MCM-41-HY介-微孔复合分子筛的水热合成及应用

 以微孔HY浆液为母液，合成了一种介-微孔复合分子筛HY/MCM-41。通过XRD,BET，NH3-TPD等手段对复合材料进行了表征，并对复合分子筛的水热稳定性进行了考察。结果表明，复合材料同时具有中孔分子筛MCM-41和微孔HY型沸石的特点，并且和纯MCM-41分子筛相比，复合分子筛的酸性明显增强，并且水热稳定性提高。利用一段串联加氢裂化工艺，考察了复合分子筛的催化性能。200ml固定床加氢装置评价结果表明，在控制原料>350℃馏分油转化率为75%的条件下，加氢裂化生成油C5+液收为98.51%，最大量柴油馏分的收率为69.09%，中油选择性80.5%，能满足工业装置最大量生产柴油的需要。

SYNTHESIS AND APPLICATION OF MCM-41-HY COMPOSITE ZEOLITE WITH MESOPOROUS AND MICROPOROUS STRUCTURE

A new micro-mesoporous MCM-41-HY composite molecular sieve was prepared with HY zeolite as the mother liquor.The synthesized composite sample was characterized by XRD, NH_3-TPD, N_2 adsorption and desorption.In addition, its hydrothermal stability was investigated.The catalytic performance of the composite zeolite was studied on a 200 mL fixed-bed hydrogenation unit with the mixed oil of Daqing VGO and CGO as the feedstock.The results showed that the MCM-41-HY composite molecular sieve had the properties of both mesoporous MCM-41 and the microporous HY, and had stronger acid strength and higher hydrothermal stability than pure mesoporous MCM-41.Under the 75% conversion of >350℃ feedstock distillate, C_(5+) liquid yield of 98.51% was obtained.The yield of maximum diesel distillate and the selectivity of middle distillates were 69.09% and 80.5%, respectively, which could meet the requirement on maximum diesel distillate yield in oil refinery.