Production of formate from CO2gas under ambient conditions: Towards flow-through enzyme reactors

Abstract

A flow-through bi-enzymatic reactor was developed to produce formate from carbon dioxide gas (CO2). The reaction operates under ambient conditions without hydrogen gas (H2) and involves a high performance formate dehydrogenase from Methylobacterium extorquens AM1 (MeFoDH1). The tandem reaction features in situ regeneration of the nicotinamide adenine dinucleotide (1,4-NADH) cofactor performed by a highly active mutant of the phosphite dehydrogenase from Pseudomonas stutzeri, without any side reaction. One of the highest turnover numbers reported to date in the literature was reached (6700) giving a high space-time yield of 0.6 mmolformate min-1 L-1reactor.