MODIFICATION OF CLINOPTILOLITE BY SYNTHETIC ZEOLITE

The sol-gel process allows to modify clinoptilolite by the nucleation of synthetic zeolite. From the viewpoint of methanol conversion, the o btained high Al content nucleation-deposited zeolite decreases the cat alytic activity of clinoptilolite. Therefore, it is necessary to optim ize the selection of suitable synthetic zeolite as to its composition. Contamination of zeolite surfaces by carbonaceous fragments during ca talytic process results from physico-chemical characteristics of the u sed and processed zeolite, and according to DTA and TG analysis it sig nificantly affects the readsorption of water vapours and likely also t he zeolite activity in methanol conversion.