Ka-hortagga FCC ee la sii daayay Y Zeolite: DAY-30, DAY-60 iyo DAY-120

Ka-hortagga FCC ee la sii daayay Y Zeolite: DAY-30, DAY-60 iyo DAY-120

DAY -30, DAY-60 iyo DAY-120 FCC kiciyayaasha waxa lagu xalliyaa Y (DAY) zeolites, kuwaas oo asal ahaan ah nooc ka mid ah ultra-stable Y zeolite (USY), iyo DAY taxane shaandho molecular waa mid ka mid ah qaybaha muhiimka ah ee firfircoon ee FCC kicinta warshadaha casriga ah ee saliidda.

Waa maxay sababta FCC ay ugu baahan tahay Katalyst-ka Sieve Molecular?

FCC waxay u taagan tahay Fluid Catalytic Cracking, habka beddelka kicinta muhiimka ah ee warshadaha sifaynta saliidda. Hadafka ugu weyn ee FCC waa in loo beddelo jajabyada batroolka culus ee shidaalka, LPG, propylene, olefins khafiif ah, naaftada, iyo saliid wareeg ah.

Kiciyeyaasha FCC waxay u baahan yihiin inay isku mar la kulmaan shuruudaha acidity sare, xulashada qaabka wanaagsan, xasilloonida kuleylka sare, caabbinta wanaagsan ee joojinta, iyo waxqabadka dheecaanka wanaagsan. Y{1} nooca zeolite shaandhada molecular waa mid ka mid ah qaybaha firfircoon ee firfircoonida FCC casriga ah, iyo taxanaha DAY ee shaandhada molecular waa wakiilka Y{2} nooca alaabta shaandhada molecular ee goobta FCC.

Waa maxay DAY Molecular Sieve?

DAY waxay u taagan tahay Dealuminated Y, iyo DAY shaandho molecular caadi ahaan waxa loola jeedaa Y{0}}nooca zeolite ee lagu sameeyay wax ka beddelka heshiiska. Shaandho molecular DAY ma aha qaab madax-bannaan oo gebi ahaanba ka duwan Y{2}}nooca zeolite, laakiin waa nooc ka mid ah walxaha sare{3}}silica Y-nooca nooca loo sameeyay iyadoo lagu saleynayo Y-nooca zeolite.

Iyada oo loo marayo daawaynta hydrothermal iyo kiimikaad, Y -nooca shaandhada molecular wuxuu si xushmad leh meesha uga saari karaa qaar ka mid ah aluminium qaab dhismeedka, si markaas u beddelo silica{1}}ilaa{2}} saamiga alumina, aysiidhka, qaybinta xarunta asiidhka, xasiloonida hydrothermal, qaab dhismeedka daldaloolada, xasiloonida kulaylka, iyo xulashada firfircoonida.

Iyo kicinyaasha FCC waxay u baahan yihiin xasillooni kuleyliyaha sare oo sarreeya. Marka la barbar dhigo Y{1} nooca shaandhada molecular ee caadiga ah, DAY shaandhada molecular ayaa si ka wanaagsan u awood u leh inay u adkeyso heerkulka sare{2}} iyo jawiyada hadhiyrooterka ee kicinta FCC.

Astaamaha Dhismaha ee Sifooyinka Molecular DAY

DAY waxa iska leh Y{0}nooca shaandhada molecular shaandhada, iyo qaabdhismeedkeedu waxa uu leeyahay dusha sare ee FAU caadiga ah. Sadexdeeda- qaab dhismeedkeeda yar yar ee isku xidhan oo cabbir ahaan isku xidhan ayaa u oggolaanaya fal-celiyeyaasha iyo alaabtu inay ku dhex faafaan crystal-ka.

Dealumination waa mid ka mid ah hababka wax ka beddelka qaabdhismeedka ugu muhiimsan ee shaandho molecular DAY, laakiin ma aha arrin si fudud loo yareeyo waxa ku jira aluminium. Kaaliyeyaasha FCC, dheelitirka ayaa loo baahan yahay in lagu dhufto aashitada, qaab dhismeedka daloolka, xasiloonida kulaylka, iyo xulashada kicinta.

Waa maxay sababta DAY Zeolite ay muhiim ugu tahay FCC Catalysts?

Sida aan soo sheegnay, FCC kiciyayaashu waxay u baahan yihiin dib u soo celin soo noqnoqota oo hoos timaada heerkulka sare iyo xaaladaha uumiga biyaha, Dealuminated Y (DAY) zeolite waxay soo bandhigaysaa xasillooni kuleyliyaha kuleylka ah oo ka wanaagsan Y{0}nooca shaandhada molecular ee caadiga ah. Xarumaha aashitada ee qaabka DAY waxay si wax ku ool ah kor ugu qaadi karaan beddelka hydrocarbons culus una beddelaan alaab fudud, saddexdeeda{2}}qaabdhismeedka cabbiraadda mikroporous waa la beddeli karaa oo lagu dari karaa qalabka matrixka si loo hagaajiyo waxqabadka fidinta kicinta.

Kiciyayaasha FCC si fudud uma hiigsan karaan dildilaaca ugu xoogan, laakiin waxay u baahan yihiin in la xakameeyo dhaqdhaqaaqa dildilaaca iyo xulashada alaabta. DAY zeolite waxaa lagu xakameyn karaa qiyaasaha sida silica -ilaa{2}} saamiga alumina, cabbirka hadhuudhka, aysiidhka, iyo qaabka daloolka.

Waxaa xusid mudan, kicinta FCC dhab ahaantii maaha shaandho molecular saafi ah! Waa nidaam isku dhafan oo ka kooban shaandho molecular, matrix, binder, iyo qaybo kale oo shaqeynaya. Shaandho molecular DAY waa mid ka mid ah agabka firfircoon ee asaasiga ah ee kicinta FCC, waxay ku habboon tahay in lagu daro matrixka kicinta, halkii ay noqon lahayd kicinta FCC oo dhammaystiran lafteeda.

DifafaaleBInta u dhaxaysa DAY-30, DAY-60Aiyo DAY-120

DAY-30 Kataliye: Waxay leedahay heer hoose oo dealuminization ah, waxay xoogga saartaa aashitada iyo dhaqdhaqaaqa dillaaca, waxayna raacdaa heerka beddelka sare, laakiin waxay leedahay dareen aad u sarreeya si ay u dhaliso kookaha.

DAY-60 Kataliye: Waxay leedahay heer dhexdhexaad ah oo heshiis ah iyo dheellitir wanaagsan oo u dhexeeya dhaqdhaqaaqa aashitada iyo xasilloonida, taasoo ka dhigaysa nooc caadi ah oo ka mid ah kicinta FCC ee warshadaha.

DAY-120 Kataliye: Waxay leedahay heer qoto dheer oo wax-ku-soo-saarid ah waana mid sare -silica, ultra{1}} shaandho molecular Y oo deggan oo leh xasilloonida kuleyliyaha ugu wanaagsan, u janjeersiga sameynta kookaha hoose, iyo kicinta cimriga dheer. Waa lagu dabaqi karaa -waxqabadka sare ee FCC nidaamyada katalytik

Si lagaaga caawiyo inaad doorato nooca saxda ah ee taxanaha DAY ee shaandhada molecular, aan samayno isbarbardhig tafatiran: