Isilinganiso se-Si/Al (isilinganiso se-Si/Al) siyisici esibalulekile sesihlungi sama-molecule se-ZSM, esibonisa okuqukethwe okuhlobene kwe-Si ne-Al kusihlungi sama-molecule. Lesi silinganiso sinomthelela obalulekile emsebenzini nasekukhetheni kwesihlungi sama-molecule se-ZSM.
Okokuqala, isilinganiso se-Si/Al singathinta ubumuncu bezisefo zama-molecular ze-ZSM. Ngokuvamile, uma isilinganiso se-Si-Al siphezulu, ubumuncu besisefo sama-molecular buqina. Lokhu kungenxa yokuthi i-aluminium inganikeza isikhungo esengeziwe se-acidic kusisefo sama-molecular, kuyilapho i-silicon ngokuyinhloko inquma isakhiwo nesimo sesisefo sama-molecular.
Ngakho-ke, i-acidity kanye nomsebenzi we-catalytic wesihlungo sama-molecule kungalawulwa ngokulungisa isilinganiso se-Si-Al. Okwesibili, isilinganiso se-Si/Al singathinta nokuzinza kanye nokumelana nokushisa kwesihlungo sama-molecule se-ZSM.
Izisefo zama-molecule ezenziwe ngezilinganiso ze-Si/Al eziphakeme zivame ukuba nokuzinza okungcono kokushisa kanye nokushisa kwamanzi.
Lokhu kungenxa yokuthi i-silicon esisefweni sama-molecule inganikeza ukuzinza okwengeziwe, ukumelana nokusabela okufana ne-pyrolysis kanye ne-acid hydrolysis. Ngaphezu kwalokho, isilinganiso se-Si/Al singathinta nosayizi wembobo kanye nesimo sezisefo zama-molecule ze-ZSM.
Ngokuvamile, uma isilinganiso se-Si-Al siphezulu, usayizi wembobo yesihlungo sama-molecule uba mncane, futhi ukuma kuseduze nendilinga. Lokhu kungenxa yokuthi i-aluminium inganikeza amaphuzu engeziwe okuxhumanisa esihlungweni sama-molecule, okwenza isakhiwo sekristalu sibe sincane kakhulu. Ngamafuphi, umphumela wesilinganiso se-Si-Al esihlungweni sama-molecule se-ZSM unezinhlangothi eziningi.
Ngokulungisa isilinganiso se-Si-Al, izihlungi zama-molecule ezinobukhulu obuthile be-pore kanye nesimo, i-asidi enhle kanye nokuqina kungakhiwa, ukuze kuhlangatshezwane kangcono nezidingo zezindlela ezahlukahlukene zokusabela kwe-catalytic.
Isikhathi sokuthunyelwe: Disemba 11-2023
