Efficient separation of C_(4) olefins using tantalum pentafluor oxide anion-pillared hybrid microporous material  

作　　者：Bin Gao Zhaoqiang Zhang Jianbo Hu Jiyu Cui Liyuan Chen Xili Cui Huabin Xing 

机构地区：[1]Key Laboratory of Biomass Chemical Engineering of Ministry of Education,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310027,China [2]Hangzhou Global Scientific and Technological Innovation Center,Zhejiang University,Hangzhou 311215,China

出　　处：《Chinese Journal of Chemical Engineering》2022年第2期49-54,共6页中国化学工程学报（英文版）

基　　金：supported by Natural Science Foundation of Zhejiang Province(LR20B060001 and LZ18B060001);the National Natural Science Foundation of China(21725603,21938011),the Entrepreneur Team Introduction Program of Zhejiang(2019R01006);the Research Computing Center in College of Chemical and Biological Engineering at Zhejiang University.

摘　　要：With the increasing demand for synthetic rubber,the purification of 1,3-butadiene(C_(4)H_(6))is of great industrial significance.Herein,the successful removal of n-butene(n-C_(4)H_(8))and iso-butene(iso-C_(4)H_(8))from 1,3-butadiene(C_(4)H_(6))was realized by synthesizing a novel TaOF_(5)^(2-) anion-pillared ultramicroporous material TaOFFIVE-3-Ni(also referred to as ZU-96,TaOFFIVE=TaOF_(5)^(2-),3=pyrazine).Single-component adsorption isotherms show that TaOFFIVE-3-Ni can achieve the exclusion of n-C_(4)H_(8) and iso-C_(4)H_(8) in the low pressure region(0–30 kPa),and uptake C_(4)H_(6) with a high capacity of 92.78 cm^(3)·cm^(-3)(298 K and 100 kPa).The uptake ratio of C_(4)H_(6)/iso-C_(4)H_(8) on TaOFFIVE-3-Ni was 20.83(298 K and 100 kPa),which was the highest among the state-of-the-art adsorbents reported so far.With the rotation of anion and pyrazine ring,the pore size changes continuously,which makes smaller-size C_(4)H_(6) enter the channel while larger-size n-C_(4)H_(8) and iso-C_(4)H_(8) are completely blocked.The excellent breakthrough performance of TaOFFIVE-3-Ni shows great potential in industrial separation of C4 olefins.The specific adsorption binding sites within ZU-96 was further revealed through the modeling calculation.

关 键 词：Adsorptive separation C4 olefin 13-Butadiene Anion-pillared hybrid microporous material 

分 类 号：TQ221.223[化学工程—有机化工]