4.8 Article

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

Journal

GREEN CHEMISTRY
Volume 22, Issue 15, Pages 4995-5001

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d0gc01089h

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Funding

  1. C1 Gas Refinery Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning, Republic of Korea [2018M3D3A1A01018006]
  2. National Research Foundation of Korea [2018M3D3A1A01018006] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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Although CaCO(3)is a naturally available, inexpensive, abundant and extensively used chemical in various industries, to date, most of its conversions liberate CO(2)into the atmosphere, which accounts for about 5-6% of global anthropogenic CO(2)emission. Herein, the first synthesis of calcium formate (CF) by hydrogenation of an aqueous mixture of CaCO(3)and CO(2)using a heterogeneous catalyst in an unconventional CO(2)reducing manner is reported. The phosphine-based heterogenized Ru catalyst efficiently converts CaCO(3)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.

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