CIESC Journal ›› 2018, Vol. 69 ›› Issue (11): 4902-4909.DOI: 10.11949/j.issn.0438-1157.20180604

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Improving methane adsorption capacity of HKUST-1 by modified with carboxylic acid

HAN Qiang, CHENG Zhenfei, LIU Jichang, WANG Cheng, OU Suhui, WANG Yuyi, JIAN Yupei, YANG Xiaojuan, WANG Zizhu, YANG Lubin   

  1. State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
  • Received:2018-06-01 Revised:2018-07-30 Online:2018-11-05 Published:2018-11-05

羧酸改性HKUST-1提高甲烷吸附容量

韩强, 程振飞, 刘纪昌, 汪成, 欧苏慧, 汪瑜懿, 简雨培, 杨小娟, 王紫竹, 杨璐彬   

  1. 化学工程联合国家重点实验室, 华东理工大学, 上海 200237
  • 通讯作者: 刘纪昌

Abstract:

In order to improve the methane adsorption capacity of adsorbent, the metal-organic frameworks material HKUST-1 was synthesized by solvothermal method and follow by modification research. The optimized synthesis conditions were as follows:n(Cu(NO3)2·3H2O):n(H3BTC):n(DMF):n(C2H5OH):n(H2O)=1.7:1:46:60:100, the crystallization temperature of 80℃ and the crystallization time of 24 h. The methane adsorption capacity of HKUST-1 was 11.9 mmol/g at 25℃. Acid ligand modification could increase the methane adsorption capacity of HKUST-1. When VHAc/Vsolvent=5.8%, the methane adsorption capacity of HAc-HK-1(5.8%) reached 12.6 mmol/g. Molecular simulation results show that the addition of acetic acid can regulate the pore structure of HKUST-1 crystal, increase the specific surface area and pore volume, and increase the methane adsorption capacity.

Key words: HKUST-1, metal-organic frameworks, methane, natural gas adsorption storage

摘要:

为提高吸附材料对甲烷的吸附容量,采用溶剂热法合成了金属有机骨架材料HKUST-1,并进行了改性研究。HKUST-1的优化合成工艺条件为:原料摩尔比n(Cu(NO32·3H2O):n(H3BTC):n(DMF):n(C2H5OH):n(H2O)=1.7:1:46:60:100,晶化温度为80℃,晶化时间24 h。合成HKUST-1在25℃、3.5 MPa下的甲烷吸附容量为11.9 mmol/g。乙酸改性HKUST-1可以提高甲烷吸附容量,当反应母液中VHAc/Vsolvent=5.8%时,合成HAc-HK-1(5.8%)的甲烷吸附容量达到12.6 mmol/g。分子模拟结果表明,加入乙酸可以调控HKUST-1晶体孔道结构,增大比表面积和孔容,提高甲烷吸附容量。

关键词: HKUST-1, 金属有机骨架材料, 甲烷, 天然气吸附储存

CLC Number: