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碱式碳酸镁催化酚醛聚合制备多孔炭及其CO2吸附性能

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Indexed by:期刊论文

Date of Publication:2015-05-04

Journal:化工学报

Included Journals:EI、PKU、ISTIC、CSCD、Scopus

Volume:66

Issue:7

Page Number:2565-2572

ISSN No.:0438-1157

Key Words:多孔炭;二氧化碳捕集;碱式碳酸镁;吸附;多孔介质;动态穿透

Abstract:利用碱式碳酸镁的催化功能及易分解特性,实现间苯二酚、甲醛的快速凝胶,炭化得到孔隙发达的整体式多孔炭(MCM-Mg),其轴向抗压强度达9.4 MPa。与普通碳酸盐催化的样品相比,MCM-Mg孔隙更为发达。273 K下该系列样品的静态CO2吸附量可达3.49~4.50 mmol·g?1(0.1 MPa),0.015 MPa最高可达1.87 mmol·g?1。研究发现,微孔对材料吸附性能起主导作用;MCM-Mg的单位微孔比表面积可吸附7.15μmol CO2,超过了大部分活化法制备的炭材料。多组分动态穿透实验表明,该系列材料可实现CO2/N2的完全分离;材料具有良好的耐水汽性能和循环吸附-脱附性能,室温下经惰性气体吹扫即可实现再生。

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