燃料化学学报2015，Vol.43Issue(12)：1489-1497,9.
新型多级微/介孔固态胺吸附剂的制备及其CO2吸附性能研究
Preparation and CO2 adsorption performance of a novel hierarchical micro/mesoporous solid amine sorbent
摘要
Abstract
The mixed supports were obtained at different weight ratios of HZSM-5 to MCM-41 by physical mixing processes. Tetraethylenepentamine ( TEPA ) modified mixed supports sorbents were prepared by the impregnation method. The sorbents were characterized by nitrogen adsorption/desorption, Fourier transform infrared spectroscopy ( FT-IR) and thermogravimetric analysis ( TGA) techniques. The effects of mixing ratios of HZSM-5 to MCM-41, TEPA loadings, adsorption temperatures, influent velocities, and CO2 partial pressures on CO2 adsorption capacity were investigated in a fixed bed reactor. It showed that the maximum CO2 adsorption capacity was 3 . 57 mmol/g of HZSM-5/MCM-41-30%TEPA at the adsorption temperature of 55℃ and influent velocity of 30 mL/min. After ten-cycles, the CO2 adsorption capacity decreased by 8. 1%. CO2 adsorption was determined by a two-stage process, a fast breakthrough adsorption and a gradual approaching equilibrium stage. Moreover, the breakthrough adsorption capacity accounted for approximately 80% of the equilibrium adsorption capacity. The Avrami model could fit well with the experimental data of HZSM-5/MCM-41-30%TEPA. It illustrated that the adsorption mechanism was dominated by both chemical and physical adsorption.关键词
微/介孔复合分子筛/四乙烯五胺/CO2吸附/再生性能/吸附动力学Key words
micro/mesoporous composites/tetraethylenepentamine/CO2 adsorption/regenerability/adsorption kinetics分类
化学化工引用本文复制引用
孔童童,王霞,郭庆杰..新型多级微/介孔固态胺吸附剂的制备及其CO2吸附性能研究[J].燃料化学学报,2015,43(12):1489-1497,9.基金项目
The project was supported by the National Natural Science Foundation of China (21276129) and Qingdao Application Foundation Research Project (14-2-4-5-jch). 国家自然科学基金(21276129)和青岛市应用基础研究计划项目(14-2-4-5-jch)资助 （21276129）
