New materials for storing flammable industrial gases

Date:
April 21, 2022
Source:
CNRS
Summary:
Engineers have just demonstrated a promising new family of materials
for storing flammable gases such as acetylene. These materials
are nanoporous and flexible and can be modified to improve the
adsorption of small molecules at the temperature and pressure
conditions required for industrial applications.



FULL STORY ==========================================================================
An international research team involving the CNRS, Air Liquide and the University of Kyoto (Japan) has just demonstrated the very promising capabilities of a new family of materials for storing flammable gases
such as acetylene. These materials are nanoporous and flexible and can be modified to improve the adsorption of small molecules at the temperature
and pressure conditions required for industrial applications. These
results were published on 21 April 2022 in Nature Chemistry.


==========================================================================
How do I store more, and better? This summarizes the challenge of
transporting flammable gases. To ensure industrial safety, these gases
must be handled at defined temperature and pressure conditions that
do not allow for optimal storage and release cycles. Existing porous
materials can facilitate the capture of certain gases, but their high
affinity for these molecules complicates their release: a large amount
of gas then remains trapped in the host material.

Scientists1 have just shown that new patented materials2 could provide
a solution, by demonstrating their ability to capture and release
acetylene. For a given volume, they can store and release 90 times more acetylene. In that step, it is even possible to recover 77% of the gas
stored in a cylinder -- far more than with existing porous materials. And
all this is at temperature and pressure conditions suitable for industrial applications.

These materials belong to the family of Metal-Organic frameworks (MOFs)
that form nanoporous crystal structures. The MOFs studied during this
work have the peculiarity of being flexible, and thus offer two states:
"open" and "closed," facilitating gas storage and release respectively. In addition, they can be modified to control the storage-release pressure
very finely, and thus be suitable for various industrial constraints.

Based on these results, the research team plans to test new modifications
to give these flexible MOFs novel properties, for example to facilitate
the capture of CO2, methane or hydrogen. Reducing the cost of these
new materials remains a major objective in order to develop industrial applications.

This research was carried out as part of the International Research
Project3 SMOLAB, which concentrates and reinforces complementary
French and Japanese strengths in the field of flexible MOFs and their applications. SMOLAB was created in 2018 by the University of Kyoto and
the CNRS, in partnership with avec Air Liquide, Claude Bernard University
Lyon 1, Chimie ParisTech / PSL University.

Notes 1- At the Institut de Recherche de Chimie Paris (CNRS/Chimie
ParisTech -- PSL).

2- Developed by the University of Kyoto and Air Liquide, reference WO2021043492A1.

3- TheInternational Research Projects are collaborative research projects established between one or more CNRS laboratories and laboratories in
one or two foreign countries. Through them established collaborations
are consolidated by short- or medium-term scientific partnerships. They
include working meetings and seminars, the development of joint research activities including field research, and the supervision of students.


========================================================================== Story Source: Materials provided by CNRS. Note: Content may be edited
for style and length.


========================================================================== Journal Reference:
1. Mickaele Bonneau, Christophe Lavenn, Jia-Jia Zheng, Alexandre
Legrand,
Tomofumi Ogawa, Kunihisa Sugimoto, Francois-Xavier Coudert, Regis
Reau, Shigeyoshi Sakaki, Ken-ichi Otake, Susumu Kitagawa. Tunable
acetylene sorption by flexible catenated metal-organic
frameworks. Nature Chemistry, 2022; DOI: 10.1038/s41557-022-00928-x ==========================================================================

Link to news story: https://www.sciencedaily.com/releases/2022/04/220421130954.htm

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