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ZSM-5/Y复合分子筛在烃类催化裂化催化剂中的应用研究 总被引:7,自引:1,他引:7
以大庆减压蜡油为原料,考察了水热脱铝ZSM-5/Y复合分子筛的催化裂化性能,并与经同样条件水热脱铝的ZSM-5和Y型沸石的机械混合分子筛进行了对比研究。结果表明,与机械混合样品相比,复合分子筛具有较大的柴油产率和气体产率,汽油产率降低。从复合分子筛结构和ZSM-5的择形催化两方面分析了复合分子筛和机械混合分子筛裂化性能差别的原因。复合分子筛的聚集体结构不利于大分子进入分子筛结构中进行裂化,有利于汽油组分的裂化。气体数据分析支持了复合分子筛的结构特点。 相似文献
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茂锆金属配合物在介孔分子筛MCM-41上的接枝研究 总被引:5,自引:0,他引:5
茂锆金属配合物在介孔分子筛MCM-41上共价接技的合成和表征研究,以纯硅的MCM-41为载体,首先用四氯化硅与之反应在MCM-41的表面生成一定量的Cl:Si-OSi(O—Si≡)3基团,然后再用过量的三甲基氯硅烷保护分子筛表面剩余的硅羟基,接下来再让所得材料依次和环戊二烯基钠、正丁基锂、四氯化锆反应,从而通过在同一个反应瓶中经过五步连续合成的方法,得到了二氯二茂锆共价接枝于介孔分子筛MCM-41表面的有机无机复合材料.用XRD、^29Si和^13C MAS NMR、氮气吸附-脱附孔径分析、IR光谱等手段对所得样品进行了表征,并与用担载方法获得的二氯二茂锆固载化于MCM-41之中的样品进行了对比分析研究. 相似文献
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Hailiang Yin Tongna Zhou Yunqi Liu Yongming Chai Chenguang Liu State Key Laboratory of Heavy Oil Processing Key Laboratory of Catalysis CNPC China University of Petroleum Qingdao Sh ong China 《天然气化学杂志》2011,(4):441-448
Two mixed-matrix NiMo/Al2O3 catalysts containing nano-and micro-sized zeolite Y have been prepared to explore the size effect of zeolite Y particle on the hydrodesulfurization(HDS)and hydrodenitrogenation(HDN)activities of fluid catalytic cracking(FCC)diesel.They were characterized by SEM,BET,XRD,H2-TPR,NH3-TPD and HRTEM.The results show that the catalyst containing nano-sized zeolite Y possesses larger average pore diameter,higher pore volume,weaker and lesser acid sites,more easily reducible metal phases,shorter MoS2 slabs and more slab layers than the catalyst containing micro-sized zeolite Y.The catalysts were also evaluated with a high-pressure fixed-bed reactor using real FCC diesel as feed.The results display that the catalyst containing nano-sized zeolite Y bears higher HDS and HDN activities and exhibits higher relative rate constant for the removal of total sulfur or nitrogen than the one containing micro-sized zeolite. 相似文献
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