Synthesis of Monometallic Ru/TiO2 Catalysts and Selective Hydrogenation of CO2 to Formic Acid in Ionic Liquid

We successfully synthesized user friendly, stable, agglomeration free monometallic Ru/Ti-x catalyst for ionic liquid mediated CO2 hydrogenation reaction. Two well defined methods (impregnation and deposition-precipitation) were used to prepare 2 wt% Ru/Ti 1-10 catalysts. Advance analytical techniques were applied for the characterization of Ru/Ti-x catalytic systems. A series of functionalized ionic liquids were synthesized and applied as a reaction medium not only for hydrogenation reaction but also as absorbent to solubilize CO2 gas and to anchor the formic acid (hydrogenation product). Such advance application of ionic liquid mediated Ru/Ti-x catalytic system offered the hydrogenation reaction in a more optimized way to achieve maximum selectivity (high TON/TOF value of formic acid) with the added advantage of eight times catalyst recycling. [GRAPHICS] .