Hauv kev lag luam catalytic purification, thaj chaw tshwj xeeb tswj hwm qhov ntau ntawm cov chaw nquag ntawm cov catalysts, thaum lub pore ntim thiab pore txoj kab uas hla ncaj qha tswj hwm huab hwm coj diffusion muaj peev xwm, muaj kuab paug tuav lub peev xwm thiab lub siab txwv ntawm kev ua haujlwm. Lawv yog cov qauv ntsuas tseem ceeb rau kev ntsuas kev ua haujlwm catalyst, tiv thaiv -kev ua qias tuaj thiab kev pabcuam lub neej. Ntau ntawm - teeb meem kev ua haujlwm ntawm qhov chaw suav nrog kev nkag mus tsis txaus, qhov nce siab ntawm lub txaj siab poob sai thiab ntxov ntxov catalyst deactivation qia tsis yog los ntawm kev ua haujlwm tsis txaus, tab sis cov qauv pore tsis sib haum nrog cov khoom siv tiag tiag.
Pore ntim yog hais txog tag nrho cov ntim ntawm sab hauv pores ib chav tsev loj ntawm catalyst, thiab nws cov haujlwm tseem ceeb yog los txiav txim siab lub peev xwm catalyst rau cuab thiab khaws cov khoom paug. Pub roj los ntawm roj av refining, natural gas purification, biogas desulfurization thiab lwm yam kev ua hauj lwm feem ntau muaj impurities xws li plua plav, colloids, taug qab hnyav hydrocarbons thiab sulfide deposits. Cov pore ntim txaus tuaj yeem ua kom haum cov pa roj carbon deposits, precipitates thiab adsorbed impurities generated thaum lub sij hawm cov tshuaj tiv thaiv, ua kom lub pore blockage, thiab tswj cov kua permeability ruaj khov ntawm cov catalyst nyob rau lub sij hawm ntev - ua haujlwm. Catalysts uas tsis tshua muaj pore ntim yuav muaj cov pores sai sai thiab thaiv los ntawm cov kab mob, tiv thaiv feedstock los ntawm diffusing rau hauv pores rau cov tshuaj tiv thaiv. Qhov no tsis tsuas yog txo qis kev ua tau zoo, tab sis kuj ua rau muaj kev nce siab hauv lub txaj siab, yuam kom lub tsev ua haujlwm nyob rau hauv qhov txo qis los yog ua ntej hloov catalyst.
Pore txoj kab uas hla sawv cev rau cov channel loj ntawm cov catalyst pores, uas ncaj qha tswj cov diffusion efficiency ntawm reactant molecules thiab adaptability rau kev khiav hauj lwm tej yam kev mob. Txoj kab uas hla me me dhau lawm yuav ua rau muaj kev txwv loj heev: cov organic sulfur thiab macromolecular impurities hauv cov pa roj tsis tuaj yeem nkag mus rau hauv cov pores sab hauv, thiab cov tshuaj tiv thaiv tsuas yog tshwm sim rau sab nrauv ntawm cov catalyst pellets, tawm hauv ntau qhov chaw sab hauv uas tsis siv thiab txo cov khoom noj kom zoo. Xws li catalysts yog tshwj xeeb tshaj yog tsis haum rau industrial units nrog siab qhov chaw tshaj tawm thiab loj txaus tus nqi. Cov catalysts nrog qhov loj me me tso cai rau cov kua dej dhau los ntawm lub txaj catalyst sai, ua kom muaj kev siv tag nrho ntawm ob qho tib si sab hauv thiab sab nraud cov chaw ua haujlwm kom txhawb nqa kev ua haujlwm siab -load ntau lawm.
Nws yuav tsum tau muab sau tseg tias qhov loj pore txoj kab uas hla yog tsis haum. Cov pores loj dhau yuav txo qis cov catalyst qhov chaw tshwj xeeb thiab cov chaw ua haujlwm, ncaj qha txo qis catalytic conversion efficiency. Lub caij no, cov pores loj loj ua rau lub cev muaj zog ntawm cov cab kuj, ua rau cov catalyst nquag pulverization thiab fragmentation thaum ua haujlwm. High-cov khoom siv hluav taws xob zoo tau txais cov txheej txheem ntawm qhov pore nrog zoo- qhov sib npaug ntawm qhov pore ntim thiab lub pore txoj kab uas hla raws li kev ua haujlwm, sib npaug diffusion efficiency, muaj kuab paug tuav lub peev xwm thiab cov qauv kev ruaj ntseg.
Hauv cov ntsiab lus, thaj chaw tshwj xeeb tau lees paub cov kev ua haujlwm catalytic, thaum lub pore ntim thiab pore txoj kab uas hla teeb tsa lub peev xwm ua haujlwm siab tshaj plaws. Thaum lub sij hawm xaiv catalyst, cov khoom uas muaj cov qauv pore matched rau pub impurity cov ntsiab lus, chav tsev ceev ceev thiab kev khiav hauj lwm load yuav tsum tau xaiv kom maximize unit throughput, ncua catalyst kev pab mus ncig thiab txiav enterprise kev lag luam thiab catalyst hloov cov nqi.