Science & Technology

New research has found a way to scrape carbon dioxide from factory emissions and make useful products

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Carbon dioxide is harvested from the chimney and can be used to create commercially valuable chemicals, thanks to a new compound developed by a scientific collaborative study led by researchers at Oregon State University.

Published on Journal of Materials Chemistry A, Studies show a new metal-organic framework with common industrial chemicals, Propylene oxide, Can catalyze the formation of cyclic carbonates while scrubbing CO2 From factory flue gas.

Carbon dioxide, a greenhouse gas, is produced by the burning of fossil fuels and is one of the leading causes of climate change. Cyclic carbonates are a class of compounds of great industrial interest. This means that useful products such as battery electrolytes and pharmaceutical precursors can be derived from the same process developed to purify emissions from manufacturing facilities, so the findings support a green economy initiative. ..

A new three-dimensional lanthanide-based metal-organic framework (MOF) can also be used to catalyze cyclic carbonate formation from biogas. carbon dioxide, Methane and other gases resulting from the decomposition of organic matter.

Catalysts are substances that speed up chemical reactions without causing permanent chemical changes in their own right, and lanthanides are a group of soft, silver-white metals that range from night vision goggles to flint for cigarette lighters. ..

Examples of lanthanides include cerium, europium and gadolinium.

“By developing an effective catalyst, we have taken a major step towards solving the promising critical challenges associated with the circulating carbon economy,” said Kyriakos Stylianou, a chemist at the University of OSU Science who led the study. Says. “The key is to understand the molecular interactions between the active site of MOF and potentially reactive molecules.”

MOF is an inorganic-organic hybrid, a crystalline porous material composed of positively charged metal ions surrounded by organic “linker” molecules (in this case, lanthanide metal and tetracarboxylic dianlinker).

Metal ions form nodes that connect the linker arms, forming a cage-like repeating structure. The structure has nano-sized pores that adsorb gas like a sponge. MOFs can be designed with various components that determine the characteristics of MOFs.

According to Stylianou, lanthanide-based materials are generally stable due to the relatively large size of the lanthanide ions. This also applies to lanthanide MOFs, where acidic metals form strong bonds with the linker and keep the MOF stable in water and at high temperatures. It’s important Flue gas Biogas is hot and rich in water.

Lantanide MOF is also selective for carbon dioxide. In other words, you will not be bothered by the presence of other gases in industrial emissions. Biogas..

“In the pores, we observed that propylene oxide could bind directly to the cerium center and activate the cycloaddition reaction interaction of carbon dioxide,” says Stylianou. “We will discuss the fixation of carbon dioxide to the epoxy ring of propylene oxide to produce cyclic carbonate using a MOF that is stable after multiple captures and conversions of carbon dioxide.”

Cyclic carbonates have a wide range of industrial uses, including protic solvents, precursors for polycarbonate materials such as spectacle lenses and digital discs, electrolytes for lithium batteries, and precursors for pharmaceuticals.

“These are very exciting discoveries,” said Stylianou. “And the direct use of carbon dioxide from an impure source saves the cost and energy of separating it before it is used to make circulating carbonate, which benefits the green economy. Probably. “

David Le, Ryan Loughran, and Isabelle Brooks of the Faculty of Science cooperated in this study, as scientists at Columbia University and the University of Cambridge did.

Improving stability in the presence of water may help reduce greenhouse gas chimney emissions

For more information:
David H. Le et al, Lantanide Metal-Organic Framework for Fixation of CO2 under Aqueous Rich and Mixed Gas Conditions, Journal of Materials Chemistry A (2021). DOI: 10.1039 / D1TA09463G

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New research has found a way to scrape carbon dioxide from factory emissions and make useful products New research has found a way to scrape carbon dioxide from factory emissions and make useful products

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