摘要
以廉价的水玻璃（钠型或钾型水玻璃）作为二氧化硅的前驱体和碱源，十六烷基三甲基溴化铵为模板剂，采用水热晶化法一步合成了介孔分子筛MCM-41。采用XRD、FT—IR、N2吸附-脱附等手段对合成的样品进行了表征。结果表明，合成的样品具有较好的有序度和优良的表面性质，比表面积和孔径分别为867．7m^2／g和3．59nm。向反应体系中添加适量的90^#商用汽油，可以起到扩孔的作用，使得介孔MCM-41的孔体积和孔径变大，分别为0．96cm^3／g和4．74nm。此成本低廉的合成路线对于介孔分子筛的工业化有重要意义。
The mesoporous molecular sieves MCM-41 were synthesized hydrothermally by one-step process using inexpensive water glass as silica source and alkali source, and cetyltrimethylammonium bromide as templating agent. The obtained samples were characterized by XRD, FTqR, Nz adsorption-desorption. The experimental results showed that the obtained samples have high degree of order and excellent surface properties, with specific surface area and pore diameter of 867.7 m^2/g and 3.59nm, respectively. The mesoporous silica MCM-41 with large pore volume and pore diameter of 0.96 cm^3/g and 4.74 nm, respectively, can be obtained by adding proper amount of 90^# gasoline to original reactive formulation, which indicated that the added gasoline played a role of pore diameter expander. The cheaper synthetic route will be helpful to the industrialization of such mesoporous materials.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2006年第B10期149-152,共4页
Acta Petrolei Sinica(Petroleum Processing Section)
关键词
介孔
MCM-41
水热合成
硅源
扩孔剂
mesoporous； MCM-41
hydrothermal synthesis
silica source； swelling agent
