Affiliation: | aCentro de Ciencias Aplicadas y Desarrollo Tecnológico; Cd. Universitaria A.P. 70-186, CP 04510 México, D.F, Mexico bInstituto des Materiales, Cd. Universitaria A.P. 70-186, CP 04510 México, D.F, Mexico cInstituto Mexicano del Petróleo, Eje Central # 152, Col. San bartolo Atepehuacan, CP 07730, México, D.F, Mexico |
Abstract: | This contribution deals with the synthesis of a silicon-rich ZSM-5 obtained from an amorphous organo-alumino-silicic gel. The gel was formed by reacting a mechanical mixture of RHA (rice hull ash), silica’s source, and of natural clinoptilolite, source of alumina, with glycerol during 2 h at 200 °C. After a maturation period of one day at 60 °C, the reaction product was hydrolyzed by a tetra-propyl-ammonium (TPA) solution and then aged for two days at 135 °C in a stainless steel autoclave. After washing and drying, the X-ray pattern showed a well crystallized ZSM-5. The textural analysis of the slowly calcined solid at 500 °C for 4 h, and the SEM micrographies evidence that the zeolite was supported on mesoporous silica. The proportion of both components depends on the tunable hydrolysis conditions. |