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Efficient Separation of Acetylene and Carbon Dioxide in a Decorated Zeolite
Author(s) -
Liu Shanshan,
Han Xue,
Chai Yuchao,
Wu Guangjun,
Li Weiyao,
Li Jiangnan,
Silva Ivan,
Manuel Pascal,
Cheng Yongqiang,
Daemen Luke L.,
RamirezCuesta Anibal J.,
Shi Wei,
Guan Naijia,
Yang Sihai,
Li Landong
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202014680
Subject(s) - acetylene , carbon dioxide , faujasite , adsorption , desorption , materials science , carbon fibers , molecule , chemical engineering , chemistry , zeolite , organic chemistry , catalysis , composite material , composite number , engineering
The almost identical molecular sizes and volatilities of acetylene and carbon dioxide make their separation extremely challenging in industry. Reported here is the efficient separation of acetylene and carbon dioxide (v/v=2/1, which is relevant to that in the industrial cracking stream) in faujasite zeolites decorated with atomically‐dispersed copper(II) sites under ambient conditions. In situ neutron powder diffraction and inelastic neutron scattering confirm that the confined copper(II) site displays chemoselective yet reversible binding to acetylene, whereas adsorbed carbon dioxide molecules are stabilized by weak host–guest supramolecular interactions with the framework oxygen centers, thus resulting in the efficient separation of these two gases under flow conditions. A designed adsorption‐purging‐desorption system based upon Cu@FAU is established for the recovery of high purity acetylene (98–99 %) from the mixture of acetylene and carbon dioxide, offering an unprecedented separation factor of 22.2 with an effective dynamic uptake of acetylene of 1.51 mmol g −1 at 298 K.