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介孔分子筛MCM-41具有单一的孔道结构和较大的比表面积。通过负载有机胺形成的介孔有机胺二氧化碳固体吸附剂比常见的固体吸附剂具有高选择性、高吸附量等特点。利用化学方法部分脱除模板剂,负载PEI制备固体吸附剂,研究了模板剂脱除率PEI负载和对二氧化碳吸附性能的影响。用XRD、FT-IR、TEM、BET等方法对吸附剂结构进行表征,利用TG/DTA方法测定了CO2吸附量。研究结果表明,使用MCM-41原粉负载50%PEI吸附量达到131.0 mg/g(即262.0 mg/gPEI),比相同负载量除去模板剂的分子筛提高了12.6%;比单一的PEI分子吸附量(80.3 mg/g)提高了3.26倍,这说明在MCM-41原粉孔道内部由于存在丝状胶束而形成的亚纳米空间结构提高了有机胺的分散和利用率,增加了对CO2的吸附量。
Mesoporous molecular sieve MCM-41 has a single pore structure and a large specific surface area. The organic amine-carbon dioxide solid adsorbent formed by supporting organic amines has the characteristics of high selectivity and high adsorption capacity than common solid adsorbents. The chemical method was used to partially remove the template and the PEI was loaded to prepare the solid adsorbent. The influence of the loading of the template agent on the PEI loading and the carbon dioxide adsorption was studied. The structure of the adsorbent was characterized by XRD, FT-IR, TEM and BET. The amount of CO2 adsorption was measured by TG / DTA method. The results showed that the adsorption capacity of the 50% PEI with MCM-41 was 131.0 mg / g (262.0 mg / g PEI), which was 12.6% more than that of the template with the same loading. (80.3 mg / g) increased by 3.26 times, which indicates that the sub-nanometer space structure formed by the presence of filamentous micelles in the pores of MCM-41 original powder increases the dispersion and utilization of organic amines and increases the adsorption of CO2 the amount.