【摘要】 研究表明,增加高硅Y型沸石中的金属离子含量,有助于降低FCC汽油中烯烃含量和硫含量。气相化学法能有效地提高金属离子在高硅Y型沸石中的交换度,其催化剂具有好的选择性氢转移活性。固定流化床评价结果表明,与常规水热法制备的USY催化剂相比,以大庆常压渣油为原料,汽油中烯烃含量可从对比剂的27.54％降至23.39％,而硫含量从1010mg/L降至756mg/L。同时还具有高的水热稳定性及焦炭选择性。原因在于气相化学法能制备出晶格完整、孔道畅通、具有较高金属离子含量的高硅Y型沸石,从而为制备降低汽油烯烃和硫含量催化剂的活性组元开辟了一条新途径。更多还原

【Abstract】 The research showed that the increase of metal content of high-silica Y zeolite was benefit to the reduction of the olefin and sulfur content in FCC naphtha. High-silica Y zeolite with higher metal content could be obtained by the gas phase preparation to efficiently raised the metal ion-ex- changed. High hydrothermal stability, good selective hydrogen-transfer activity and good coke selectivity of the prepared catalyst were observed. In comparison with the USY catalyst preparing by conventional hydrothermal treating, the evaluation result in a fixed-fluidized bed reactor with Daqing AR feedstock exhibited that the naphtha olefin content reduced from 27. 54% to 23. 39% , and the sulfur content decreased from 1010mg/L to 756mg/L. The gas phase prepared high-silica zeolite possessed higher metal content, unblock channels and perfect crystal, which opens a new route for preparing the active component of FCC catalyst for reducing the olefin and sulfur content in cracked naphtha.更多还原