化工学报 ›› 2015, Vol. 66 ›› Issue (7): 2565-2572.DOI: 10.11949/j.issn.0438-1157.20141744

• 分离工程 • 上一篇    下一篇

碱式碳酸镁催化酚醛聚合制备多孔炭及其CO2吸附性能

王恩民, 李文翠, 雷成, 陆安慧   

  1. 大连理工大学化工学院, 精细化工国家重点实验室, 辽宁 大连 116024
  • 收稿日期:2014-11-25 修回日期:2015-04-24 出版日期:2015-07-05 发布日期:2015-07-05
  • 通讯作者: 陆安慧
  • 基金资助:

    国家杰出青年科学基金项目(21225312);国家重点基础研究发展计划项目(2013CB934104)。

Synthesis of porous carbon through polymerization catalyzed by basic magnesium carbonate and their CO2 adsorption performance

WANG Enmin, LI Wencui, LEI Cheng, LU Anhui   

  1. State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
  • Received:2014-11-25 Revised:2015-04-24 Online:2015-07-05 Published:2015-07-05
  • Supported by:

    supported by the National Science Fund for Distinguished Young Scholars (21225312) and the National Basic Research Program of China (2013CB934104).

摘要:

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7.15 μmol 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。

关键词: 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:

By taking the advantages of easy decomposition and catalytic function of basic magnesium carbonate, the mechanically stable porous carbon materials (MCM-Mg) are synthesized through rapid gelation of resorcinol with formaldehyde and subsequently carbonization. Compared with samples catalyzed by traditional carbonates, the synthesis process can obtain a well-developed porous structure. The resulted samples can withstand a pressure of up to 9.4 MPa. At 273 K, the equilibrium CO2 adsorption capacities of MCM-Mg are in the range of 3.49—4.50 mmol·g-1 at 0.1 MPa and can reach 1.87 mmol·g-1 at 0.015 MPa. Experimental test of the MCM-Mg shows that the micropores play a major role in contribution of the amount of adsorbed CO2. Importantly, MCM-Mg can adsorb 7.15 μmol CO2 per Smicro, which surpasses most of the carbons prepared by activation. Dynamic breakthrough tests show that over such series of samples, CO2/N2 streams can be fully separated. The CO2 release is achieved facilely in Ar purge at 298 K. The samples also exhibit stable performance for CO2 separation under humid conditions and exhibit good regeneration capability.

Key words: porous carbon, CO2 capture, basic magnesium carbonate, adsorption, porous media, dynamic breakthrough

中图分类号: