论文部分内容阅读
用浸渍法制备以KCl为助剂的ZrO_2、γ-Al_2O_3和SiO_2负载硫化态钼基催化剂,研究了钼和助剂钾两种组分浸渍顺序、助剂含量、载体差别以及浸渍溶液的酸碱性对催化剂上CO加氢合成低碳混合醇性能的影响。ZrO_2按先钼后钾、γ-Al_2O_3和SiO_2则按相反的顺序浸渍两种组分、且K/Mo原子比分别为0.5,0.8和1.0制备催化剂,其合成醇活性最佳。由于载体性质的差异,K-Mo/SiO_2、特别是K-Mo/ZrO_2的合成醇活性强烈依赖于钾助剂含量。而K-Mo/SiO_2在较宽的钾含量范围内,其活性差别不明显。适当选择较高碱性的浸渍溶液制备K-Mo/γ-Al_2O_3催化剂,有利于醇活性的提高。
The molybdenum-based and molybdate-supported molybdenum sulfide catalysts were prepared by impregnation method using ZrCl 2, γ-Al 2 O 3 and SiO 2 as additives. The impregnation sequence, Effect of Properties on the Performance of Low - carbon Mixed Alcohols Prepared by CO Hydrogenation over. ZrO_2 was pre-molybdenum and potassium, γ-Al 2 O 3 and SiO 2 were impregnated in the reverse order of the two components, and K / Mo atomic ratio of 0.5, 0.8 and 1.0 for the preparation of the catalyst, the best synthesis of alcohol activity. Due to the differences in the nature of the carriers, the activity of the synthetic alcohols of K-Mo / SiO 2, especially K-Mo / ZrO 2, strongly depends on the content of potassium aids. The K-Mo / SiO 2 in a wide range of potassium content, the activity difference is not obvious. Appropriate selection of higher alkaline impregnation solution prepared K-Mo / γ-Al 2 O 3 catalyst, is conducive to the improvement of alcohol activity.