Study On Novel Catalysts For Higher Alcohols Synthesis From CO Hydrogenation

As alternative energy resources and raw chemicals, the higher alcohols synthesis from syngas via CO hydrogenation was extensively studied. This dissertation investigated the copper-cobalt based catalysts for higher alcohols synthesis, rhodium based catalysts for higher oxygenates synthesis, and copper-chromium based catalysts for methanol synthesis in slurry phase. The characterizations as BET, TPR, XRD, H₂-TPD, CO-TPD, TEM, XPS, and ESR were utilized to reveal the textural and structural properties, the adsorption capacity to reactants, and the surface compositions of the catalysts etc. Meanwhile, effects of promoters, active components, preparation process as well as reaction parameters on the catalytic performance were studied. The catalytic mechanism of CO hydrogenation for higher alcohols synthesis was discussed and provided the proofs for the theoretical and practical application.Glow discharge plasma, which was introduced in the preparation of copper-cobalt based catalysts, induced an decrease in catalysts crystallize mean size, and an increase in active components dispersion as well as the formation of active centers. Consequently, the surroundings of active components were modified, the reduction and the adsorption properties were improved. CCA-PH100, treated with appropriate intensity and atmosphere in plasma, performed better for higher alcohols synthesis.The promotion of additives was approved for improvement in catalytic performance. Zirconia existed as amorphous phase in copper-cobalt based catalysts,...