Properties of a nano CaO/Al2O3 CO2 sorbent

被引：186
作者：
Wu, Su F. [1 ]
Li, Qing H.
Kim, Jong N.
Yi, Kwang B.
机构：
[1] Zhejiang Univ, Dept Chem Engn, Hangzhou 310027, Peoples R China
[2] Korea Inst Energy Res, Chem Proc Res Ctr, Taejon 305343, South Korea
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2008年 / 47卷 / 01期
关键词：
D O I：
10.1021/ie0704748
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
This project studied the properties of nano CaO/Al2O3 as a high-temperature CO2 sorbent for its use in an adsorption enhanced reforming reaction. The sorbent containing nand CaCO3 precursors and aluminum oxide was prepared, and evaluation of the CO2 adsorption properties by a thermogravimetric analyzer, the results show that nano CaO/Al2O3 has a faster decomposition rate and has a higher CO2 adsorption ratio than micro CaO/Al2O3. The maximum adsorption ratio occurs at temperatures of 650 degrees C under a CO2 partial pressure of 0.33 atm. Durability studies show that the CO2 adsorption ratio remains at 68.3% after 50 cyclic runs under a carbonation temperature of 650 C and calcination temperature of 800 degrees C, respectively. XRD, SEM, and BET were used for studying the change of micro characteristics of the CO2 sorbents before and after multiple carbonation-calcination runs. The results showed that the pore size of CaO/Al2O3 sorbents was enlarged and that a new substance (Ca12Al14O33) was formed even under a temperature of 800 degrees C for the function of keeping the compound stable and durable.
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收藏
页码：180 / 184
页数：5
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