Redox reactivity of titania‐doped YSZ‐promoted iron‐based oxygen carrier over multiple redox cycles for chemical looping reforming of methane and hydrogen production

2020 ◽  
Vol 44 (6) ◽  
pp. 4919-4932 ◽  
Author(s):  
Jun Kyu Lee ◽  
Hae In Lee ◽  
Hyun Seok Cho ◽  
Chang Hee Kim ◽  
Won Chul Cho
Keyword(s):  
Hydrogen Production ◽  
Oxygen Carrier ◽  
Chemical Looping ◽  
Redox Cycles ◽  
Redox Reactivity ◽  
Iron Based

Chemically and physically robust, commercially-viable iron-based composite oxygen carriers sustainable over 3000 redox cycles at high temperatures for chemical looping applications

2017 ◽  
Vol 10 (11) ◽  
pp. 2318-2323 ◽  
Author(s):  
Cheng Chung ◽  
Lang Qin ◽  
Vedant Shah ◽  
Liang-Shih Fan
Keyword(s):  
Mechanical Stability ◽  
Chemical Reactivity ◽  
Low Cost ◽  
Oxygen Carrier ◽  
Chemical Looping ◽  
Titanium Oxides ◽  
Oxygen Carriers ◽  
Redox Cycles ◽  
Iron Based

A low-cost oxygen carrier material realized through an Al-based skeleton encapsulating iron–titanium oxides with long-term chemical reactivity and mechanical stability for commercial chemical looping applications.

scholarly journals Feasibility Study of an Iron-Based Composite Added with Al2O3/ZrO2 as an Oxygen Carrier in the Chemical Looping Applications

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 971
Author(s):  
Ching-Ti Kao ◽  
Cheng-Hsien Shen ◽  
Heng-Wen Hsu
Keyword(s):  
Relative Density ◽  
Feasibility Study ◽  
Spinel Phase ◽  
Oxygen Carrier ◽  
Dense Layer ◽  
Chemical Looping ◽  
Oxygen Carriers ◽  
Redox Cycles ◽  
Iron Based ◽  
Crush Strength

The chemical looping process is a promising approach for carbon capture. Oxygen carriers play the crucial role of carrying oxygen between oxidation and reduction reactors. In this study, iron-based composites, added with alumina and zirconia, were used as the oxygen carriers. The feasibility study of these composites for chemical looping applications was then evaluated by measuring their properties, including mechanical properties, relative density, microstructures, crystal structure, and their capacity of oxygen. The results suggest that the addition of zirconia led the decrease of the bulk relative density and thus had a negative effect to both crush strength and attrition. Crush strength declined from 57 kgf to 26 kgf when using zirconia, replacing alumina, in an iron-based composite as the inner material. In addition, the phases in oxidizing and reducing reaction were also revealed. The formation of the spinel phase (FeAl2O4) was the major factor that altered the capacity of oxygen. It inhibited Fe2O3’s ability to be completely reduced to Fe and thus decrease the capacity of oxygen. The value was therefore decreased from 9.7% to 6.2% after 50 redox cycles in alumina addition composite. On the other hand, for the zirconia addition, all of the Fe2O3 could transform to Fe, which provided 8.5% of oxygen capacity after 50 redox cycles. A dense layer which was identified as the Fe2O3 in the bulk surface was observed in the samples reacted with 50 redox cycles. The proposed mechanism of the formation of Fe2O3 layer and its corresponding kinetic analysis was also revealed in this study.

scholarly journals CO2-gasification of a lignite coal in the presence of an iron-based oxygen carrier for chemical-looping combustion

Fuel ◽  
2014 ◽  
Vol 127 ◽  
pp. 186-201 ◽  
Author(s):  
Marco A. Saucedo ◽  
Jin Yang. Lim ◽  
John S. Dennis ◽  
Stuart A. Scott
Keyword(s):  
Oxygen Carrier ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Co2 Gasification ◽  
Lignite Coal ◽  
Iron Based

Syngas production by chemical looping co-gasification of rice husk and coal using an iron-based oxygen carrier

Fuel ◽  
2022 ◽  
Vol 309 ◽  
pp. 122100
Author(s):  
Ming Luo ◽  
Haiyan Zhang ◽  
Shuxiang Wang ◽  
Jianjun Cai ◽  
Yanjun Qin ◽  
...  
Keyword(s):  
Rice Husk ◽  
Oxygen Carrier ◽  
Chemical Looping ◽  
Syngas Production ◽  
Iron Based

scholarly journals The direct solid-solid reaction between coal char and iron-based oxygen carrier and its contribution to solid-fueled chemical looping combustion

2016 ◽  
Vol 184 ◽  
pp. 9-18 ◽  
Author(s):  
Liangyong Chen ◽  
Jinhua Bao ◽  
Liang Kong ◽  
Megan Combs ◽  
Heather S. Nikolic ◽  
...  
Keyword(s):  
Oxygen Carrier ◽  
Coal Char ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Solid Reaction ◽  
Iron Based ◽  
Direct Solid

Coal direct chemical looping hydrogen production with K-Fe-Al composite oxygen carrier

2018 ◽  
Vol 75 ◽  
pp. 24-31 ◽  
Author(s):  
Zhongliang Yu ◽  
Tao Liu ◽  
Chunyu Li ◽  
Shuai Guo ◽  
Xing Zhou ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Oxygen Carrier ◽  
Chemical Looping ◽  
Al Composite
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