Influence of the treatment of mordenite by Ammonium hexafluorosilicate (cas 16919-19-0) on physicochemical and catalytic properties
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Add time:08/08/2019 Source:sciencedirect.com
Different samples were prepared by treating a NH4MOR sample (Si/Al = 5) with Ammonium hexafluorosilicate (cas 16919-19-0). The dealumination of the outer surface of mordenite crystallites was more pronounced than that of the bulk. A decrease in the adsorption rate and capacity for organic molecules and in activity and stability for m-xylene transformation was observed. Furthermore, the isomerization selectivity was improved because of inhibition of desorption of bulky products of m-xylene disproportionation. All of these observations can be related to a dealumination of the mordenite limited to the pore mouth with deposit, at the entrance of channels, of aluminum species extracted from the framework.
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