Umlinganiselo we-Si/Al (umlinganiselo we-Si/Al) luphawu olubalulekileyo lwesihluzo se-molecular se-ZSM, esibonisa umxholo we-Si kunye ne-Al kwisihluzo se-molecular. Olu mlinganiselo lunempembelelo ebalulekileyo kumsebenzi kunye nokukhetha kwesihluzo se-molecular se-ZSM.
Okokuqala, umlinganiselo weSi/Al unokuchaphazela i-asidi yee-ZSM molecular seeves. Ngokubanzi, xa umlinganiselo weSi-Al uphezulu, i-asidi yesihluzo se-molecular iba namandla ngakumbi. Oku kungenxa yokuba i-aluminium inokubonelela nge-asidi eyongezelelweyo kwisihluzo se-molecular, ngelixa i-silicon ikakhulu imisela ulwakhiwo kunye nokuma kwesihluzo se-molecular.
Ngoko ke, i-acidity kunye nomsebenzi we-catalytic wesihluzo se-molecular unokulawulwa ngokulungelelanisa umlinganiselo we-Si-Al. Okwesibini, umlinganiselo we-Si/Al unokuchaphazela uzinzo kunye nokumelana nobushushu kwesihluzo se-molecular se-ZSM.
Ii-molecular seeves ezenziwe nge-Si/Al ratios eziphezulu zihlala zinozinzo olungcono lobushushu kunye nolwe-hydrothermal.
Oku kungenxa yokuba i-silicon kwi-molecular seeve inokubonelela ngozinzo olongezelelweyo, ukumelana neempendulo ezifana ne-pyrolysis kunye ne-acid hydrolysis. Ukongeza, i-Si/Al ratio inokuchaphazela ubungakanani beembobo kunye nokuma kwee-ZSM molecular seeves.
Ngokubanzi, xa umlinganiselo weSi-Al uphezulu, koba mncinci ubukhulu bembobo yesihluzo semolekyuli, kwaye imo isondele kwisangqa. Oku kungenxa yokuba i-aluminium inokubonelela ngamachaphaza ongezelelweyo okudibanisa kwisihluzo semolekyuli, okwenza isakhiwo sekristale sibe ncinci ngakumbi. Ngamafutshane, isiphumo somlinganiselo weSi-Al kwisihluzo semolekyuli seZSM sibanzi.
Ngokulungisa umlinganiselo we-Si-Al, ii-molecular seeves ezinobukhulu kunye nemilo ethile yeembobo, i-acidity elungileyo kunye nozinzo zinokwenziwa, ukuze kuhlangatyezwane ngcono neemfuno zee-catalytic reactions ezahlukeneyo.
Ixesha lokuthumela: Disemba-11-2023
