The Experts below are selected from a list of 147 Experts worldwide ranked by ideXlab platform
Chen Chong - One of the best experts on this subject based on the ideXlab platform.
-
CO2 Gasification of Municipal Solid Waste in a Drop-Tube Reactor: Experimental Study and Thermodynamic Analysis of SynGas
Energy & Fuels, 2018Co-Authors: Xiaoyuan Zheng, Zhi Ying, Bo Wang, Chen ChongAbstract:A Gasification-based waste-to-energy technique has been considered as a promising alternative to direct incineration. With the potential benefits of reducing the greenhouse Gas emission and producing synGas, CO2 gaisification of municipal solid waste (MSW) was studied in a drop-tube reactor. Process parameters, including the temperature and CO2/MSW mass ratio, were investigated. On the basis of the experimental results, energy and exergy analyses were conducted to evaluate the thermodynamic quality. Results indicated that the temperature had a significant impact on the synGas composition, while the effects of the CO2/MSW mass ratio were not so profound. The tendency of the synGas composition revealed that the Boudouard Reaction, Water Gas Reaction, and free radical combination Reaction were the most influential Reactions in the Gasification process. Energy and exergy analyses showed that the total energy and exergy values of synGas increased with the rising temperature, whereas they declined initially and...
-
Hydrogen and synGas production from municipal solid waste (MSW) Gasification via reusing CO2
Applied Thermal Engineering, 2018Co-Authors: Xiaoyuan Zheng, Zhi Ying, Bo Wang, Chen ChongAbstract:Abstract Hydrogen and synGas production from MSW steam Gasification with reusing CO2 has been conducted in this study. Two key parameters of Gasification temperature and CO2/steam ratio in ranges of 1000–1100 °C and 0.5–3 are taken into consideration. The experiments reveal that increasing CO2/steam ratio in the range of 0.5 and 2.5 increases both H2 and CO molar yield. At the same time, the CO2 conversion efficiency rises. It indicates that Boudouard Reaction and Water Gas Reaction proceed independently in the Gasification process. With the conditions of CO2/steam ratio = 2.5 and 1000 °C, the CO2 conversion efficiency augments to 50.22% and the maximum H2 molar yield of 18.82 mol/kg-msw can be observed. Under this condition, the highest values of 63.19% for CGE, 0.95 Nm3/kg-msw for Gas yield and 12.41 MJ/Nm3 for LHV are obtained. In the steam-only atmosphere, there exist maximum values for H2 molar yield and Gas yield as well. The values of both CGE and CCE are lower than those under the steam-CO2 atmosphere. In conclusion, MSW Gasification with the addition of CO2 simultaneously has the advantages of waste-to-energy, reusing CO2 and producing hydrogen and synGas.
Xiaoyuan Zheng - One of the best experts on this subject based on the ideXlab platform.
-
CO2 Gasification of Municipal Solid Waste in a Drop-Tube Reactor: Experimental Study and Thermodynamic Analysis of SynGas
Energy & Fuels, 2018Co-Authors: Xiaoyuan Zheng, Zhi Ying, Bo Wang, Chen ChongAbstract:A Gasification-based waste-to-energy technique has been considered as a promising alternative to direct incineration. With the potential benefits of reducing the greenhouse Gas emission and producing synGas, CO2 gaisification of municipal solid waste (MSW) was studied in a drop-tube reactor. Process parameters, including the temperature and CO2/MSW mass ratio, were investigated. On the basis of the experimental results, energy and exergy analyses were conducted to evaluate the thermodynamic quality. Results indicated that the temperature had a significant impact on the synGas composition, while the effects of the CO2/MSW mass ratio were not so profound. The tendency of the synGas composition revealed that the Boudouard Reaction, Water Gas Reaction, and free radical combination Reaction were the most influential Reactions in the Gasification process. Energy and exergy analyses showed that the total energy and exergy values of synGas increased with the rising temperature, whereas they declined initially and...
