Enhanced one-step purification of C2H4 from C2H2/C2H4/C2H6 mixtures by fluorinated Zr-MOF

被引：19
|
作者：
Liu, Jiaqi [1 ]
Miao, Jiafeng [1 ]
Wang, Hao [1 ,4 ]
Gai, Yanli [2 ,5 ]
Li, Jing [1 ,3 ,4 ]
机构：
[1] Shenzhen Polytech, Hoffmann Inst Adv Mat, Shenzhen, Guangdong, Peoples R China
[2] Jiangsu Normal Univ, Sch Chem & Mat Sci, Xuzhou, Jiangsu, Peoples R China
[3] Rutgers State Univ, Dept Chem & Chem Biol, Piscataway, NJ USA
[4] Shenzhen Polytech, Hoffmann Inst Adv Mat, 7098 Liuxian Blvd, Shenzhen 518055, Guangdong, Peoples R China
[5] Jiangsu Normal Univ, Sch Chem & Mat Sci, Xuzhou 221116, Jiangsu, Peoples R China
来源：
AICHE JOURNAL | 2023年 / 69卷 / 06期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
adsorptive separation; ethylene purification; ethylene; ethane; acetylene separation; metal-organic frameworks; METAL-ORGANIC FRAMEWORKS; THERMAL-CRACKING; SEPARATION; ETHYLENE; HYDROCARBONS; ADSORPTION; OLEFINS; GAS;
D O I：
10.1002/aic.18021
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The extraction of C2H4 from C2H6/C2H4/C2H2 mixtures is of great significance in the chemical industry for C2H4 production but the process remains challenging due to the similarity of these C-2 hydrocarbon species in their molecular size and physical properties. Here, we report the fluorination of a stable Zr-MOF, UiO-66, to fine-tune the pore dimensions and pore functionality. In particular, UiO-66-CF3 shows notably preferential adsorption of C2H6 and C2H2 over C2H4, with C2H2/C2H4 and C2H6/C2H4 selectivities of 1.4 and 1.9, respectively. Theoretical calculations provide insight into the binding sites of UiO-66-CF3 for C-2 hydrocarbon adsorption. Breakthrough experiments further confirmed the capability of the material for purification of C2H4 from C2H2/C2H4/C2H6 ternary mixtures, evidenced by the high purity C2H4 (99.9%+) obtained directly from outlet gas.
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页数：8
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