Synthesis of ITQ-2 zeolite under static conditions and its properties

查看全文 作　　者：LIU Baijun HUO Huijuan MENG Qingmin GAO [1]Shansong

机构地区：[1]Key Laboratory of Catalysis of China National Petroleum Corporation, China University of Petroleum, Beijing 102249, China Key Laboratory of Catalysis of China National Petroleum Corporation, China University of Petroleum, Beijing 102249, China Key Laboratory of Catalysis of China National Petroleum Corporation, China University of Petroleum, Beijing 102249, China Key Laboratory of Catalysis of China National Petroleum Corporation, China University of Petroleum, Beijing 102249, China

出　　处：《Science China Chemistry》索引2006年第49卷第2期,共7页

摘　　要：Using silica gel as the precursor, MCM-22(p) was synthesized under the static conditions. Then ITQ-2 zeolite was obtained by using n-cetyltrimethylammonium bromide (CTAB) and tetrapro- pylammonium hydroxide (TPAOH) as the swelling agents to swell the pores of MCM-22(p). The ob- tained zeolite was characterized by XRD, SEM, BET, NH3-TPD. The results show that the zeolite had the best swelling when MCM-22(p):CTAB:TPAOH=1:4:1. The synthesis duration and temperature did not influence significantly the pore swelling. Except TPAOH, CTAB can also be used together with tetrabuthylammonium hydroxide (TBAOH) as the pore swelling agent. There was contribution of sur- face area and pore volume from the mesoporous pores in the ITQ-2 zeolite and it also showed weaker acidity than MCM-22. However, the ITQ-2 supported NiW catalyst showed higher activity and selec- tivity to the middle distillates in the hydrocracking of vacuum gasoil (VGO) than MCM-22 supported catalyst. This implied that the diffusion of large molecules of heavy oil in the catalyst was facilitated due to the presence of the mesoporous pores and hence higher activity and selectivity to middle dis- tillates. 关键词：STATIC crystallization, ZEOLITE ITQ-2, SWELLING agent, delaminated zeolite, hydrocracking.

相关文献

参考文献（8）
引证文献（3）
耦合文献（21）

参考文献(8)

引证文献(3)

耦合文献(21)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Synthesis of ITQ-2 zeolite under static conditions and its properties

参考文献(8)

引证文献(3)

耦合文献(21)

用户提示