表面含磷酸的介孔分子筛P-SBA-15的合成及其性能评价  

Synthesis and catalytic properties of mesoporous molecular sieve P-SBA-15

作　　者：武宝萍[1] 袁兴东[2] 张秋荣[1] 亓玉台[2] 宋长生[1] 王慧彦[1] 

机构地区：[1]淮海工学院化工系,江苏连云港222005 [2]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《燃料化学学报》2006年第5期620-624,共5页Journal of Fuel Chemistry and Technology

基　　金：淮海工学院自然科学基金(Z2005014)

摘　　要：采用后合成法,将磷酸固载在纯硅介孔分子筛SBA-15表面上。利用X射线衍射(XRD)、红外光谱(IR)、氮气吸附-脱咐法(BET)分析方法表征催化剂的物理性能。结果表明,催化剂P-SBA-15在高温焙烧后保持了稳定的介孔分子筛SBA-15结构,该催化剂的比表面积和孔径分别为605.45 m2/g和5.576 nm(磷硅摩尔比5%)。选用十一碳烯酸与异丙醇的酯化反应对催化剂P-SBA-15的催化反应性能进行评价,同时与其他几种微孔沸石分子筛催化剂催化性能相比表明,磷酸改性的介孔分子筛P-SBA-15是合成十一烯酸异丙酯较为理想的固体酸催化剂,考察了催化剂的稳定性。A well-ordered mesoporous material P-SBA-15 functionalized with phosphoric acid group was prepared by post-synthetic method. Characterizations by power X-ray diffraction （XRD）, infrared spectroscopy （IR）, as well as nitrogen sorption（BET）were carded out to understand the physical properties of P-SBA-15. The results show that the structure of P-SBA-15 remains that of silica mesoporous material SBA-15, and the specific surface area and the mesopore size of P-SBA-15 are 605.45 m^2/g and 5. 576 nm （ np/n si = 5% for example）, respectively. Synthesis of iso-propyl undecylenate over the P-SBA-15 catalysts was studied in order to investigate the catalytic properties of mesoporous molecular sieve P-SBA-15. Compared with liquid acid and microporous zeolite catalysts, the P-SBA-15 is the best one among the solid acids for esterification reaction. Reuse of P-SBA-15 indicated this catalyst has high stability under esterification conditions.

关 键 词：介孔分子筛 表征 磷酸 酯化反应 十一碳烯酸 

分 类 号：O643.1[理学—物理化学]