CaxLa1-xMn1-yMyO3-δ (M = Mg, Ti, Fe, or Cu) as Oxygen Carriers for Chemical-Looping with Oxygen Uncoupling (CLOU)

被引：51

作者：

Arjmand, Mehdi ^{[1
]}

Hedayati, Ali ^{[1
]}

Azad, Abdul-Majeed ^{[2
,3
]}

Leion, Henrik ^{[1
]}

Ryden, Magnus ^{[3
]}

Mattisson, Tobias ^{[3
]}

机构：

[1] Chalmers Univ Technol, Dept Chem & Biol Engn, Div Environm Inorgan Chem, SE-41296 Gothenburg, Sweden

[2] Univ Toledo, Dept Chem Engn, Toledo, OH 43606 USA

[3] Chalmers Univ Technol, Environm & Energy Dept, Div Energy Technol, SE-41296 Gothenburg, Sweden

来源：

ENERGY & FUELS | 2013年 / 27卷 / 08期

基金：

欧洲研究理事会;

关键词：

COMBUSTION; REACTOR; CLC; NIO;

D O I：

10.1021/ef3020102

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Perovskite materials of the type CaxLa1-xMn1-yMyO3-delta (M = Mg, Ti, Fe, or Cu) have been investigated as oxygen carriers for the chemical-looping with oxygen uncoupling (CLOU) process. The oxygen carrier, particles were Produced by mechanical homogenization of primary solids in a rotary, evaporator, followed by extrusion and calcination, at 1300 degrees C for 6 h. The chemical-looping characteristics of the substituted perovskites developed in this work were evaluated in a laboratory-scale fluidized-bed reactor in the temperature range of 900-1000 degrees C during alternating reducing and oxidizing conditions. The oxygen carriers showed oxygen releasing behaviour (CLOU) in an inert atmosphere between 900 and 1000 degrees C. In addition, their reactivity with methane was high, approaching complete gas yield for all of the materials at 950 degrees C, with the exception being the Cu-doped perovskite, which defluidized during reduction. The rates of oxygen release were also investigated using devolatilized wood char as solid were found to be similar. The required solids inventory in the fuel reactor for the perovskite oxygen carriers is estimated to be 325 kg/MWth. All of the formulation exhibited high rates of oxidation and a high degree of stability, with no particle fragmentation or agglomeration. The high reactivity and favourable oxygen uncoupling properties make these oxygen carriers promising candidates for the CLOU process.

引用

页码：4097 / 4107

页数：11

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