论文部分内容阅读
在水热条件下合成了包覆型MCM-41-HY复合分子筛.采用XRD、N2气吸附和SEM等方法对其进行了表征.结果表明,MCM-41-HY复合分子筛和MCM-41与H型Y沸石(HY)的机械混合物明显不同,在复合分子筛MCM-41-HY中,中孔相MCM-41附晶生长在HY沸石上,将HY包覆起来.以二苯并噻吩为模型化合物,考察了该材料担载NiMo催化剂的加氢脱硫活性.结果表明,MCM-41-HY复合分子筛与MCM-41和HY的机械混合物担载NiMo催化剂的加氢脱硫(HDS)活性相当,但MCM-41-HY复合分子筛担载NiMo催化剂的裂化活性较低.其裂化活性不同的原因在于其载体孔道结构和酸性位的分布不同.
The MCM-41-HY composite molecular sieve was synthesized under hydrothermal conditions and characterized by XRD, N2 gas adsorption and SEM etc. The results show that MCM-41-HY composite zeolite and MCM-41 and H In the composite zeolite MCM-41-HY, the mesoporous MCM-41 crystallite grows on HY zeolite and the HY is coated with dibenzothiophene as a model compound , The hydrodesulfurization activity of the NiMo catalyst was investigated.The results showed that the HDS activity of MCM-41-HY composite zeolite supported by NiMo catalyst was similar to the mechanical mixture of MCM-41 and HY, but MCM -41-HY composite zeolite supported NiMo catalyst has lower cracking activity, and its cracking activity is different because of its different pore structure and acidic sites.