Study of inexpensive oxygen carriers for chemical looping combustion

被引：102

作者：

Fossdal, A. ^{[1
]}

Bakken, E. ^{[2
]}

Oye, B. A. ^{[1
]}

Schoning, C. ^{[1
]}

Kaus, I. ^{[1
]}

Mokkelbost, T. ^{[1
]}

Larring, Y. ^{[2
]}

机构：

[1] SINTEF Mat & Chem, NO-7465 Trondheim, Norway

[2] SINTEF Mat & Chem, NO-0314 Oslo, Norway

来源：

INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL | 2011年 / 5卷 / 03期

关键词：

Oxygen carrier materials; Chemical looping combustion; Natural minerals; Industrial by-products; SOLID FUELS; OXIDES;

D O I：

10.1016/j.ijggc.2010.08.001

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Norwegian industrial tailings and by-products, as well as naturally occurring minerals and ores have been surveyed with the purpose of identifying candidate oxygen carrier materials for use in a chemical looping combustion process. Nine materials, based on manganese and/or iron oxide, were selected for an initial screening test: six were deemed promising and were hence investigated further. Thermogravimetric experiments were performed to investigate the oxygen capacity, the reaction kinetics and reversibility of the oxygen absorption reaction. A manganese ore with a reversible capacity of 4.9 wt% oxygen at 1000 degrees C was selected as the most promising for chemical looping combustion applications. This material was modified by addition of calcia to explore the possibility of enhancing the kinetic, catalytic and mechanical properties. The addition of excess calcium relative to manganese resulted in formation of calcium manganite and related phases. The oxygen capacity of the modified material was 4.5 wt.% at 1000 degrees C, but it has potential advantages in terms of kinetics and chemical and mechanical stability relative to the pure ore. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：483 / 488

页数：6

共 12 条

[1] Nonstoichiometry and reductive decomposition of CaMnO3-δ [J].