源自密胺基多孔聚合物的富氮微孔炭及选择性吸附CO2

doi:10.3866/PKU.WHXB201404223

物理化学学报 >> 2014, Vol. 30 >> Issue (6): 1169-1174.doi: 10.3866/PKU.WHXB201404223

源自密胺基多孔聚合物的富氮微孔炭及选择性吸附CO₂

胡敬秀, 张静, 邹建锋, 肖强, 钟依均, 朱伟东

浙江师范大学物理化学研究所, 先进催化材料省部共建教育部重点实验室, 浙江金华321004

收稿日期:2014-02-19 修回日期:2014-04-21 发布日期:2014-05-26
通讯作者: 肖强，钟依均 E-mail:xiaoq@zjnu.cn;jyzhong@zjnu.cn
基金资助:
国家自然科学基金（21101139，21371152）资助项目

Nitrogen-Rich Microporous Carbon Derived from Melamine-Based Porous Polymer for Selective CO₂ Adsorption

HU Jing-Xiu, ZHANG Jing, ZOU Jian-Feng, XIAO Qiang, ZHONG Yi-Jun, ZHU Wei-Dong

Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, Zhejiang Province, P. R. China

Received:2014-02-19 Revised:2014-04-21 Published:2014-05-26
Contact: XIAO Qiang, ZHONG Yi-Jun E-mail:xiaoq@zjnu.cn;jyzhong@zjnu.cn
Supported by:
The project was supported by the National Natural Science Foundation of China (21101139, 21371152).

摘要/Abstract

摘要：

以间苯二甲醛和三聚氰胺为原料，通过Schiff 碱缩合反应合成了密胺基多孔聚合物（POP），经高温炭化后得到富氮微孔炭（NMC）. 利用N₂吸脱附和傅里叶变换红外（FTIR）光谱表征了POP和炭化后产物NMC的结构和组成，与POP相比，NMC的官能团数量减少，比表面积和微孔孔容大幅增加. 元素分析表明NMC含氮量高达12.5% （w）. 采用体积法测定了CO₂、CH₄和N₂在NMC上的单组分吸附平衡等温线，NMC展示出良好的CO₂ 吸附性能，298 K、100 kPa 下CO₂ 平衡吸附量可达2.34 mmol·g^-1. 双位Langmuir （DSL）模型和单位Langmuir （SSL）模型分别较好地描述了CO₂、CH₄和N₂在NMC上的吸附平衡数据，在此基础上，应用理想吸附溶液理论（IAST）预测了双组分混合气在NMC上的吸附等温线，结果表明NMC对CO₂-N₂和CO₂-CH₄有非常高的CO₂吸附选择性，分别为144.9和12.8.

关键词: 微孔炭, CO₂吸附, Langmuir模型, 理想吸附溶液理论, 选择性

Abstract:

Nitrogen-rich microporous carbon (NMC) was prepared by the carbonization of a melaminebased porous polymer (POP), which was synthesized via a Schiff base condensation using isophthalaldehyde and melamine as starting materials. N₂ adsorption-desorption and Fourier transform infrared (FTIR) spectroscopy were used to characterize the structural properties of POP and the derived NMC. NMC contains less functional groups and has a higher specific surface area and microporous volume compared to POP. NMC has a N content of up to 12.5% (w), as determined by elemental analysis. Single-component adsorption equilibrium isotherms of CO₂, CH₄, and N₂ on NMC were obtained using a volumetric method. NMC has a good CO₂ capture property and its CO₂ adsorption capacity was 2.34 mmol·g^-1 at 298 K and 100 kPa. Dual-site Langmuir (DSL) or single-site Langmuir (SSL) models appropriately describe the adsorption equilibrium behavior of CO₂, CH₄, and N₂ on NMC. Based on the combined fitting parameters, binary adsorption isotherms were predicted by ideal adsorbed solution theory (IAST). Very high adsorption selectivities of CO₂ over N₂ and CH₄ were obtained and the values were 144.9 and 12.8, respectively.

Key words: Microporous carbon, CO₂ adsorption, Langmuir model, IAST, Selectivity

胡敬秀, 张静, 邹建锋, 肖强, 钟依均, 朱伟东. 源自密胺基多孔聚合物的富氮微孔炭及选择性吸附CO₂[J]. 物理化学学报, 2014, 30(6), 1169-1174. doi: 10.3866/PKU.WHXB201404223

HU Jing-Xiu, ZHANG Jing, ZOU Jian-Feng, XIAO Qiang, ZHONG Yi-Jun, ZHU Wei-Dong. Nitrogen-Rich Microporous Carbon Derived from Melamine-Based Porous Polymer for Selective CO₂ Adsorption[J]. Acta Phys. -Chim. Sin. 2014, 30(6), 1169-1174. doi: 10.3866/PKU.WHXB201404223

链接本文: https://www.whxb.pku.edu.cn/CN/10.3866/PKU.WHXB201404223

https://www.whxb.pku.edu.cn/CN/Y2014/V30/I6/1169

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源自密胺基多孔聚合物的富氮微孔炭及选择性吸附CO₂

Nitrogen-Rich Microporous Carbon Derived from Melamine-Based Porous Polymer for Selective CO₂ Adsorption

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