 700 °C. For the operation conditions studied, the results show that gasification temperature is the most important factor influencing coal gasification in the spout-fluid bed. The gasifier performance is improved at elevated pressure mainly due to the better fluidization...
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High-temperature air/steam-blown gasification of coal in a pressurized spout-fluid bed
Energy & Fuels, 2006Co-Authors: Rui Xiao, Mingyao Zhang, Baosheng Jin, Yaji Huang, Hongcang ZhouAbstract:The concept of high-temperature air/steam-blown gasification technology for converting coal into low-caloric-value gas for power generation is proposed and evaluated experimentally. Preliminary experiments are performed in a 0.1 MW thermal input pressurized spout-fluid bed gasifier. The influences of the Gasifying Agent preheat temperature, the gasification temperature and pressure, the equivalence ratio, the ratio of steam-to-coal on gas composition, gas higher heating value, carbon conversion, and cold gas efficiency are examined. The experimental results prove the feasibility of high-temperature air/steam-blown gasification process. The gas heating value is increased by 23%, when the Gasifying Agent temperature is increased from 300 to 700 °C. For the operation conditions studied, the results show that gasification temperature is the most important factor influencing coal gasification in the spout-fluid bed. The gasifier performance is improved at elevated pressure mainly due to the better fluidization...
María P. Aznar - One of the best experts on this subject based on the ideXlab platform.
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Biomass gasification in atmospheric and bubbling fluidized bed: Effect of the type of Gasifying Agent on the product distribution
Biomass and Bioenergy, 1999Co-Authors: Javier Gil, José Corella, María P. Aznar, Miguel A. CaballeroAbstract:The effect of the type of Gasifying Agent used in biomass gasification on product distribution (gas, char and tar yields) and gas quality (contents in H2, CO, CO2, CH4,…, tars) is analyzed. Gasifying Agents taken into account are: air, pure steam, and steam–O2 mixtures. Process considered is biomass gasification in atmospheric and bubbling fluidized bed. Previous results got by Herguido et al. (Ind. Eng. Chem. Res. 1992; 31(2): 1274–82), Gil et al. (Energy and Fuels 1997; 11(6): 1109–18) and Narvaez et al. (Ind. Eng. Chem. Res. 1996; 35(7): 2110–20) are compared. Such authors carried their research on biomass gasification under similar conditions but varying the Gasifying Agent. Three different Gasifying Agent-to-biomass ratios are needed and used to compare results. The relationships between the H2, CO,…, tar contents in the flue gas and the type and amount of Gasifying Agent used are shown after a carefully analysis.
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commercial steam reforming catalysts to improve biomass gasification with steam oxygen mixtures 2 catalytic tar removal
Industrial & Engineering Chemistry Research, 1998Co-Authors: María P. Aznar, Javier Gil, Miguel A. Caballero, Juan A Martin, José CorellaAbstract:Eight different commercial catalysts, nickel based, for steam reforming of naphthas and of natural gas are tested in biomass gasification for hot gas cleanup and conditioning. They were manufactured by BASF AG, ICI−Katalco, UCI, and Haldor Topsoe a/s. The catalysts were tested in a slip flow after a biomass gasifier of fluidized bed type at small pilot-plant scale (10−20 kg of biomass/h). The Gasifying Agent used is steam-oxygen mixtures. A guard bed containing a calcined dolomite is used to decrease the tar content in the gas at the inlet of the catalytic bed. Main variables studied are catalyst type, bed temperature, H2O + O2 to biomass feed ratio, and time-on-stream. All catalysts for reforming of naphthas show to be very active and useful for tar removal and gas conditioning (in biomass gasification). 98% tar removal is easily obtained with space velocities of 14 000 h-1 (n.c.). No catalysts deactivation is found in 48 h-on-stream tests when the catalyst temperature is relatively high (780−830 °C). Us...
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biomass gasification in fluidized bed at pilot scale with steam oxygen mixtures product distribution for very different operating conditions
Energy & Fuels, 1997Co-Authors: Javier Gil, María P. Aznar, Miguel A. Caballero, And Eva Frances, José CorellaAbstract:Biomass gasification in a fluidized bed with steam−O2 mixtures has been studied in detail at pilot plant scale. The gasifier used was 15 cm i.d. and 3.2 m high, and it was fed with pine wood chips at flow rates of 5−20 kg/h. Main operating variables studied were gasifier bed temperature (780−890 °C), steam to oxygen in the feeding ratio (2−3 mol/mol), and Gasifying Agent (H2O + O2) to biomass fed ratio (0.6−1.6 kg/kg daf). Product distribution here shown includes gas, tar and char yields, gas composition (H2, CO, CO2, CH4, steam, ...) and heating value, tar composition and content in the flue gas, gas heating value, apparent thermal efficiency, etc. Under good operating conditions the following gas is obtained: tar content of 5 g/Nm3, 30 vol % H2, heating value of 16.0 MJ/Nm3 (dry basis), gas yield of 1.2 Nm3 (dry basis)/kg biomass fed.
Rui Xiao - One of the best experts on this subject based on the ideXlab platform.
