Mhedzisiro yeSi-Al ratio paZSM molecular sieve

The Si/Al ratio (Si/Al ratio) chinhu chakakosha cheZSM molecular sieve, inotaridza hukama hweSi neAl musefa yemamorekuru. Chiyero ichi chine mhedzisiro yakakosha pane chiitiko uye kusarudzwa kweZSM molecular sieve.
Kutanga, chiyero cheSi / Al chinogona kukanganisa acidity yeZSM molecular sieves. Kazhinji, iyo yakakwirira yeSi-Al ratio, iyo yakasimba iyo acidity ye molecular sieve. Izvi zvinodaro nekuti aruminiyamu inogona kupa imwezve acidic centre mune molecular sieve, nepo silicon inonyanya kutarisisa chimiro uye chimiro chemolecular sieve.
Naizvozvo, iyo acidity uye catalytic chiitiko cheiyo molecular sieve inogona kudzorwa nekugadzirisa iyo Si-Al ratio. Kechipiri, iyo Si / Al reshiyo inogona zvakare kukanganisa kugadzikana uye kupisa kupisa kweZSM molecular sieve.
Masefa emamorekuru akagadzirwa pachiyero cheSi/Al chepamusoro anowanzova nekudzikama kurinani kwekupisa uye hydrothermal.
Izvi zvinodaro nekuti silicon mune molecular sieve inogona kupa kumwe kugadzikana, kuramba kuita senge pyrolysis uye acid hydrolysis. Uye zvakare, iyo Si / Al ratio inogona zvakare kukanganisa saizi yepore uye chimiro cheZSM molecular sieves.
Muzhinji, iyo yakakwirira yeSi-Al ratio, iyo diki saizi yepore ye molecular sieve, uye chimiro chiri pedyo nedenderedzwa. Izvi zvinodaro nekuti aruminiyamu inogona kupa mamwe machinjiro ekubatanidza mapoinzi mune molecular sieve, ichiita kuti chimiro chekristaro chiwedzere compact. Muchidimbu, mhedzisiro yeSi-Al ratio paZSM molecular sieve ine zvakawanda.
Nekugadzirisa reshiyo yeSi-Al, masefa emamorekuru ane saizi chaiyo yepore uye chimiro, yakanaka acidity uye kugadzikana inogona kugadzirwa, kuitira kuti isangane nezvinodiwa zvakasiyana-siyana zvinokonzeresa maitiro.