文献类型：期刊文献

英文题名：Enhanced adsorption selectivity of 1-hexene/n-hexane mixtures in Cu-BTC metal-organic framework by acid modification

作者：Zhu, Feifei[1];Pu, Xin[1];Wang, Xin[2];Xu, Youhao[2];Liu, Jichang[1,3];Li, Jiangbing[3];Li, Renjie[1];Han, Xin[1];Qian, Jiayu[1];Xu, Haitao[1];Mu, Bin[4]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]SINOPEC Res Inst Petr Proc, Beijing 100083, Peoples R China;[3]Shihezi Univ, Sch Chem & Chem Engn, Key Lab Green Proc Chem Engn Xinjiang Bingtuan, Shihezi 832003, Peoples R China;[4]Arizona State Univ, Sch Engn Matter Transport & Energy, 501 East Tyler Mall, Tempe, AZ 85287 USA

年份：2022

卷号：337

外文期刊名：MICROPOROUS AND MESOPOROUS MATERIALS

收录：;EI(收录号：20221712012870);WOS:【SCI-EXPANDED(收录号:WOS:000821462700004)】；

基金：We would like to acknowledge financial support from National Natural Science Foundation of China (Project U1862204, 22008070).

语种：英文

外文关键词：Cu-BTC; 1-Hexene; n-hexane; Adsorption separation; Acid modification

摘要：Effective separation of olefins from hydrocarbon mixtures can provide more high-quality feed for steam cracking to produce ethylene and propylene. In this paper, metal organic framework material Cu-BTC (BTC = benzene1,3,5-tricarboxylic acid) was optimally synthesized by solvothermal method and the effects of synthesis condition on the adsorption capacity were investigated. The adsorption capacities of 1-hexene and n-hexane at 298 K were 122.31 mg/g (1.45 mmol/g) and 18.95 mg/g (0.22 mmol/g) respectively, and the selectivity was 6.45. Furthermore, by introducing acetic acid in the synthesis, three acetic groups replace one BTC linker to combined with the Cu paddlewheel clusters in the Cu-BTC skeleton, giving stronger attraction to carbon-carbon double bonds and improving the BET specific surface area, increasing from 859 m(2) g(-1) to 1297 m(2 )g(-1) . The adsorption capacity of 1-hexene was increased. Meanwhile, the adsorption of n-hexane was restrained. When n (H3BTC): n (AcOH) = 1:0.8, the BET specific surface area of the modified Cu-BTC reached 1297 m(2)/g. The adsorption capacity of 1-hexene and n-hexane were 187.90 mg/g (2.23 mmol/g) and 10.75 mg/g (0.12 mmol/g), respectively. The selectivity increased to 17.48. Furthermore, the modified Cu-BTC exhibited excellent performances for the separation of C-7 and C-8 olefin/paraffin mixtures.