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high temperature air steam blown gasification of coal in a pressurized spout fluid bed
Energy & Fuels, 2006Co-Authors: Rui Xiao, Mingyao Zhang, Baosheng Jin, Yaji Huang, Hongcang ZhouAbstract:The concept of high-temperature air/steam-blown gasification technology for converting coal into low-caloric-value gas for power generation is proposed and evaluated experimentally. Preliminary experiments are performed in a 0.1 MW thermal input pressurized spout-fluid bed gasifier. The influences of the Gasifying Agent preheat temperature, the gasification temperature and pressure, the equivalence ratio, the ratio of steam-to-coal on gas composition, gas higher heating value, carbon conversion, and cold gas efficiency are examined. The experimental results prove the feasibility of high-temperature air/steam-blown gasification process. The gas heating value is increased by 23%, when the Gasifying Agent temperature is increased from 300 to 700 °C. For the operation conditions studied, the results show that gasification temperature is the most important factor influencing coal gasification in the spout-fluid bed. The gasifier performance is improved at elevated pressure mainly due to the better fluidization...
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High-temperature air/steam-blown gasification of coal in a pressurized spout-fluid bed
Energy & Fuels, 2006Co-Authors: Rui Xiao, Mingyao Zhang, Baosheng Jin, Yaji Huang, Hongcang ZhouAbstract:The concept of high-temperature air/steam-blown gasification technology for converting coal into low-caloric-value gas for power generation is proposed and evaluated experimentally. Preliminary experiments are performed in a 0.1 MW thermal input pressurized spout-fluid bed gasifier. The influences of the Gasifying Agent preheat temperature, the gasification temperature and pressure, the equivalence ratio, the ratio of steam-to-coal on gas composition, gas higher heating value, carbon conversion, and cold gas efficiency are examined. The experimental results prove the feasibility of high-temperature air/steam-blown gasification process. The gas heating value is increased by 23%, when the Gasifying Agent temperature is increased from 300 to 700 °C. For the operation conditions studied, the results show that gasification temperature is the most important factor influencing coal gasification in the spout-fluid bed. The gasifier performance is improved at elevated pressure mainly due to the better fluidization...
Javier Gil - One of the best experts on this subject based on the ideXlab platform.
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Biomass gasification in atmospheric and bubbling fluidized bed: Effect of the type of Gasifying Agent on the product distribution
Biomass and Bioenergy, 1999Co-Authors: Javier Gil, José Corella, María P. Aznar, Miguel A. CaballeroAbstract:The effect of the type of Gasifying Agent used in biomass gasification on product distribution (gas, char and tar yields) and gas quality (contents in H2, CO, CO2, CH4,…, tars) is analyzed. Gasifying Agents taken into account are: air, pure steam, and steam–O2 mixtures. Process considered is biomass gasification in atmospheric and bubbling fluidized bed. Previous results got by Herguido et al. (Ind. Eng. Chem. Res. 1992; 31(2): 1274–82), Gil et al. (Energy and Fuels 1997; 11(6): 1109–18) and Narvaez et al. (Ind. Eng. Chem. Res. 1996; 35(7): 2110–20) are compared. Such authors carried their research on biomass gasification under similar conditions but varying the Gasifying Agent. Three different Gasifying Agent-to-biomass ratios are needed and used to compare results. The relationships between the H2, CO,…, tar contents in the flue gas and the type and amount of Gasifying Agent used are shown after a carefully analysis.
-
commercial steam reforming catalysts to improve biomass gasification with steam oxygen mixtures 2 catalytic tar removal
Industrial & Engineering Chemistry Research, 1998Co-Authors: María P. Aznar, Javier Gil, Miguel A. Caballero, Juan A Martin, José CorellaAbstract:Eight different commercial catalysts, nickel based, for steam reforming of naphthas and of natural gas are tested in biomass gasification for hot gas cleanup and conditioning. They were manufactured by BASF AG, ICI−Katalco, UCI, and Haldor Topsoe a/s. The catalysts were tested in a slip flow after a biomass gasifier of fluidized bed type at small pilot-plant scale (10−20 kg of biomass/h). The Gasifying Agent used is steam-oxygen mixtures. A guard bed containing a calcined dolomite is used to decrease the tar content in the gas at the inlet of the catalytic bed. Main variables studied are catalyst type, bed temperature, H2O + O2 to biomass feed ratio, and time-on-stream. All catalysts for reforming of naphthas show to be very active and useful for tar removal and gas conditioning (in biomass gasification). 98% tar removal is easily obtained with space velocities of 14 000 h-1 (n.c.). No catalysts deactivation is found in 48 h-on-stream tests when the catalyst temperature is relatively high (780−830 °C). Us...
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biomass gasification in fluidized bed at pilot scale with steam oxygen mixtures product distribution for very different operating conditions
Energy & Fuels, 1997Co-Authors: Javier Gil, María P. Aznar, Miguel A. Caballero, And Eva Frances, José CorellaAbstract:Biomass gasification in a fluidized bed with steam−O2 mixtures has been studied in detail at pilot plant scale. The gasifier used was 15 cm i.d. and 3.2 m high, and it was fed with pine wood chips at flow rates of 5−20 kg/h. Main operating variables studied were gasifier bed temperature (780−890 °C), steam to oxygen in the feeding ratio (2−3 mol/mol), and Gasifying Agent (H2O + O2) to biomass fed ratio (0.6−1.6 kg/kg daf). Product distribution here shown includes gas, tar and char yields, gas composition (H2, CO, CO2, CH4, steam, ...) and heating value, tar composition and content in the flue gas, gas heating value, apparent thermal efficiency, etc. Under good operating conditions the following gas is obtained: tar content of 5 g/Nm3, 30 vol % H2, heating value of 16.0 MJ/Nm3 (dry basis), gas yield of 1.2 Nm3 (dry basis)/kg biomass fed.