STUDIES ON PRECIPITATED Cu-BASED CATALYST FOR METHANOL SYNTHESIS IL CATALYST COMPOSITION AND PREPARA

• 出 处: Journal of Natural Gas Chemistry
• 发表日期: 1995年04期
• 关键词: latter adding explained Roberts molar Simmons SSSC 沈时 restrained Griffin

Several series Cll-based catalysts prepared by one-step parallelflow coprecipitation or tow-step coprecipitation methods were investigated. The results mainly indicate that the optimum Cu/Zn ratio changes withpreparation method. Both the optimum Cu/Zn ratio and the activity of thecatalyst prepared by the former are higher than those of tbe catalyst preparedby the latter. which can be explained by their XRD patterns. When calcinedat high temperature. the catalyst shows very poor activitv. which is discussedin detail. Adding MnO_2 to the catalyst Cu-ZnO-Al_2O_3. the thermal stability is improved greatly. while adding CdO, the activity declines.

Several series Cll-based catalysts prepared by one-step parallelflow coprecipitation or tow-step coprecipitation methods were investigated. The results mainly indicate that the optimum Cu / Zn ratio changes withpreparation method. Both the optimum Cu / Zn ratio and the activity of thecatalyst prepared by the former are higher than those of tbe catalyst preparedby the latter. which can be explained by the catalyst preparedby the latter. which calcinedat high temperature. the catalyst shows very poor activitv. the thermal stability is improved greatly. while adding CdO, the activity declines.