Sintering yog qhov tshwm sim feem ntau irreversible deactivation phenomenon ntawm industrial catalysts nyob rau hauv siab -kub tej yam kev mob, dav tshwm sim nyob rau hauv chemical units xws li catalytic cracking, flue gas denitrification thiab hydrogenation reactors. Tsis zoo li cov pa roj carbon deposition thiab catalyst lom, uas tuaj yeem rov qab los ntawm kev tsim dua tshiab, sintering ua rau kev puas tsuaj mus tas li rau cov catalysts uas tsis tuaj yeem kho, yuav tsum tau hloov tag nrho. Nws yog ib qho tseem ceeb ntawm qhov shortening unit khiav hauj lwm voj voog thiab nce nqi ntau lawm.
Feem ntau cov catalysts muaj kev txhawb nqa catalysts uas nws cov kev ua catalytic pib los ntawm nano- cov hlau me me uas tau tawg rau ntawm cov khoom thauj. Cov tshuaj tiv thaiv kev ua tau zoo nyob ntawm qhov loj ntawm thaj chaw tshwj xeeb thiab ntau qhov chaw nquag muab los ntawm cov hlau me me. Nyob rau hauv kev khiav hauj lwm tej yam kev mob nrog rau tas mus li overtemperature, ntev -lub sij hawm siab- qhov kub thiab txias kev pab cuam, los yog siab kub ua ke nrog dej vapor, stability ntawm hlau hais poob drastic. Cov hlau zoo txav mus los, sib tsoo thiab fuse ntawm cov khoom thauj khoom, ua rau muaj kev loj hlob tsis tu ncua thiab loj agglomeration.
Nrog rau cov hlau particle agglomeration, catalyst carriers degrade ib txhij. Cov khoom porous xws li alumina thiab molecular sieves raug kev txom nyem pore vau thiab siv lead ua theem hloov nyob rau hauv qhov kub siab heev. Lawv cov qauv ntxeem tau raug rhuav tshem thiab thaj chaw tshwj xeeb ntawm qhov chaw poob qis, poob qhov ua haujlwm kom tawg thiab immobilize cov hlau nquag. Cov hlau loj loj thiab cov khoom thauj khoom puas ntsoog txo qis qhov chaw nquag thiab catalytic kev ua tau zoo, txo qis cov tshuaj tiv thaiv kev hloov pauv thiab nce kev siv zog.
Cov txiaj ntsig tseem ceeb ntawm catalyst sintering muaj xws li kub kub khiav ceev, lub zos overtemperature, ntse kub hloov pauv thiab dej vapor ntau heev hauv cov tshuaj tiv thaiv. Raws li kev hloov pauv tsis tau hloov pauv, sintering tsis tuaj yeem rov qab los ntawm cov txheej txheem xws li coke hlawv, purging lossis rov tsim dua tshiab, ua rau muaj teeb meem catalyst tsis ua haujlwm hauv kev tsim khoom.
Kev ua haujlwm ruaj khov ua haujlwm raws li lub hauv paus ntsiab lus los tiv thaiv catalyst sintering. Cov neeg khiav dej num yuav tsum nruj me ntsis tswj cov tshuaj tiv thaiv kub kom tsis txhob overtemperature thiab kub khiav, txo qhov kub thiab txias hloov, thiab txwv cov dej vapor concentration nyob rau hauv lub system. Meanwhile, optimizing carrier lug thiab ntxiv tsawg lub ntiaj teb additives yuav immobilize nto hlau hais thiab txwv particle migration thiab agglomeration. Cov txheej txheem no ua tau zoo txhim kho qhov siab - qhov kub thiab txias ntawm cov catalysts, txuas ntxiv lub neej kev pab cuam thiab ua kom ntev - lub sijhawm ua haujlwm ruaj khov ntawm cov khoom tsim khoom.