期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 54, 期 36, 页码 8860-8866出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.5b01175
关键词
-
资金
- U.S. Department of Energy [DE-FG26-03NT41798, DE-FE0003997]
- Illinois Clean Coal Institute (ICCI Project) [11/US-4]
Low-cost MgO-based sorbents were prepared through modification of natural dolomite and were found to be capable of capturing CO, from coal gas at elevated temperatures and pressures (i.e., 3300 degrees < T < 450 degrees C and P > 20 bar). The effect of steam on the reactivity of the MgO sorbents was investigated experimentally. The results indicate that the presence of steam significantly improves the overall rate of the carbonation reaction through two different mechanisms. The presence of steam improves the intrinsic rate of the carbonation reaction by altering the carbonation reaction pathway through the formation of more reactive transient MgO center dot H2O/Mg(OH)(2)(center dot) intermediate compounds. The formation of the transient intermediate compounds with larger molar volume (compared with MgO) results in the expansion of the inner pores, which lowers diffusion resistance to the reactant gas (i.e., CO2) during carbonation.
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