摘要
在极浓体系下，按照投料硅／铝比n（SiO2）／n（Al2O3）分别为20和35，采用不同原料合成EU-1沸石。当投料n（SiOz）／n（Al2O3）为20时，以硅溶胶为原料合成出较高结晶度的EU-1沸石。采用X射线荧光（XRF）测定产物的n（SiO2）／n（Al2O3）和反应初始凝胶基本一致。利用X射线衍射（XRD）、红外光谱（FT-IR）及低温氮气吸附等手段对样品的物相、晶体形貌以及表面积和孔体积进行表征，并将样品作为活性组分制备烃类裂化催化剂，对其催化性能进行了评价。结果表明，与高”（SiO2）／n（Al2O3）的EU-1沸石相比，超低n（SiO2）／n（Al2O3）的EU-1沸石具有较大的比表面积和孔体积，因此具有最高的裂化活性，且裂化气体产率也最大。
EU-1 zeolites with low n（SiO2 ）/n（Al2O3 ） were synthesized in extremely dense aqueous system by using solid silica gel and silica sol,respectively. The n（SiO2 ）/n（Al2O3 ） in the mixture gels were 20 and 35 respectively, which were consistent with those in as-synthesized samples determined by XRF analysis. The physicoehemical properties of samples were characterized by XRD, FT-IR, SEM, and N2-adsorption analysis. The cracking performance of EU-1 zeolites with low n（SiO2 ）/n（Al203 ） was investigated with zeolite EU-1 as active component of catalyst and diesel oil as cracking stock. It was found that the BET surface area and total pore volume of zeolite EU-1 with ultra-low n（SiO2 ）/n（Al2O3 ） were larger than other samples. Both the activity and cracking gas yield of zeolite EU-1 with ultra-low n（SiO2 ）/n（Al2O3 ） were higher than that of EU-1 with higher n（SiO2 ）/n（Al2O3 ）.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2008年第B10期39-43,共5页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
国家重点基础研究发展计划‘973’项目（2004CB217806）和中国石油股份公司科技项目（06-03C-01-01）资助
