FCC Catalyst Dealuminated Y Zeolite: DA-30, DA-60 ne DA-120

FCC Catalyst Dealuminated Y Zeolite: DA-30, DA-60 ne DA-120

DAY-30, DAY-60 ne DAY-120 FCC catalysts yɛ dealuminated Y (DAY) zeolites, a ne titiriw no ɛyɛ ultra-stable Y zeolite (USY) bi, na DAY series molecular sieves yɛ nneɛma a ɛho hia a ɛyɛ adwuma wɔ FCC catalysts mu wɔ nnɛyi ngo a wɔde yɛ adwuma mu no mu biako.

Dɛn Nti na FCC Hia Molecular Sieve Catalyst?

FCC gyina hɔ ma Fluid Catalytic Cracking, adeyɛ a ɛho hia a wɔde dannan nneɛma a ɛma ngo yɛ adwuma wɔ ngo a wɔde yɛ adwuma mu. FCC botae titiriw ne sɛ wɔbɛdan petroleum asinasin a emu yɛ duru ayɛ no pɛtro, LPG, propylene, olefin a emu yɛ hare, diesel, ne ngo a ɛyɛ hare a ɛkyinkyini.

Ɛsɛ sɛ FCC catalysts di ahwehwɛde ahorow a ɛfa acidity a ɛkorɔn, nsusuwii pa a wɔpaw, hydrothermal stability a ɛkorɔn, ahoɔden pa a ɛko tia deactivation, ne fluidization adwumayɛ pa ho dwuma bere koro mu. Y-type zeolite molecule sieves yɛ nnɛyi FCC catalysts mu nneɛma atitiriw a ɛyɛ adwuma no mu biako, na DAY series of molecular sieves yɛ ananmusifo Y-type molecular sieve products wɔ FCC afuw mu.

Dɛn Ne DAY Molecular Sieve?

DAY gyina hɔ ma Dealuminated Y, na DAY molecular sieve taa kyerɛ Y-type zeolite a wɔayɛ dealumination nsakrae. DAY molecular sieve nyɛ nhyehyɛe a ɛde ne ho a ɛsono koraa wɔ Y-type zeolite ho, na mmom ɛyɛ ade a ɛkorɔn-silica Y-type ade a wɔde dealumination Y-type zeolite ayɛ.

Ɛnam nsuo a ɛyɛ hyew ne nnuru a wɔde sa yareɛ so no, Y-su molecule sieve tumi yiyi framework aluminium no bi, na ɛnam so sesa silica-to-alumina ratio, acidity, acid center distribution, hydrothermal stability, pore structure, thermal stability, ne catalytic selectivity.

Na FCC catalysts hwehwɛ sɛ hydrothermal stability a ɛkorɔn. Sɛ wɔde toto Y-type molecule sieves a ɛyɛ mpapahwekwa ho a, DAY molecule sieves tumi gyina FCC catalysts a ɛyɛ hyew a ɛkorɔn ne nsuo a ɛyɛ hyew a atwa yɛn ho ahyia no ano yie.

Nneɛma a Wɔde Yɛ DAY Molecular Sieves

DAY yɛ Y-type molecular sieve nhyehyɛe no dea, na ne nhyehyɛe no wɔ FAU topology a ɛyɛ nea wɔtaa yɛ. Ne microporous nhyehyɛe a ɛwɔ afã abiɛsa-a ɛka bom no ma nneɛma a ɛyɛ adwuma ne nneɛma a wɔyɛ no trɛw wɔ ahwehwɛ no mu.

Dealumination yɛ akwan a ɛho hia sen biara a wɔfa so sesa dan mu ma DAY molecule sieve no mu biako, nanso ɛnyɛ asɛm a ɛfa aluminium a ɛwɔ mu a wɔbɛma ayɛ ketewaa ara kwa. Wɔ FCC catalysts ho no, ɛsɛ sɛ wɔkari pɛ wɔ acidity, pore structure, hydrothermal stability, ne catalytic selectivity mu.

Dɛn Nti na DAY Zeolite Ho Hia Ma FCC Catalysts?

Sɛnea yɛaka no, FCC catalysts hwehwɛ sɛ wɔsan yɛ no foforo mpɛn pii wɔ ɔhyew a ɛkorɔn ne nsu a ɛyɛ hyew tebea mu, Dealuminated Y (DAY) zeolite da nsu mu hyew a ɛyɛ papa adi sen Y-type molecule sieves a ɛyɛ mpapahwekwa. Acid centers a ɛwɔ DAY nhyehyɛe no mu no betumi ahyɛ hydrocarbons a emu yɛ duru a wɔdan no nneɛma a emu yɛ hare no ho nkuran yiye, na wobetumi asesa ne microporous nhyehyɛe a ɛwɔ afã abiɛsa-na na wɔde matrix nneɛma aka ho de asiesie catalyst no diffusion adwumayɛ.

FCC catalysts no mfa n’ani nsi mpaapaemu a emu yɛ den sen biara so kɛkɛ, na mmom ɛhwehwɛ sɛ wodi mpaapaemu dwumadi ne nneɛma a wɔpaw so. DAY zeolite betumi adi so denam parameters te sɛ silica-to-alumina ratio, aburow kɛse, acidity, ne pore nhyehyɛe so.

Nea ɛda nsow ne sɛ, FCC catalyst nyɛ molecule sieve kronkron ankasa! Ɛyɛ nhyehyɛe a wɔabom ayɛ a molecule sieve, matrix, binder, ne nneɛma afoforo a ɛyɛ adwuma na ɛwom. DAY molecular sieve yɛ FCC catalyst no mu nneɛma titiriw a ɛyɛ adwuma no mu biako, ɛfata sɛ wɔde ka bom ne catalyst matrix no, sen sɛ ɛbɛyɛ FCC catalyst no ankasa.

Dnsusuwii ahorowBetween DA-30, DA-60And DA-120

DAY-30 Nneɛma a ɛma nneɛma yɛ kɛse: Ɛwɔ dealuminization a ɛba fam, esi acidity ne mpaapaemu dwumadi so dua, na edi nsakrae dodow a ɛkɔ soro akyi, nanso ɛwɔ su a ɛkorɔn kakra a ɛma ɛyɛ coke.

DAY-60 Nneɛma a ɛma nneɛma yɛ kɛse: Ɛwɔ dealumination a ɛkɔ fam na ɛkari pɛ yiye wɔ acid dwumadi ne nea egyina pintinn ntam, na ɛma ɛyɛ mfiridwuma mu FCC catalysts a wɔtaa de di dwuma.

DAY-120 Nneɛma a ɛma nneɛma yɛ kɛse: Ɛwɔ dealumination a emu dɔ na ɛyɛ silica a ɛkorɔn, ultra-stable Y molecule sieve a ɛwɔ hydrothermal stability a eye sen biara, coke formation tendency a ɛba fam, na catalyst nkwa nna tenten. Ɛyɛ adwuma wɔ FCC catalytic nhyehyɛe ahorow a ɛyɛ adwuma yiye-ho.

Sɛnea ɛbɛyɛ a wobɛboa wo ma woapaw DAY series molecule sieves a ɛfata no, ma yɛmfa ntotoho a ɛkɔ akyiri: