Adsorption of CO2 from Simulated Flue Gas on Pentaethylenehexamine-Loaded Mesoporous Silica Support Adsorbent
详细信息 查看全文
- 作者：Li Wei ; Zhengming Gao ; Yu Jing ; Yundong Wang
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2013
- 出版时间：October 23, 2013
- 年：2013
- 卷：52
- 期：42
- 页码：14965-14974
- 全文大小：589K
- 年卷期：v.52,no.42(October 23, 2013)
- ISSN：1520-5045
文摘
A novel solid adsorbent for CO2 capture was developed by loading pentaethylenehexamine (PEHA) on SBA-15 by a wet impregnation method. The structural properties of the adsorbents were characterized by the XRD, N2 adsorption/desorption, TGA, SEM, and TEM techniques. The effects of PEHA loading, adsorption temperature, and height/diameter ratio of the fixed bed on the CO2 adsorption performance were investigated in a fixed-bed adsorption system. The structural characterization showed that both the surface area and total pore volume of PEHA-loaded SBA-15 decreased with increasing PEHA loading. The CO2 working adsorption capacity reached 201.7 mg of CO2/(g of adsorbent) for SBA-15鈥揚EHA-70 and 308.3 mg of CO2/(g of PEHA) for SBA-15鈥揚EHA-50. A two-amine-layer adsorption model was built to interpret the CO2 adsorption performance. The CO2 working adsorption capacity decreased with increasing height/diameter ratio; however, the CO2 breakthrough adsorption capacity increased. Regeneration experiments showed that the CO2 working adsorption capacity of SBA-15鈥揚EHA remained stable in consecutive adsorption/desorption cycles.