碳化作用
煅烧
损耗
吸附剂
流化床
烟气
材料科学
钙环
化学工程
环境科学
矿物学
废物管理
化学
吸附
工程类
复合材料
催化作用
有机化学
牙科
医学
生物化学
作者
Belén González,Mónica Alonso,J.C. Abanades
出处
期刊:Fuel
[Elsevier]
日期:2010-10-01
卷期号:89 (10): 2918-2924
被引量:72
标识
DOI:10.1016/j.fuel.2010.01.019
摘要
There is increasing interest in CO2 looping cycles that involve the repeated calcination and carbonation of the sorbent as a way to capture CO2 from flue gases during the carbonation step and the generation of a pure stream of CO2 in the oxyfired calcination step. In particular, attrition of the material in these interconnected fluidized bed reactors is a problem of general concern. Attrition of limestone derived materials has been studied in fluidized bed systems by numerous authors. In this work, we have investigated the attrition of two limestones used in a system of two interconnected circulating fluidized bed reactors operating in continuous mode as carbonation and calciner reactors. We observed a rapid initial attrition of both limestones during the calcination step which was then followed by a highly stable period (up to 140 h of added circulation for one of the limestones) during which particle size changes were negligible. This is consistent with previous observations of attrition in other systems that employ these materials. However, a comparison of the attrition model constants with the data reported in the literature showed the two limestones to be particularly fragile during the initial calcination and the first few hours of circulation. Thus, a careful choice of limestone based on its attrition properties must be taken into account in designing future carbonate looping systems.
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