Competition between reduction reaction and carbon deposition for CaSO4 oxygen carrier in chemical-looping combustion: A first-principle study and reaction equilibrium analysis

2021 ◽  
pp. 101314
Author(s):  
Fengxiao Hou ◽  
Jing Jin ◽  
Dunyu Liu ◽  
Xuesen Kou ◽  
Haoran Yang ◽  
...  
Keyword(s):  
Carbon Deposition ◽  
Oxygen Carrier ◽  
Reduction Reaction ◽  
Equilibrium Analysis ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
First Principle ◽  
Caso4 Oxygen Carrier ◽  
Reaction Equilibrium

Investigation into compound CaSO4 oxygen carrier for chemical-looping combustion

2011 ◽  
Vol 39 (3) ◽  
pp. 161-168 ◽  
Author(s):  
Ning DING ◽  
Ying ZHENG ◽  
Cong LUO ◽  
Qi-long WU ◽  
Pei-fang FU ◽  
...  
Keyword(s):  
Oxygen Carrier ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Caso4 Oxygen Carrier

Chemical-looping combustion of methane with CaSO4 oxygen carrier in a fixed bed reactor

2008 ◽  
Vol 49 (11) ◽  
pp. 3178-3187 ◽  
Author(s):  
Qilei Song ◽  
Rui Xiao ◽  
Zhongyi Deng ◽  
Huiyan Zhang ◽  
Laihong Shen ◽  
...  
Keyword(s):  
Oxygen Carrier ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Caso4 Oxygen Carrier

Characteristics of a CaSO4 oxygen carrier for chemical-looping combustion: reaction with polyvinylchloride pyrolysis gases in a two-stage reactor

RSC Advances ◽  
2015 ◽  
Vol 5 (44) ◽  
pp. 34913-34920 ◽  
Author(s):  
Wenzhuo Bi ◽  
Tianju Chen ◽  
Ruidong Zhao ◽  
Zhiqi Wang ◽  
Jingli Wu ◽  
...  
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Oxygen Carrier ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Promising Technique ◽  
Free Oxygen ◽  
Incineration Process ◽  
Caso4 Oxygen Carrier ◽  
Pyrolysis Gases

Chemical-looping combustion (CLC), which is a promising technique that includes an inherent separation of CO2 may reduce the generation of dioxins in municipal solid waste (MSW) disposal because in a CLC system, no free oxygen is available for incineration process.

Thermodynamic and Kinetic Analysis of Ca-Based Oxygen Carrier in Chemical-Looping Combustion

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Chang Jing ◽  
Cui Dejie
Keyword(s):  
Kinetic Analysis ◽  
Oxygen Carrier ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Calcium Sulfide ◽  
Oxygen Carriers ◽  
Thermo Gravimetric ◽  
Caso4 Oxygen Carrier ◽  
Carbon Dioxide Co2 ◽  
Gravimetric Apparatus

Chemical-looping combustion (CLC) is a promising technology to capture carbon dioxide (CO2) inherently and conveniently without the additional apparatus. At present, for some metal oxide oxygen carriers, the high costs and the positive hazards to the environment inhibit the developing of CLC systems. The feasibility of using CaSO4 oxygen carrier in the CLC system is studied in this paper. Through the thermodynamic analysis, the carbon deposition and the sulfur evolution are studied in the reaction between CaSO4 and a typical syngas. In addition, providing that hydrogen (H2) is fed as the gaseous fuel in the CLC system, the kinetic analysis is investigated on the reduction of CaSO4 by H2 and the oxidation of calcium sulfide (CaS) by oxygen (O2) through the thermo-gravimetric apparatus (TGA). The kinetic models are built on the reduction and the oxidation of the oxygen carrier. The results calculated from the models agree well with the experimental data. Finally, the possible reaction mechanisms for the reduction and the oxidation are explored.

Effect of hematite addition to CaSO4 oxygen carrier in chemical looping combustion of coal char

RSC Advances ◽  
2015 ◽  
Vol 5 (69) ◽  
pp. 56362-56376 ◽  
Author(s):  
Ning Ding ◽  
Chengwu Zhang ◽  
Cong Luo ◽  
Ying Zheng ◽  
Zhigang Liu
Keyword(s):  
Iron Oxide ◽  
Catalytic Mechanism ◽  
Oxygen Carrier ◽  
Coal Char ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Synergy Effect ◽  
Caso4 Oxygen Carrier

Catalytic mechanism of synergy effect of iron oxide in gasification of char and in the reduction of CaSO4 oxygen carrier.

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