Stability upon thermal treatment of coked zeolite beta
作者： R. Millini , C. Perego , W.O. Parker , C. Flego , G. Girotti
DOI: 10.1016/S0167-2991(04)80631-1
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摘要: Abstract Dealumination during thermal treatment of zeolite Beta was examined. Repeated treatments impregnated with poly-alkylated tars (coked Beta) were made to simulate prolonged industrial usage. The partial structural collapse caused by each impregnation/calcination quantified XRD and the migration aluminum (from framework extra-framework sites) evidenced 27 Al MAS NMR IR spectroscopies. Non-impregnated thermally stable up 750°C. On contrary, limited but significant dealumination occurred Beta, due H 2 O produced combustion organic species trapped inside pores. These results allowed design an appropriate regeneration procedure for proprietary Beta-based catalyst, which is necessary avoid removal structure collapse.
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