Thermodynamic model of coal direct chemical looping combustion DOI
Min Huang, Zichen Wang,

Xuefeng Yin

et al.

International Journal of Coal Preparation and Utilization, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 18

Published: Dec. 18, 2024

Chemical looping combustion (CLC) technology offers cost-effective CO2 emission reduction. Coal direct chemical (CDCL) emerges as a promising solid fuel CLC owing to its ability directly utilize coal without prior gasification, enhancing system integration and efficiency. Despite significant progress in CDCL, challenges persist, including carbon deposition insufficient oxidation reduction of oxygen carriers (OCs). This study conducted thermodynamic equilibrium analysis CDCL reactor using Cantera 3.0, calculation module developed at the California Institute Technology. The explored impact different temperatures, OC-to-coal molar ratios (θ), OCs types on products. By employing minimum Gibbs function method analyzing intrinsic reaction mechanisms, provides insights for predicting optimizing performance. Thermodynamic revealed that with CuO OC, OC (θ < 0.6) led Cu product, while sufficient (0.6 θ 1.3) yielded CuO, excess > resulted Cu2O. To optimize capture, ratio least 1.4 temperature 800°C are recommended. When Fe2O3 served 0.45) produced Fe FeO, generated FeO Fe3O4. Optimal operational performance capture efficiency required an exceeding higher than 700°C. demonstrates systems, selecting appropriate OCs, ensures stable efficient capture. These findings offer crucial guidance operation.

Language: Английский

Competitive Reaction Mechanism Between Biomass Char and Reduced Oxygen Carrier during Chemical Looping Hydrogen Production DOI
Tianhao Wu,

Yan Lin,

Jiaxian Huang

et al.

Energy & Fuels, Journal Year: 2025, Volume and Issue: 39(6), P. 3256 - 3265

Published: Jan. 31, 2025

Hydrogen as a clean energy source has the potential to significantly reduce carbon emissions. Chemical looping hydrogen production enables preparation of high concentrations H2. In this study, we investigated competitive mechanism between biomass char and reduced-state NiFe2O4 oxygen carriers (OCs) in chemical production. The results show that initial stage reaction when OCs are simultaneously present H2O atmosphere, react preferentially with H2O, while oxidized oxidized-state OCs, which possesses strong storage capacity. As proceeds, gradually enhanced. At same time, can allowing be reduced then continue compete for interaction two an increase conversion char. Therefore, competition greatly influences H2

Language: Английский

Citations

0
Performance improvement and the mechanisms of red mud oxygen carrier in chemical looping gasification using strontium doping strategy DOI
Xiao Li, Rui Dong, Rumeng Zhang

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160772 - 160772

Published: Feb. 1, 2025

Language: Английский

Citations

0
CO2-Utilization Facilitated by Solid Reaction Mediums—A Review DOI Creative Commons
Sherafghan Iftikhar, Fanxing Li

Korean Journal of Chemical Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: March 24, 2025

Language: Английский

Citations

0
Chemical looping co-upgrading of vinegar residue and LD slag into syngas: Insights into reduction kinetics mechanism and multi-cycle performance DOI
Xiaofeng Liu,

Qizhi Guo,

Yuhong Qin

et al.

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 116878 - 116878

Published: May 1, 2025

Language: Английский

Citations

0
Chemical looping gasification of vinegar residue with enhanced LD slag composite Ca-Fe oxygen carrier for syngas production DOI
Xiaofeng Liu,

Huimin Liang,

Yujia Du

et al.

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(6), P. 114707 - 114707

Published: Nov. 7, 2024

Language: Английский

Citations

1
Thermodynamic model of coal direct chemical looping combustion DOI
Min Huang, Zichen Wang,

Xuefeng Yin

et al.

International Journal of Coal Preparation and Utilization, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 18

Published: Dec. 18, 2024

Chemical looping combustion (CLC) technology offers cost-effective CO2 emission reduction. Coal direct chemical (CDCL) emerges as a promising solid fuel CLC owing to its ability directly utilize coal without prior gasification, enhancing system integration and efficiency. Despite significant progress in CDCL, challenges persist, including carbon deposition insufficient oxidation reduction of oxygen carriers (OCs). This study conducted thermodynamic equilibrium analysis CDCL reactor using Cantera 3.0, calculation module developed at the California Institute Technology. The explored impact different temperatures, OC-to-coal molar ratios (θ), OCs types on products. By employing minimum Gibbs function method analyzing intrinsic reaction mechanisms, provides insights for predicting optimizing performance. Thermodynamic revealed that with CuO OC, OC (θ < 0.6) led Cu product, while sufficient (0.6 θ 1.3) yielded CuO, excess > resulted Cu2O. To optimize capture, ratio least 1.4 temperature 800°C are recommended. When Fe2O3 served 0.45) produced Fe FeO, generated FeO Fe3O4. Optimal operational performance capture efficiency required an exceeding higher than 700°C. demonstrates systems, selecting appropriate OCs, ensures stable efficient capture. These findings offer crucial guidance operation.

Language: Английский

Citations

0