Mmetụta nke Si-Al ratio na ZSM molecular sieve

Si / Al ratio (Si / Al ratio) bụ ihe dị mkpa nke ZSM molecular sieve, nke na-egosipụta ọdịnaya nke Si na Al na molecular sieve. Nke a ruru nwere mmetụta dị mkpa na ọrụ na selectivity nke ZSM molecular sieve.
Nke mbụ, oke Si / Al nwere ike imetụta acidity nke sieves molecular ZSM. N'ozuzu, ka ọnụ ọgụgụ Si-Al dị elu, otú ahụ ka acidity nke sieve molecular na-esiwanye ike. Nke a bụ n'ihi na aluminom nwere ike inyekwu etiti acidic na sieve molecular, ebe silicon na-ekpebikarị nhazi na ọdịdị nke sieve molecular.
Ya mere, acidity na catalytic ọrụ nke molekụla sieve nwere ike ịchịkwa site n'ịgbanwe Si-Al ratio. Nke abuo, Si / Al ratio nwekwara ike imetụta nkwụsi ike na okpomọkụ na-eguzogide nke ZSM molecular sieve.
Sives molecular arụpụtara na oke Si / Al dị elu na-enwekarị ezigbo okpomọkụ na nkwụsi ike hydrothermal.
Nke a bụ n'ihi na silicon na molecular sieve nwere ike inyekwu nkwụsi ike, iguzogide mmeghachi omume dị ka pyrolysis na acid hydrolysis. Na mgbakwunye, oke Si / Al nwekwara ike imetụta nha pore na ọdịdị nke sieves molecular ZSM.
N'ozuzu, elu nke Si-Al ratio, nke nta nke pore size nke molekul sieve, na udi dị nso na gburugburu. Nke a bụ n'ihi na aluminom nwere ike inye ihe ndị ọzọ na-agafe agafe na sieve molecular, na-eme ka nhazi kristal dịkwuo mma. Na nchịkọta, mmetụta nke Si-Al ratio na ZSM molikula sieve bụ multifaceted.
Site n'ịgbanwe usoro Si-Al, sieves molekụla nwere oke nha na udi ya, enwere ike ịhazi ezigbo acidity na nkwụsi ike, ka ọ wee gboo mkpa nke mmeghachi omume catalytic dị iche iche.