-
Hydrogen and synGas production from municipal solid waste (MSW) Gasification via reusing CO2
Applied Thermal Engineering, 2018Co-Authors: Xiaoyuan Zheng, Zhi Ying, Bo Wang, Chen ChongAbstract:Abstract Hydrogen and synGas production from MSW steam Gasification with reusing CO2 has been conducted in this study. Two key parameters of Gasification temperature and CO2/steam ratio in ranges of 1000–1100 °C and 0.5–3 are taken into consideration. The experiments reveal that increasing CO2/steam ratio in the range of 0.5 and 2.5 increases both H2 and CO molar yield. At the same time, the CO2 conversion efficiency rises. It indicates that Boudouard Reaction and Water Gas Reaction proceed independently in the Gasification process. With the conditions of CO2/steam ratio = 2.5 and 1000 °C, the CO2 conversion efficiency augments to 50.22% and the maximum H2 molar yield of 18.82 mol/kg-msw can be observed. Under this condition, the highest values of 63.19% for CGE, 0.95 Nm3/kg-msw for Gas yield and 12.41 MJ/Nm3 for LHV are obtained. In the steam-only atmosphere, there exist maximum values for H2 molar yield and Gas yield as well. The values of both CGE and CCE are lower than those under the steam-CO2 atmosphere. In conclusion, MSW Gasification with the addition of CO2 simultaneously has the advantages of waste-to-energy, reusing CO2 and producing hydrogen and synGas.
Serena M Best - One of the best experts on this subject based on the ideXlab platform.
-
Optimization of the sintering atmosphere for high-density hydroxyapatite-carbon nanotube composites.
Journal of the Royal Society Interface, 2010Co-Authors: Ashley A White, Ian A Kinloch, Alan H Windle, Serena M BestAbstract:Hydroxyapatite-carbon nanotube (HA-CNT) composites have the potential for improved mechanical properties over HA for use in bone graft applications. Finding an appropriate sintering atmosphere for this composite presents a dilemma, as HA requires Water in the sintering atmosphere to remain phase pure and well hydroxylated, yet CNTs oxidize at the high temperatures required for sintering. The purpose of this study was to optimize the atmosphere for sintering these composites. While the Reaction between carbon and Water to form carbon monoxide and hydrogen at high temperatures (known as the 'Water-Gas Reaction') would seem to present a problem for sintering these composites, Le Chatelier's principle suggests this Reaction can be suppressed by increasing the concentration of carbon monoxide and hydrogen relative to the concentration of carbon and Water, so as to retain the CNTs and keep the HA's structure intact. Eight sintering atmospheres were investigated, including standard atmospheres (such as air and wet Ar), as well as atmospheres based on the Water-Gas Reaction. It was found that sintering in an atmosphere of carbon monoxide and hydrogen, with a small amount of Water added, resulted in an optimal combination of phase purity, hydroxylation, CNT retention and density.
-
Optimization of the sintering atmosphere for high-density hydroxyapatite–carbon nanotube composites
Journal of The Royal Society Interface, 2010Co-Authors: Ashley A White, Ian A Kinloch, Alan H Windle, Serena M BestAbstract:Hydroxyapatite–carbon nanotube (HA–CNT) composites have the potential for improved mechanical properties over HA for use in bone graft applications. Finding an appropriate sintering atmosphere for this composite presents a dilemma, as HA requires Water in the sintering atmosphere to remain phase pure and well hydroxylated, yet CNTs oxidize at the high temperatures required for sintering. The purpose of this study was to optimize the atmosphere for sintering these composites. While the Reaction between carbon and Water to form carbon monoxide and hydrogen at high temperatures (known as the ‘Water–Gas Reaction’) would seem to present a problem for sintering these composites, Le Chatelier's principle suggests this Reaction can be suppressed by increasing the concentration of carbon monoxide and hydrogen relative to the concentration of carbon and Water, so as to retain the CNTs and keep the HA's structure intact. Eight sintering atmospheres were investigated, including standard atmospheres (such as air and wet Ar), as well as atmospheres based on the Water–Gas Reaction. It was found that sintering in an atmosphere of carbon monoxide and hydrogen, with a small amount of Water added, resulted in an optimal combination of phase purity, hydroxylation, CNT retention and density.
Bo Wang - One of the best experts on this subject based on the ideXlab platform.
-
CO2 Gasification of Municipal Solid Waste in a Drop-Tube Reactor: Experimental Study and Thermodynamic Analysis of SynGas
Energy & Fuels, 2018Co-Authors: Xiaoyuan Zheng, Zhi Ying, Bo Wang, Chen ChongAbstract:A Gasification-based waste-to-energy technique has been considered as a promising alternative to direct incineration. With the potential benefits of reducing the greenhouse Gas emission and producing synGas, CO2 gaisification of municipal solid waste (MSW) was studied in a drop-tube reactor. Process parameters, including the temperature and CO2/MSW mass ratio, were investigated. On the basis of the experimental results, energy and exergy analyses were conducted to evaluate the thermodynamic quality. Results indicated that the temperature had a significant impact on the synGas composition, while the effects of the CO2/MSW mass ratio were not so profound. The tendency of the synGas composition revealed that the Boudouard Reaction, Water Gas Reaction, and free radical combination Reaction were the most influential Reactions in the Gasification process. Energy and exergy analyses showed that the total energy and exergy values of synGas increased with the rising temperature, whereas they declined initially and...
