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

作者：Jiaqi Liu, Jiafeng Miao, Hao Wang, Yanli Gai, Jing Li · 发表于：AIChE Journal · 年份：2023 · DOI：10.1002/aic.18021 · 被引用次数：31 · 研究领域：Metal-Organic Frameworks: Synthesis and Applications、Inorganic Fluorides and Related Compounds、Boron and Carbon Nanomaterials Research

Abstract The extraction of C 2 H 4 from C 2 H 6 /C 2 H 4 /C 2 H 2 mixtures is of great significance in the chemical industry for C 2 H 4 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‐CF 3 shows notably preferential adsorption of C 2 H 6 and C 2 H 2 over C 2 H 4 , with C 2 H 2 /C 2 H 4 and C 2 H 6 /C 2 H 4 selectivities of 1.4 and 1.9, respectively. Theoretical calculations provide insight into the binding sites of UiO‐66‐CF 3 for C 2 hydrocarbon adsorption. Breakthrough experiments further confirmed the capability of the material for purification of C 2 H 4 from C 2 H 2 /C 2 H 4 /C 2 H 6 ternary mixtures, evidenced by the high purity C 2 H 4 (99.9%+) obtained directly from outlet gas.