摘要
采用化学液相沉积法对Hβ沸石进行硅改性,对其催化异丙苯烷基化反应的性能进行了评价,并对不同沉积量改性Hβ沸石催化性能的影响进行了考察;采用BET、X射线衍射、吡啶吸附一红外光谱等方法对Hβ沸石的晶相、孔结构和酸性进行了表征。实验结果表明,采用该方法可在基本不改变Hβ沸石骨架结构、内孔孔体积和内表面性质的前提下,有效钝化Hβ沸石外表面的酸性位,提高Hβ沸石催化异丙苯异丙基化反应的性能。在硅油沉积量为0.25 mL/g沉积时间为12 h时,可达到较好的改性效果,对二异丙苯选择性可达52.01%。
Silicon-modified Hβ zeolites were prepared by chemical liqid-phase deposition of silicon oil.Alkylation of isopropylbenzene with isopropyl alcohol to synthesize P-DIPB was carried out on the modified Hβzeolite catalyst.Influences of silicon oil types,its dosage on performances of the catalysts were investigated.The silicon-modified Hβzeolite catalysts were characterized by means of XRD,BET,Py-IR.After silicon modification,the structural framework,pore volume and and internal surface properties of the zeolites kept essentially unchanged but specific surface area and number of acid sites on external surface of the zeolites decreased.It revealed that after being modified by 100# silicone oil,deposit of 0.25 mL/gHβ,the conversion of IPB is 22.67%and the selectivity of P-DIPB is 52.01%.
出处
《石油化工应用》
CAS
2010年第5期14-17,共4页
Petrochemical Industry Application
基金
重质油国家重点实验室应用基础研究(NO.IRT0759)
教育部创新团队"重质油高效转化的绿色化学与工程"(NO.2006-05)。
作者简介
周卫东，男（1982-），硕士，助理工程师，主要从事催化剂的制备与开发工作。