-
Hydrogen and synGas production from municipal solid waste (MSW) Gasification via reusing CO2
Applied Thermal Engineering, 2018Co-Authors: Xiaoyuan Zheng, Zhi Ying, Bo Wang, Chen ChongAbstract:Abstract Hydrogen and synGas production from MSW steam Gasification with reusing CO2 has been conducted in this study. Two key parameters of Gasification temperature and CO2/steam ratio in ranges of 1000–1100 °C and 0.5–3 are taken into consideration. The experiments reveal that increasing CO2/steam ratio in the range of 0.5 and 2.5 increases both H2 and CO molar yield. At the same time, the CO2 conversion efficiency rises. It indicates that Boudouard Reaction and Water Gas Reaction proceed independently in the Gasification process. With the conditions of CO2/steam ratio = 2.5 and 1000 °C, the CO2 conversion efficiency augments to 50.22% and the maximum H2 molar yield of 18.82 mol/kg-msw can be observed. Under this condition, the highest values of 63.19% for CGE, 0.95 Nm3/kg-msw for Gas yield and 12.41 MJ/Nm3 for LHV are obtained. In the steam-only atmosphere, there exist maximum values for H2 molar yield and Gas yield as well. The values of both CGE and CCE are lower than those under the steam-CO2 atmosphere. In conclusion, MSW Gasification with the addition of CO2 simultaneously has the advantages of waste-to-energy, reusing CO2 and producing hydrogen and synGas.
Zhi Ying - One of the best experts on this subject based on the ideXlab platform.
-
CO2 Gasification of Municipal Solid Waste in a Drop-Tube Reactor: Experimental Study and Thermodynamic Analysis of SynGas
Energy & Fuels, 2018Co-Authors: Xiaoyuan Zheng, Zhi Ying, Bo Wang, Chen ChongAbstract:A Gasification-based waste-to-energy technique has been considered as a promising alternative to direct incineration. With the potential benefits of reducing the greenhouse Gas emission and producing synGas, CO2 gaisification of municipal solid waste (MSW) was studied in a drop-tube reactor. Process parameters, including the temperature and CO2/MSW mass ratio, were investigated. On the basis of the experimental results, energy and exergy analyses were conducted to evaluate the thermodynamic quality. Results indicated that the temperature had a significant impact on the synGas composition, while the effects of the CO2/MSW mass ratio were not so profound. The tendency of the synGas composition revealed that the Boudouard Reaction, Water Gas Reaction, and free radical combination Reaction were the most influential Reactions in the Gasification process. Energy and exergy analyses showed that the total energy and exergy values of synGas increased with the rising temperature, whereas they declined initially and...
-
Hydrogen and synGas production from municipal solid waste (MSW) Gasification via reusing CO2
Applied Thermal Engineering, 2018Co-Authors: Xiaoyuan Zheng, Zhi Ying, Bo Wang, Chen ChongAbstract:Abstract Hydrogen and synGas production from MSW steam Gasification with reusing CO2 has been conducted in this study. Two key parameters of Gasification temperature and CO2/steam ratio in ranges of 1000–1100 °C and 0.5–3 are taken into consideration. The experiments reveal that increasing CO2/steam ratio in the range of 0.5 and 2.5 increases both H2 and CO molar yield. At the same time, the CO2 conversion efficiency rises. It indicates that Boudouard Reaction and Water Gas Reaction proceed independently in the Gasification process. With the conditions of CO2/steam ratio = 2.5 and 1000 °C, the CO2 conversion efficiency augments to 50.22% and the maximum H2 molar yield of 18.82 mol/kg-msw can be observed. Under this condition, the highest values of 63.19% for CGE, 0.95 Nm3/kg-msw for Gas yield and 12.41 MJ/Nm3 for LHV are obtained. In the steam-only atmosphere, there exist maximum values for H2 molar yield and Gas yield as well. The values of both CGE and CCE are lower than those under the steam-CO2 atmosphere. In conclusion, MSW Gasification with the addition of CO2 simultaneously has the advantages of waste-to-energy, reusing CO2 and producing hydrogen and synGas.
