期刊
CHEMICAL ENGINEERING SCIENCE
卷 65, 期 22, 页码 5841-5851出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2010.08.001
关键词
Fluidization; Combustion; Particle; Batch; Chemical looping combustion (CLC); Oxygen carrier
资金
- Vattenfall AB
- EU
Chemical looping combustion (CLC) uses an oxygen carrier circulating between an air and a fuel reactor to replace direct burning of fuels in air. The very low energy penalty for CO2 separation in CLC gives it the potential to become an important technology on the way to a CO2 neutral energy supply. In this work, the influence of the particle size of coal on the rate of reaction of the coal was investigated in a bed of oxygen carrier. In order to do this, a method to quench the reaction of coal with oxygen carriers at a specified time and measure the particle size distribution of the remaining coal was developed. Three size fractions of coal were used in the experiments: 90-125, 180-212 and 250-355 mu m. Particle size distributions of the fuel show a decrease in particle size with time. The influence of devolatilisation of the coal on the coal particle size was measured, showing that coal particles do not break in the fluidized bed reactor used for the experiments. Reaction rates based on measurements of gas phase concentrations of CO2, CO and CH4 showed that the reaction rate is independent of the particle size. These results are in line with literature findings, as studies have shown that carbon gasification is size-independent at conditions similar to those in the performed CLC experiments. (C) 2010 Published by Elsevier Ltd.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据