Conversion of CO₂ from Air into Methanol Using a Polyamine and a Homogeneous Ruthenium Catalyst

Abstract

A highly efficient homogeneous catalyst system for the production of CH3OH from CO2 using pentaethylenehexamine and Ru-Macho-BH (1) at 125-165 °C in an ethereal solvent has been developed (initial turnover frequency = 70 h(-1) at 145 °C). Ease of separation of CH3OH is demonstrated by simple distillation from the reaction mixture. The robustness of the catalytic system was shown by recycling the catalyst over five runs without significant loss of activity (turnover number > 2000). Various sources of CO2 can be used for this reaction including air, despite its low CO2 concentration (400 ppm). For the first time, we have demonstrated that CO2 captured from air can be directly converted to CH3OH in 79% yield using a homogeneous catalytic system.

A spongy nickel-organic CO 2 reduction photocatalyst for nearly 100% selective CO production

“…When designing catalysts for CO 2 reduction, the material’s ability to capture the CO 2 molecules is another significant consideration ( 24 ). Metal-organic frameworks (MOFs) with high surface area and tunable pores have been used for gas capture and heterogeneous catalysis ( 25 , 26 ).…”

Carbon Dioxide to Methanol: The Aqueous Catalytic Way at Room Temperature

“…[5] The group of Sasaki firstly obtained methanol, methane and CO from homogeneous CO 2 hydrogenation with Ru 3 (CO) 12 at 240 8C. [7][8][9][10][11][12][13][14] Commonf eatures of these works wereh igh temperatures (over 100 8C), the employment of organic solvents, and, in certain cases, low selectivities. [7][8][9][10][11][12][13][14] Commonf eatures of these works wereh igh temperatures (over 100 8C), the employment of organic solvents, and, in certain cases, low selectivities.…”

Homogeneously catalysed conversion of aqueous formaldehyde to H2 and carbonate

“…1). Catalyst A (M=Ru) and analogues catalyse also the back-reaction, that is, the hydrogenation of CO 2 to methanol with turnover (TON) of >2000 (refs 17, 18). [Co(triphos)(OOCR)](BF 4 ) also catalyses the hydrogenation of carboxylic acids to alcohols and water, including formic acid (TON>200)19.…”