【摘要】 以粗孔硅胶为硅源,偏铝酸钠为铝源,四乙基氢氧化铵为模板剂,分别采用微波辐射法和水热法合成了β沸石.采用IR,NH3?TPD和XRD对β沸石样品进行表征,研究了不同制备条件对β沸石样品的相对结晶度和表面酸性质的影响.在固定床反应装置上考察了β沸石样品催化裂化轻汽油的醚化活性.结果表明,与传统方法相比,微波辐射法合成β沸石,模板剂用量减少25%,晶化时间缩短36h,脱模时间缩短3.5h.微波合成样品经微波辐射脱除模板剂所得β沸石总酸量高,B酸分布好,醚化反应活性高.更多还原

【Abstract】 β-zeolite was synthesized by using tetraethylammonium hydroxide (TEAOH) as organic template, silicon gel as silicon source and sodium meta-aluminate as aluminum source, and adopting microwave radiation and hydrothermal method. The β-zeolite samples were characterized by IR, NH3?TPD and XRD. The effects of the different preparation conditions on relative crystallinity and surface acidity of β-zeolite were studied. The etherification test for fluidized catalytic cracking light gasoline was carried out in a fixed-bed reactor. The results showed that the amount of organic template in microwave radiation method was less 25%, crystallizing time shorter 36 h, and removing template time shorter 3.5 h than those in the conventional method of calcination. The β-zeolite with microwave radiation in synthesis and removing template had a higher total acid amount and an ideal distribution of Bronsted acid, and the optimum etherification activity.更多还原