Ngwa na njikọ nke ZSM-5 molecular sieve

I. Okwu mmalite

ZSM-5 molecular sieve bụ ụdị microporous ihe nwere usoro pụrụ iche, nke ejirila ọtụtụ ebe mee ihe n'ọtụtụ ebe n'ihi njirimara mgbasa ozi dị mma, nkwụsi ike na ọrụ catalytic. N'akwụkwọ a, a ga-ewebata ngwa na njikọ nke sieve molecular ZSM-5 n'ụzọ zuru ezu.

Nke abụọ, ngwa nke ZSM-5 molecular sieve

1. Catalyst: N'ihi nnukwu acidity na usoro pore pụrụ iche nke ZSM-5 molecular sieve, ọ ghọọla ihe na-akpali akpali maka ọtụtụ mmeghachi omume kemịkal, dị ka isomerization, alkylation, dehydration, wdg.
2. Adsorbent: ZSM-5 molecular sieve nwere nnukwu pore olu na arụmọrụ adsorption dị mma, a na-ejikwa ya na nkewa gas, nkewa mmiri mmiri na onye na-ebu ibu na ubi ndị ọzọ.
3. Catalyst carrier: enwere ike iji ya mee ihe dị ka onye na-ebu ibu iji meziwanye ọrụ na nkwụsi ike nke onye na-emepụta ihe.

Synthesis nke ZSM-5 molekụla sieve

Ngwakọta nke sieve molecular ZSM-5 na-ejikarị usoro ndebiri, nke na-achịkwa usoro njikọ site na ịchịkwa okpomọkụ, nrụgide, oke akụrụngwa na ọnọdụ ndị ọzọ. N'ime ha, ihe ndị a na-ejikarị eme ihe bụ sodium silicate na sodium aluminate.

1. Njikwa nke silica-aluminom ratio: silica-aluminum ratio bụ otu n'ime ihe ndị dị mkpa nke ZSM-5 molecular sieve, nke nwere ike ịchịkwa site n'ịgbanwe nhazi nke sodium silicate na sodium aluminate. N'ịdị elu nke silicon na aluminom, ka usoro nke sieve molekụla kpụrụ bụ silicon, na nke ọzọ.
2. Synthesis okpomọkụ na nrụgide: njikọ okpomọkụ na nrụgide bụkwa ihe ndị dị mkpa na-emetụta nhazi nke ZSM-5 molecular sieve. N'ozuzu, okpomọkụ dị elu na nrụgide dị elu na-enyere aka ịmepụta ZSM-5 molecular sieves.
3. Oge crystallization na okpomọkụ crystallization: oge ​​crystallization na crystallization okpomọkụ bụ ihe dị mkpa na-emetụta Ọdịdị nke ZSM-5 molecular sieve. Ọnụego nhazi na ịdị ọcha nke ZSM-5 molecular sieve ka emelitere site n'ịbawanye okpomọkụ kristal n'oge kristal kwesịrị ekwesị.
4. Ihe inyeaka nke sịntetik: Mgbe ụfọdụ iji gbanwee uru pH ma ọ bụ kwalite usoro kristal, ọ dị mkpa ịgbakwunye ụfọdụ ihe enyemaka sịntetị, dị ka NaOH, NH4OH, wdg.

Iv. Mmechi

Dị ka ihe dị mkpa microporous ihe, ZSM-5 molekul sieve nwere obosara ngwa atụmanya. Ọ dị mkpa ịghọta usoro njikọ maka ngwa ya sara mbara. Site n'ịchịkwa ọnọdụ njikọ ahụ, a na-edozi usoro pore, acidity na catalytic properties nke ZSM-5 molecular sieve nke ọma, nke na-enye ohere ndị ọzọ maka itinye ya n'ọrụ dị iche iche.