摘要
首次采用超浓体系合成法，并引入促进剂，在180℃条件下晶化48h，合成出具有高结晶度的NU-87纯相分子筛，并考察了促进剂、投料硅／铝比（n（SiO2）／n（A12O3））、碱／硅比（n（OH-）／n（SiO2））、水／硅比（n（H2O）／n（SiO2））、模／硅比（n（DecBr2）／n（SiO2））等对合成结果的影响。采用X射线衍射（XRD）、扫描电镜（SEM）、红外光谱（IR）等手段对样品进行了表征。结果表明，在促进剂的作用下，在n（SiO2）／n（Al2O3）为40～50、n（OH-）／n（SiO2）为0．12～0．18、n（H2O）／n（SiO2）为13、n（DecBr2）／n（SiO2）为0．10～0．12条件下，可得到高结晶度的NU-87分子筛。对NU-87的裂化催化评价结果显示，与添加ZSM-5的催化剂相比，添加NU-87的催化剂不仅可以使汽油收率增加2％～5％，而且明显地增加了异构烷烃、芳烃产率，改善了产品分布。
The NU-87 zeolite was synthesized in extremely dense system at 180℃ for 48 h with promoter. products were characterized by X-ray powder diffraction （XRD）, scanning electron microscopy （SEM）, IR NMR. The influence of promoter and the molar ratio of SiO2/Al2O3, OH-/SiO2, H2O/SiO2, DecBr2/SiO2, investigated. The result indicated that under the promoter function, SiO2/Al2O3 molar ratio range of 40 The and was 50, OH /SiO2 molar ratio range of 0.12--0.18, H2O/SiOz molar ratio of 13, DecBr2/SiO2 molar ratio range of 0.10-- 0.12, the high crystallinity NU-87 zeolite was synthesized. NU-87 zeolite was used as an additive component for the fluid catalytic cracking （FCC） catalysts. Compared with ZSM-5, the proper amount of NU-87 zeolite added to FCC catalyst made not only the yield of gasoline increase by 2%- 5%, but also isomerism alkane, the aromatic hydrocarbon production rate obvious increase and the product distribution improved.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2008年第B10期79-83,共5页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
国家自然科学基金项目（20476060）资助
