Effect of Mn and Pb Promoters on the Performance of Cu/ZnO-Catalyst in CO<sub>2</sub> Hydrogenation to Methanol

The influences of Mn or Pb promoters on the catalytic performance of Cu/ZnO-SBA-15 catalyst in the methanol synthesis from CO2 hydrogenation were studied. The catalytic performances of the prepared catalysts were investigated in a stirred high pressure reactor under conditions of T = 483K, P = 2.25 MPa, and H2:CO2 = 3:1 (volume ratio). The experimental results showed that the promoted catalysts exhibited higher catalytic performance. The Mn promoted catalyst resulted in 36% of CO2 conversion and 67% of methanol selectivity, whereas the unpromoted catalyst showed 26% of CO2 conversion and 58% of methanol selectivity.

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