The synthesis of methanol from CO/CO2/H2 gas over Cu/Ce1-xZrxO2 catalysts
- The synthesis of methanol from CO/CO2/H2 gas over Cu/Ce1-xZrxO2 catalysts
- 유천재; 이대원; 김민성; 문동주; 이관영
- Methanol synthesis; Synthesis gas; CexZr1-xO2; Cu surface area; Oxygen vacancy
- Issue Date
- Journal of molecular catalysis A, Chemical
- VOL 378, 255-262
- In this study, we investigated the catalysis of Cu/Ce1−xZrxO2for the synthesis of methanol from CO/CO2/H2gas. The Ce1−xZrxO2was synthesized by a surfactant (CTAB)-assisted co-precipitation method to yieldhigh surface area supports, and Cu was deposited on the supports by a deposition–precipitation methodto promote high Cu dispersion. The incorporation of Zr into the CeO2lattice transformed the structureinto a defective, pseudo-cubic one and the amount of incorporated Zr (x) determined the concentration ofoxygen vacancy in the lattice. It was proposed that the oxygen vacancy in Ce1−xZrxO2played an importantrole in the catalysis by determining concentration and mobility of the adsorbed COxon the catalyst. Theactivity was also influenced by the exposed surface area of Cu and surface acidity of the catalyst, bothof which were closely related to the amount of Zr in the support. To reveal the influences of the catalystproperties on methanol production, various characterization techniques were used, such as XPS, Ramanspectroscopy, XRD, H2-TPR, NH3-TPD, BET and N2O titration methods.
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