Kedu Sieves Molecular A na-eji na Nnụcha mmanụ FCC Catalysts?
FCC (Fluid Catalytic Cracking) ihe na-eme ka klaasị bụ klaasị nke ọtụtụ ihe katalytic na-arụ ọrụ nke a na-eji na usoro nnụcha mmanụ ala iji mee ka hydrocarbons dị arọ mee nke ọma ka ọ bụrụ ngwaahịa dị elu-uru- agbakwunyere dị ka mmanụ ụgbọala, mmanụ mmanụ mmanụ, na olefins. Ha na-abụkarị ihe ndị na-arụ ọrụ, ihe matriks, ihe nkedo, na ihe ndochi.
Ụdị na Ọrụ nke Sieves Molecular Maka FCC Catalysts
Ihe na-eme ka FCC nwere acidity dị elu, ezigbo nkwụsi ike hydrothermal, yana ihe mgbochi siri ike{0}, na-enyere ha aka ịkwalite mmeghachi omume dị ka mgbawa, isomerization, na nnyefe hydrogen nke macromolecular hydrocarbons n'okpuru ọnọdụ mmiri ọkụ dị elu{1}. Ọzọkwa, site n'ịgbanwe ụdị sieve molekụla, ọdịnaya ụwa na-adịghị ahụkebe, acidity na usoro pore, enwere ike imezi mkpụrụ na nhọrọ nke ngwaahịa ezubere iche dị ka mmanụ ụgbọala, propylene, na LPG.
Ya mere, sieves molekụla dị iche iche dị na FCC na-akpali akpali na-arụ ọrụ mmekọ ọnụ. Y{1} ụdị sieves molekụla na ụdị ha gbanwetụrụ bụ isi ihe na-arụ ọrụ nke FCC. Enwere ike iji sieve molecular beta kwalite mgbawa, isomerization, na nhọrọ ngwaahịa nke hydrocarbons akọwapụtara. Dịka mgbakwunye na-arụ ọrụ, ZSM{7}}5 nwere ike melite mkpụrụ olefins ọkụ. Na ZSM-11 molecular sieve na-eji maka udi-ahọrọ cracking nke hydrocarbons na ụkpụrụ nke ìhè olefins.
USY Molecular Sieve: Ihe kacha mkpa na-arụ ọrụ
Y{0}ụdị molecular sievebụ isi mgbawa{0}} ihe na-arụ ọrụ maka FCC, naUltrastable Y (USY)bụ ụdị zeolite kacha agbawa agbawa. Elu{1} silica Y ma ọ bụEmechara Y (Ụbọchị)bụ ma USY molecular sieves. Enwere ike ịghọta USY dị ka Y{1} ụdị zeolite nke enwetala ọgwụgwọ nkwụsi ike dịka nkwekọrịta na ọgwụgwọ hydrothermal.
Dị ka FCC na-akpali akpali na-enweta usoro mmeghachi omume na mmeghari ugboro ugboro, ha ga-anagide okpomọkụ dị elu na uzuoku - gburugburu bara ụba. N'ihi ya, USY na-egosipụta nkwụsi ike nke hydrothermal dị elu, nkwụsi ike siri ike na nkwụsị nke uzuoku, nkwụsi ike dị elu, na ikike magburu onwe ya maka ịgbawa nnukwu ụmụ irighiri ihe.
REY/RE{{0}USY Molecular Sieve: Arụmọrụ Balances, Coke and Stability
Y zeolites-wa agbanweela na-enwe nnukwu uru ụlọ ọrụ na ihe mkpali FCC. Ihe ndị a na-adịghị ahụkebe{2} metụtara gụnyere La, Ce, na Nd. Obere mgbanwe -ụwa ion nwere ike melite nkwụsi ike ọkụ, nkwụsi ike hydrothermal, acidity, ọrụ, na coke selectivity nke Y- ụdị zeolite molecular sieves.
Ya mere, ndịREY (obere-Earth Y)naRE-USY (Obere-Earth Ultra-Stable Y)A na-ejikarị sieves molecular arụ ọrụ na mmanụ ala FCC, iji kwalite ọrụ na nkwụsi ike, yana ime ka nguzozi n'etiti ọrụ catalytic, mkpụrụ coke, na mmanụ ụgbọala/dizel selectivity.
Beta Molecular Sieve: na-eme ka ntụgharị Hydrocarbons akọwapụtara
Beta abụghị isi ihe na-eme ka ọ dị na FCC, n'adịghị ka USY. Mana kama nke ahụ, ọ bụ ihe e ji mara ụfọdụ usoro ma ọ bụ sieves molecular zeolite arụrụ arụrụ.
Beta molekụla sievenwere BEA topology ma nwee sistemu pore- buru ibu{1} atọ. Acidity ya siri ike na ọwa pore buru ibu na-eme ka ojiji ya na ngwa FCC maka mgbawa hydrocarbon, isomerization, na hydrocracking{3}}mmeghachi omume metụtara, yana maka imeziwanye etiti{4}distillate selectivity na ịkwalite ntughari nke ụfọdụ hydrocarbons.
ZSM-5 Molecular Sieve: Na-akwalite Nhazi Olefins Ìhè
Ọrụ nkeZSM-5 molekụla sievena usoro FCC dị iche, ọ na-arụ ọrụ dị ka ihe mgbakwunye FCC. Ọ bụ ezie na Y{1} ụdị zeolite bụ isi na-ahụ maka ịgbawa nnukwu mkpụrụ ndụ mmanụ dị arọ{2}}, ZSM{4}}5 na-elekwasị anya n'ịgbanwe n'ihu nke hydrocarbons gasoline ma na-akwalite mmepụta nke olefins ọkụ.
ZSM-5 zeolite nwere atụmatụ MFI nwere nhazi microporous ma na-egosipụta njirimara njiri mara ụdị nhọrọ. Ịtinye ZSM-5 n'ime sistemụ FCC na-ebuli mkpụrụ nke propylene, ethylene, LPG, na olefins ọkụ, na-ebelata mmanụ ụgbọala ma ọ bụ gbanwee olefin mejupụtara mmanụ ụgbọala. Na ngwakọta nke USY na ZSM-5 molecular sieves bụ nnọọ ahụkarị FCC catalyst usoro.
ZSM-11 Molecular Sieve: Na-achịkwa ma ọ bụ na-akpụzi-ahọrọ nke ọma
ZSM-11 molekụla sievebụ nke MEL topology, ihe owuwu yiri usoro MFI nke ZSM{1}}5. Ọrụ ya n'ime usoro FCC dị ka mgbawa na-ahọrọ ụdị na ụkpụrụ olefin, dịkwa ka nke ZSM-5 molecular sieve.
Na omume ụlọ ọrụ FCC, ZSM{2}} 11 molecular sieve nwere ike iji maka mgbawa hydrocarbon, aromatization, na isomerization, ma ọ bụ were dị ka ihe mgbakwunye FCC. Agbanyeghị, n'ihe gbasara ngwa FCC nke ụlọ ọrụ mmepụta ihe, sieve molecular ZSM-11 pere mpe karịa ZSM-5.
Sinmat ChemicalỌpụrụiche n'iweta sieve molecular zeolite maka ihe ndị na-eme FCC, gụnyere Y{0} ụdị sieves molecular (NaY, HY, USY, REY, RE{{1}USY, DAY), sieve molecular Beta, ZSM-5 molecular sieve, na ZSM-11 molecular sieve. Maka nkọwa ndị ọzọ, biko rụtụ aka na ibe ozi ngwaahịa.
