REN Yunliang 1, 3, WANG Xingrui 2, 3, ZHANG Hongen1, 3, BI Yamei1, 3, LI Huiquan 2, 3
（1. Henan Zhonghong Group Coal Chemical Co. Ltd, Pingdingshan 467045, China; 2. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; 3. National Energy Key Laboratory for Efficient and Cleaner Coking, Beijing 100190, China）
Abstract： To prepare the low cost solid amine adsorbents with excellent CO2 adsorption property, tetraethylenepentamine (TEPA) was loaded on the diatomite for preparing CO2 adsorbent. N2 adsorption and SEM were applied to characterize the porous structure. The effect of TEPA loading amount and temperature on adsorption capacity was investigated. The regeneration of the adsorbent was conducted. The results indicate that the diatomite has no obvious porous structures and TEPA coats on its surface. The mass fraction of optimum loading amount of TEPA is 40% and CO2 adsorption capacity of 2.1 mmol/g is achieved at 90 ℃ and with CO2 volume fraction of 8%. CO2 discharges thoroughly below 150 ℃. The adsorbent is stable and adsorption capacity is 1.6 mmol/g when the regeneration temperature is 100 ℃ and the vacuum is 2 to 4 kPa.
Keywords: tetraethylenepentamine; diatomite; solid amine adsorbent; loading
中图分类号：TQ424.22 文献标志码：A
文章编号：1008-5548(2015)03-0047-04
DOI:10.13732/j.issn.1008-5548.2015.03.011
收稿日期：2015-02-20，在线出版时间：2015-06-24。
第一作者简介：任云亮（1966—），男，硕士研究生，研究方向为煤化工及机械设备。 E-mail: ryl3900198@163.com。
通信作者简介：李会泉（1970—），男，博士，研究员，研究方向为清洁生产与循环经济技术。 E-mail: hqli@ipe.ac.cn。
