Chemical Industry and Engineering Progress ›› 2019, Vol. 38 ›› Issue (s1): 179-185.DOI: 10.16085/j.issn.1000-6613.2019-0683

• Materials science and technology • Previous Articles     Next Articles

Synthesis and the performance of Co-MOF-74 for n-hexane/1-hexene adsorption separation

LIU Lu1, REN Danni2, LIU Jisan1   

  1. 1 Hualu Engineering&Technology Co., Ltd., Xi'an 710065, Shaanxi, China;
    2 Petroleum Processing Research Center, East China University of Science and Technology, Shanghai 200237, China
  • Received:2019-04-29 Revised:2019-08-30 Online:2019-11-16 Published:2019-11-16

Co-MOF-74的合成及其吸附正己烷/1-己烯性能

刘露1, 任丹妮2, 刘继三1   

  1. 1 华陆工程科技有限责任公司, 陕西 西安 710065;
    2 华东理工大学石油加工研究所, 上海 200237
  • 通讯作者: 刘露(1986-),女,硕士,工程师。
  • 作者简介:刘露(1986-),女,硕士,工程师。E-mail:ll2359@hlet.com。

Abstract: Co-MOF-74 was synthesized through solvothermal process. Samples were characterized by using XRD, N2 adsorption, FTIR, TG-DSC and SEM. In addition, the adsorption performances for n-hexane/1-hexene were evaluated. The optimal synthesis conditions were observed as follows:the ratio of raw materials of n[Co (NO3) 2·6H2O]:n (DHTP):n (THF):n (H2O)=2:1:165:750, crystallization temperature of 100℃, crystallization time of 24h, activation temperature of 150℃, activation time of 2h. It is indicated that synthesized Co-MOF-74 has static adsorption capacities of 125.6mg/g and 72.9mg/g for 1-hexene and n-hexane, respectively. The BET specific surface area, pore volume and average micropore size are 1209m2/g, 0.41cm3/g and 0.66nm, respectively. The maximum adsorption amount is determined to be around 130mg/g at adsorption temperature range of 283K to 313K. Furthermore, the adsorption isotherms for 1-hexene on Co-MOF-74 can be explained by using L-F model very well. 1-hexene adsorption onto Co-MOF-74 is confirmed to be a spontaneous exothermic process.

Key words: synthesis, adsorption, alkane, separation

摘要: 采用溶剂热方法合成了Co-MOF-74,采用X射线衍射(XRD)、氮气吸附、红外光谱(FTIR)、热重-差热分析(TG-DSC)和扫描电子显微镜(SEM)对其进行表征,研究其吸附正己烷/1-己烯性能。结果表明,优化的Co-MOF-74合成工艺条件为:原料配比n[Co(NO32·6H2O]:n(DHTP):n(THF):n(H2O)=2:1:165:750,晶化温度100℃,晶化时间24h,150℃活化2h。合成Co-MOF-74对1-己烯和正己烷的静态饱和吸附量分别为125.6mg/g和72.9mg/g,BET比表面积为1209m2/g,孔体积为0.41cm3/g,微孔平均孔径为0.66nm。L-F吸附模型能较好地解释Co-MOF-74材料对1-己烯的吸附等温线数据,Co-MOF-74吸附1-己烯的过程是热力学自发放热过程。

关键词: 合成, 吸附, 烷烃, 分离

CLC Number: 

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