IiCatalysts ezixhaswa yi-Alumina: Umdlali oPhambili kwiShishini leMichiza

IiCatalysts ezixhaswa yi-Alumina: Umdlali oPhambili kwiShishini leMichiza

Ii-catalysts ezixhaswa yi-alumina zidlala indima ebalulekileyo kwiinkqubo ezahlukeneyo zeekhemikhali, zizenza zibe yinxalenye ebalulekileyo kwishishini lemichiza. Ezi zixhobo zisetyenziswa kakhulu kwi-petrochemical, amayeza, kunye nezicelo zokusingqongileyo, ngenxa yeempawu zazo ezikhethekileyo kunye nokuguquguquka. Kweli nqaku, siza kuphonononga ngokubaluleka kwe-alumina exhaswa yi-catalysts, izicelo zabo, kunye nezinto eziphembelela amaxabiso azo, ngakumbi kugxilwe kwixabiso le-gamma alumina, ibhola ye-aluminium oxide, kunye ne-alumina catalyst esebenzayo.

I-Alumina exhaswayo i-catalysts i-catalysts apho i-catalytic component esebenzayo ihlakazwa kwinkxaso ye-alumina ephezulu. Ukusetyenziswa kwe-alumina njengesixhobo senkxaso kunika iingenelo ezininzi, kubandakanywa indawo ephezulu, ukuzinza kwe-thermal, kunye nokuchasana nemimandla enzima yeekhemikhali. Ezi zincedisi zifumana ukusetyenziswa ngokubanzi kwiinkqubo ezifana ne-hydrocracking, i-hydrotreating, kunye nokuguqulwa kwe-catalytic kwishishini lokucoca i-petroleum. Ukongezelela, baqeshwe ekuveliseni imichiza eyahlukahlukeneyo, kuquka iipolymers, iiplastiki, kunye neziphakathi zamayeza.

Enye yezinto eziphambili ze-alumina ezixhasayo ze-catalysts yi-gamma alumina, eluhlobo lwecrystalline ye-alumina eyaziwa ngokuba yindawo ephezulu kunye ne-porosity. Ixabiso le-gamma alumina yinto ebaluleke kakhulu kwiindleko ezipheleleyo ze-alumina ezixhaswayo. Amaxabiso e-gamma alumina iphenjelelwa zizinto ezininzi, kubandakanya iindleko zemathiriyeli ekrwada, amaxabiso amandla, kunye nemfuno yentengiso. Ukongeza, umgangatho kunye nokucoceka kwe-gamma alumina ikwachaphazela ixabiso layo, njengoko amabakala aphezulu okucoceka ayalela iprimiyamu kwintengiso.

Elinye icandelo elibalulekileyo elinxulumene ne-alumina exhaswa yi-catalysts yibhola ye-aluminium oxide. Ezi bhola zisetyenziselwa njengezinto zokuxhasa i-catalysts, ukubonelela indawo ezinzileyo kunye ne-inert kumacandelo asebenzayo e-catalytic. Amaxabiso eebhola ze-aluminiyam oxide iphenjelelwa zizinto ezifana neendleko zemveliso, imfuno yemarike, kunye nokufumaneka kwezinto ezikrwada. Ubungakanani kunye nokuma kweebhola nazo zidlala indima ekunqumeni ixabiso labo, njengoko iibhola ezincinci kunye nezifanayo zihlala zibiza kakhulu ngenxa yokuchaneka okufunekayo kwinkqubo yabo yokuvelisa.

I-activated alumina catalyst yenye into ebalulekileyo kwindawo ye-alumina exhaswayo catalysts. I-alumina esebenzayo yimathiriyeli enemingxuma ephezulu eyaziwa ngokuba yi-adsorption kunye nepropathi ye-catalytic. Isetyenziswa ngokubanzi njenge-catalyst kunye nomphathi weendlela ezahlukeneyo zeekhemikhali, kubandakanya ukucocwa kweegesi kunye nolwelo. Amaxabiso e-alumina catalyst esebenzayo iphenjelelwa zizinto ezifana nenqanaba lokuvula, indawo engaphezulu, kunye nomthamo wepore. Amanqanaba aphezulu okuvula kunye nemimandla emikhulu yomphezulu iyalela amaxabiso aphezulu ngenxa yokwanda kwentshukumo ye-catalytic kunye nomthamo we-adsorption.

Ukuguquguquka kwe-alumina exhaswayo ye-catalysts kwandisa ekusebenziseni kwabo njengabathwali be-catalyst kwiinkqubo ezahlukeneyo zeekhemikhali. Ukukhetha umthwali we-catalyst kubalulekile ekumiseleni ukusebenza kunye nokusebenza kakuhle kwenkqubo ye-catalyst. Ii-catalysts ezixhaswayo ze-alumina zibonelela ngamandla okusebenza ngoomatshini, ukuzinza kwe-thermal, kunye nokuchasana netyhefu, okubenza babe lolona khetho lufanelekileyo kuluhlu olubanzi lwezicelo ze-catalytic. Amaxabiso e-alumina axhaswayo yi-catalysts njengabathwali baphenjelelwa yimiba efana nommandla othile, ukuhanjiswa kobungakanani bepore, kunye nendlela yokulungiselela.

Ukuqukumbela, ii-catalysts ezixhaswayo ze-alumina zibalulekile kushishino lweekhemikhali, zidlala indima ebalulekileyo kwiinkqubo ezininzi zeekhemikhali. Amaxabiso ezi zixhobo ziphenjelelwa zizinto ezahlukeneyo, kubandakanya iindleko zemathiriyeli ekrwada, amaxabiso amandla, imfuno yentengiso, kunye neempawu ezithile zecatalyst components ezifana ne-gamma alumina, iibhola ze-aluminium oxide, kunye ne-alumina esebenzayo. Njengoko imfuno yeenkqubo zeekhemikhali ezisebenzayo nezizinzileyo ziqhubeka zikhula, i-alumina exhaswayo i-catalysts ikulungele ukuhlala ingumdlali ophambili ekuqhubeni izinto ezintsha kunye nenkqubela phambili kwishishini lemichiza.