Volume 133, Issue 12 pp. 6600-6606
Forschungsartikel

Efficient Separation of Acetylene and Carbon Dioxide in a Decorated Zeolite

Shanshan Liu

Shanshan Liu

School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin, 300350 China

These authors contributed equally to this work.

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Dr. Xue Han

Dr. Xue Han

Department of Chemistry, The University of Manchester, Manchester, M13 9PL UK

These authors contributed equally to this work.

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Dr. Yuchao Chai

Dr. Yuchao Chai

School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin, 300350 China

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Prof. Guangjun Wu

Prof. Guangjun Wu

School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin, 300350 China

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Weiyao Li

Weiyao Li

Department of Chemistry, The University of Manchester, Manchester, M13 9PL UK

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Dr. Jiangnan Li

Dr. Jiangnan Li

Department of Chemistry, The University of Manchester, Manchester, M13 9PL UK

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Dr. Ivan da Silva

Dr. Ivan da Silva

ISIS Facility, STFC, Rutherford Appleton Laboratory, Chilton, Oxfordshire, OX11 0QX UK

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Dr. Pascal Manuel

Dr. Pascal Manuel

ISIS Facility, STFC, Rutherford Appleton Laboratory, Chilton, Oxfordshire, OX11 0QX UK

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Dr. Yongqiang Cheng

Dr. Yongqiang Cheng

Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN, 37831 USA

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Dr. Luke L. Daemen

Dr. Luke L. Daemen

Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN, 37831 USA

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Dr. Anibal J. Ramirez-Cuesta

Dr. Anibal J. Ramirez-Cuesta

Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN, 37831 USA

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Prof. Wei Shi

Prof. Wei Shi

College of Chemistry, Nankai University, Tianjin, 300071 China

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Prof. Naijia Guan

Prof. Naijia Guan

School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin, 300350 China

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Dr. Sihai Yang

Corresponding Author

Dr. Sihai Yang

Department of Chemistry, The University of Manchester, Manchester, M13 9PL UK

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Prof. Landong Li

Corresponding Author

Prof. Landong Li

School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin, 300350 China

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First published: 23 December 2020
Citations: 17

Dedicated to the 100th anniversary of Chemistry at Nankai University

Abstract

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.

Conflict of interest

The authors declare no conflict of interest.

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