Continuous-Flow Hydrogenation of Carbon Dioxide to Pure Formic Acid using an Integrated scCO2 Process with Immobilized Catalyst and Base


  • Part of this work was performed with support of the project CO2RRECT (01RC1006B) funded by the German Ministry of Education and Research (BMBF) and the Government of North Rhine-Westphalia in the research network SusChemSys (005-1112-0002). Generous donation of QuadraPure by Johnson Matthey and fruitful discussion with Dr. Giancarlo Franciò is gratefully acknowledged.


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Dual role for CO2: Pure formic acid can be obtained continuously by hydrogenation of CO2 in a single processing unit (see scheme). An immobilized ruthenium organometallic catalyst and a nonvolatile base in an ionic liquid (IL) are combined with supercritical CO2 as both reactant and extractive phase.