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Eco-friendly upconversion of limestone into value-added calcium formate

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Abstract

Although CaCO3 is a naturally available, inexpensive, abundant and extensively used chemical in various industries, to date, most of its conversions liberate CO2 into the atmosphere, which accounts for about 5–6% of global anthropogenic CO2 emission. Herein, the first synthesis of calcium formate (CF) by hydrogenation of an aqueous mixture of CaCO3 and CO2 using a heterogeneous catalyst in an unconventional CO2 reducing manner is reported. The phosphine-based heterogenized Ru catalyst efficiently converts CaCO3 into CF with good selectivity (>99%) and is readily separated from the reaction product, resulting in promising recycling ability. Thus, this work provides a promising strategy for the design of green and sustainable conversion of carbonate minerals in industry.

Graphical abstract: Eco-friendly upconversion of limestone into value-added calcium formate

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Article information


Submitted
27 Mar 2020
Accepted
22 Jun 2020
First published
29 Jun 2020

Green Chem., 2020, Advance Article
Article type
Paper

Eco-friendly upconversion of limestone into value-added calcium formate

G. H. Gunasekar, H. Park, S. Padmanaban and S. Yoon, Green Chem., 2020, Advance Article , DOI: 10.1039/D0GC01089H

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