High CO2 /CH4 Selectivity of a Flexible Copper(II) Porous Coordination Polymer under Humid Conditions

Shin-Ichiro Noro; Ryotaro Matsuda; Yuh Hijikata; Yasutaka Inubushi; Sadamu Takeda; Susumu Kitagawa; Yukiko Takahashi; Masashi Yoshitake; Kazuya Kubo; Takayoshi Nakamura

doi:10.1002/cplu.201500278

High CO₂ /CH₄ Selectivity of a Flexible Copper(II) Porous Coordination Polymer under Humid Conditions

Chempluschem. 2015 Oct;80(10):1517-1524. doi: 10.1002/cplu.201500278. Epub 2015 Sep 3.

Authors

Shin-Ichiro Noro^{1

2

3

4}, Ryotaro Matsuda⁵, Yuh Hijikata⁶, Yasutaka Inubushi⁷, Sadamu Takeda⁸, Susumu Kitagawa⁵, Yukiko Takahashi¹, Masashi Yoshitake², Kazuya Kubo^{1

2}, Takayoshi Nakamura^{1

2}

Affiliations

¹ Research Institute for Electronic Science, Hokkaido University, Sapporo, 001-0020, Japan.
² Graduate School of Environmental Earth Science, Hokkaido University, Sapporo, 060-0810, Japan.
³ PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.
⁴ Creative Research Institute (CRIS), Hokkaido University, Sapporo, 001-0021, Japan.
⁵ Institute for Integrated Cell-Material Science (WPI-iCeMS), Kyoto University, Kyoto, 615-8510, Japan.
⁶ Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa-ku, Nagoya, 464-8602, Japan.
⁷ Synthesis Research Laboratory, Kurashiki Research Center, Kuraray Co. Ltd., Sakazu, Kurashiki, Okayama, 710-0801, Japan.
⁸ Division of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan.

PMID: 31973388
DOI: 10.1002/cplu.201500278

Abstract

The development of highly efficient CO₂ separation materials is very important for environmental preservation and energy conservation. Crystalline porous coordination polymers (PCPs)/metal-organic frameworks are one of a number of promising types of porous materials for CO₂ separation because of their controllable pore size, shape and surface function. Simultaneously, the unique structural flexibility of PCPs affords both high CO₂ selectivity and inexpensive regeneration. However, this family of materials suffers from the coexistence of water that destroys the framework of PCPs and its adsorption in the pores is greater than that of CO₂ , which results in a deterioration in CO₂ -separation performance. Herein, a flexible and hydrophobic Cu^II PCP that is stable towards water has been designed and synthesised. This PCP has extremely high adsorption selectivity for CO₂ over CH₄ , derived from its structural flexibility. Furthermore, the obtained water-tolerant flexible PCP, under CO₂ /CH₄ mixed-gas conditions, exhibits highly selective CO₂ adsorption over CH₄ , even in the presence of water.

Keywords: adsorption; carbon dioxide; hydrophobic effect; microporous materials; porous coordination polymers.

Abstract

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