摘要
用富含胺基的物质对多孔材料进行修饰可以得到高CO2吸附量的吸附剂。采用浸渍法将聚乙烯亚胺(PEI)和2-氨基-2-甲基-1-丙醇(AMP)负载在拟薄水铝石上,考察了CO2压力、胺类物质负载量等对吸附性能的影响。采用低温N2吸附/脱附法(BET)、扫描电镜(SEM)、傅里叶变换红外线光谱分析仪(FTIR)等手段表征了吸附剂的结构特征及其物理性质,并使用重量法微天平实验装置对吸附剂的性能进行了评价。实验结果表明,当温度恒定为50℃,压力小于1MPa时,负载PEI的吸附剂最高的CO2吸附量为77.53mg CO2.(g吸附剂)-1,最佳负载量为85%;压力大于1 MPa时,负载PEI的吸附剂最高的CO2吸附量为123.79 mgCO2.(g吸附剂)-1,最佳负载量为10%。负载AMP的吸附剂最高的CO2吸附量为128.01mg CO2.(g吸附剂)-1,最佳负载量为85%。CO2吸附稳定性实验表明,吸附剂对CO2的吸附性能稳定。
Porous materials modified by amino can reach high CO2 adsorption capacity. In this study, adsorbents were prepared by modifying polyethylene imine （PEI） and 2-amino-2-methyl-1-propanol （AMP） on pseudoboehmite. The effects of CO2 pressure and content of PEI/AMP on CO2 capacity were examined. Adsorbents were characterized by N2 adsorption/desorption, scanning electron microscopy, and Fourier transform infrared spectroscopy. Experiment showed that at 50℃, the highest CO2 adsorption capacity reached 77.53 mg CO2· （g adsorbent） 1 with PEI loading of 85% at reaction pressures〈1 MPa. For reaction pressures 1 MPa〈P≤2 MPa, the highest CO2 adsorption capacity of 123.79 mg CO2· （g adsorbent） 1 was obtained. For AMP loaded adsorbents, the highest CO2 adsorption capacity was 128.01 mg CO2· （g adsorbent）^-1 with AMP loading of 85%. Adsorption/desorption cycles showed that CO2 capacity of adsorbents changed little.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2013年第2期574-580,共7页
CIESC Journal
基金
国家自然科学基金项目(20976096)
中国石油科技创新基金研究项目(2011D-5006-0407)~~
