含IM-5分子筛的催化裂化催化剂的反应性能

IM-5分子筛是一种具有中等孔径的三维孔道分子筛。通过对其老化后的分子筛结构和酸性特征分析发现,IM-5分子筛具有一定量的中孔,较强的酸性和较高的B酸比例,具有应用于FCC催化剂的结构和酸性基础。将含有IM-5分子筛的催化剂进行混合模型化合物催化裂化实验,发现其具有提高转化率和提高低碳烯烃收率的作用。以某加氢蜡油(HVGO)为原料油的催化裂化ACE评价结果也表明,引入新催化材料IM-5分子筛后,裂化HVGO原料的转化率增加约4.5百分点,液化气收率提高5百分点以上,汽油收率略有下降,轻循环油、油浆、焦炭收率均下降1百分点左右。因此IM-5是一种具有工业应用前景的中孔分子筛。

PERFORMANCE OF CATALYTIC CRACKING CATALYST CONTAINING IM-5 ZEOLITE

IM-5 molecular sieve possesses 3D medium pore structure with certain amount of mesoporous, strong acidity and higher ratio of B acid and can be used as a component of FCC catalyst. The experiments indicate that the catalyst with IM-5 sieve can improve the conversion and the low olefin yield. The results of ACE evaluation of catalytic cracking with HVGO as feedstock show that the conversion of HVGO increases by 4.5 percent points, and that the LPG yield is 5% more than that of the catalyst without IM-5. The yield of light cycle oil, slurry and coke each decreases 1%. Thus IM-5 is a mesoporous molecular sieve with industrial application prospect.