Direct synthesis of formic acid by partial oxidation of methane on H-ZSM-5 solid acid catalyst
The direct synthesis of formic acid by partial oxidation of methane was studied using hydrogen peroxide (H2O2) as oxidant with keeping reaction temperature of 373 K and a pressure of 2.6 MPa. High yield (13.0%) and selectivity (66.8%) of formic acid (HCOOH) an important oxygenated compound in chemical industry were achieved using protonated pentasil-type zeolite (H-ZSM-5) as a solid acid catalyst. Tryphenylphosphene(Ph3P) was used as a promoter in reaction system. A fairly large amount of CO2 was also observed as deep oxidation product.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► Direct synthesis of formic acid through partial oxidation of methane. ► H2O2 was used as green oxidizing agent. ► High yield (13.0%) and selectivity (66.8%) of formic acid (HCOOH) was achieved. ► Protonated pentasil-type zeolite (H-ZSM-5) was used an active solid acid catalyst. ► The acid site of the catalyst seems to be the active site for partial oxidation.
Journal: Catalysis Communications - Volume 12, Issue 13, 26 July 2011, Pages 1198–1200