SYNTHESIS OF ZEOLITE ZSM-48 FROM RICE HUSK ASH

Zeolite ZSM-48 with a very high crystallinity (99%(+)) can be synthesi zed from a reaction mixture containing a silica source from rice husk gasification ash. The difference in the cracking behavior of n-hexane for zeolites ZSM-5 and ZSM-48 may be attributed to the unique two-dime nsional channel structure for the ZSM-48. The ammonia desorption data also indicate that the influence of the channel system of ZSM-48 could play an important role in the molecular traffic control. (C) 1998 Els evier Science B.V.