关键词: 化学链技术, 煤转化, 氧传递, 载氧体, 反应器优化

Abstract: Chemical looping technology paves a new way for the clean utilization of fossil fuel. On the basis of the research status and feature of coal chemical looping combustion/gasification，a summary of oxygen carrier in the chemical looping conversion and the intensification of coal-oxygen carrier reaction and chemical looping reactor was conducted. The researchers should pay much attention to three key points in chemical looping process，including ①further investigation into oxygen transfer and the reaction mechanism of the oxygen carrier-coal-ash-gasifying medium system should be carried out；②We will focus on three kinds of oxygen carriers，oxygen carrier with multi-active component，oxygen carrier coupling with catalysis-oxygen carrying-C/S capture function，and oxygen carrier with oxygen storage；③intensification of reaction and reactor should be processed in the future.

Key words: chemical-looping technology, coal conversion, oxygen transfer, oxygen carrier, optimal design of reactor