Chemical looping combustion performance of CoFeAlO<sub>4</sub> oxygen carrier with self-supported function

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Chemical looping combustion performance of CoFeAlO₄ oxygen carrier with self-supported function

更新时间：2025-12-10

- Chemical looping combustion performance of CoFeAlO₄ oxygen carrier with self-supported function
- CIESC Journal Issue 1, Pages: 515-522(2018)
- 作者机构：
  
  东南大学能源热转换及其过程测控教育部重点实验室,江苏,南京,210096
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20170980
  CLC： K16
- Online First：05 January 2018，
  
  Published：05 January 2018
- 稿件说明：
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PENG Song, ZENG Dewang, CHEN Chao, et al. Chemical looping combustion performance of CoFeAlO₄ oxygen carrier with self-supported function[J]. CIESC Journal, 2018, (1): 515-522. DOI: 10.11949/j.issn.0438-1157.20170980.
DOI：

PENG Song, ZENG Dewang, CHEN Chao, et al. Chemical looping combustion performance of CoFeAlO₄ oxygen carrier with self-supported function[J]. CIESC Journal, 2018, (1): 515-522. DOI: 10.11949/j.issn.0438-1157.20170980. DOI：

摘要

采用燃烧法合成了具有尖晶石结构的CoFeAlO4载氧体材料，通过表征手段和实验研究考察了不同温度下CoFeAlO4载氧体的化学链燃烧反应特性和循环稳定性，并对CoFeAlO4载氧体晶相结构和表观形貌的变化规律进行了分析。结果表明，温度升高有利于提高CoFeAlO4载氧体转化还原性气体CO的能力，使得还原反应速率更快，但高温下经“还原-氧化”会造成CoFeAlO4载氧体相态分离，难以保持稳定的自载体尖晶石结构。对反应前后CoFeAlO4载氧体晶相结构的分析表明，高温条件下经过“还原-氧化”后生成的CoFe2O4和CoAl2O4是导致CoFeAlO4载氧体烧结和循环稳定性下降的主要原因。

Abstract

The CoFeAlO4 oxygen-containing materials with spinel structure were synthesized by combustion synthesis. The chemical looping combustion reaction and cycling thermal stability of CoFeAlO4 oxygen carriers were investigated and characterized at different temperatures. The changes in the crystal structure and surface morphology of CoFeAlO4 oxygen carriers were analyzed. The results show that the increase of temperature is beneficial to improve the ability of CoFeAlO4 to convert reducible gas CO

resulting in the reduction rate faster

but redox at high temperature will cause CoFeAlO4 oxygen carrier phase separation

it is difficult to maintain a stable self-supported spinel structure. The analysis of the crystal structure of CoFeAlO4 oxygen carrier crystals before and after the reaction shows that the CoFe2O4 and CoAl2O4 detected after the redox cycle at high temperature is the main reason for the sintering of CoFeAlO4 oxygen carrier and the decrease of its cyclic thermal stability.

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