Results
Title

Enhanced one‐step purification of C<sub>2</sub>H<sub>4</sub> from C<sub>2</sub>H<sub>2</sub>/C<sub>2</sub>H<sub>4</sub>/C<sub>2</sub>H<sub>6</sub> mixtures by fluorinated Zr‐MOF.

Authors

Liu, Jiaqi; Miao, Jiafeng; Wang, Hao; Gai, Yanli; Li, Jing

Abstract

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 C2 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 C2 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.

Subjects

MOLECULAR size; CHEMICAL industry; BINDING sites; MANUFACTURING processes; ADSORPTIVE separation

Publication

AIChE Journal, 2023, Vol 69, Issue 6, p1

ISSN

0001-1541

Publication type

Academic Journal

DOI

10.1002/aic.18021