不同晶粒大小Beta分子筛对加氢改质催化剂性能的影响

INFLUENCE OF CRYSTAL SIZE OF BETA ZEOLITE ON PERFORMANCE OF HYDROUPGRADING CATALYST

合成了3种不同晶粒大小的改性Beta分子筛;以拟薄水铝石和不同晶粒大小的改性Beta分子筛为载体,采用浸渍法制备相应的加氢改质催化剂;对改性Beta分子筛的物化性质进行表征;在微反装置上以四氢萘为原料,对3种加氢改质催化剂的选择性开环性能进行考察;在200mL加氢装置上,以催化裂化柴油为进料,评价3种加氢改质催化剂的催化性能。结果表明:以较小晶粒Beta分子筛制备的催化剂具有较高的比表面积,有效增加了催化剂的加氢活性位;采用小晶粒Beta分子筛制备的催化剂具有较高的四氢萘转化率和催化裂化柴油加氢改质性能。

Beta zeolite is commonly used as an active component in catalyst. The effect of crystal size of Beta zeolite on the hydroupgrading catalyst performance for FCC LCO was studied. Three Ni-Mo catalysts supported on mixture of Al2O3 and Beta zeolites with different crystal size were prepared by impregnation. The catalysts were characterized by XRD and BET methods and evaluated in a micro-reac- tor using tetralin as a model compound for selective ring opening performance. And a 100 mL hydrogen- ation unit was used for the catalytic performance test using FCC LCO as feedstock. It is found that the catalyst made from smaller crystal size Beta zeolite has higher external surface area and more hydrogena- tion activity sites, resulting in higher tetralin conversion and better .hydroupgrading performance for FCC LCO.