Cov kws tshawb fawb ntawm Kaus Lim Kauslim Lub Tsev Haujlwm Tshawb Fawb Txog Hluav Taws Xob (KIER) tau tsim cov thev naus laus zis tshiab los decompose R134a refrigerant siv cov khoom pov tseg.
Cov thev naus laus zis muaj ntau qhov txiaj ntsig zoo ib puag ncig: Nws yuav txo qis cov pa hluav taws xob hauv tsev cog khoom, siv cov khoom siv tshuaj lom neeg thiab ua kom muaj zog ntau dua li HFC txoj kev puas tsuaj uas twb muaj lawm.
Ntawm KIER Hydrogen Composites Laboratory, Dr. Lee Shin-geun pab neeg tshawb fawb tau ua tiav HFC R134a nrog 99% kev ua tau zoo los ntawm kev siv "cov av nkos liab" ua cov catalyst.
Muaj pov tseg liab av nkos raw cov ntaub ntawv (sab laug) Liab av nkos catalyst ua rau pellets (txoj cai)
Cov av nkos liab yog cov khoom tsim los ntawm txhuas, muaj hlau, txhuas thiab silicon oxides, thiab muaj xim liab. Ntau tshaj 200, 000 tons yog tsim txhua xyoo. Tam sim no, feem ntau cov av nkos liab tau muab pov tseg los ntawm kev pov tseg, tab sis nws yog alkaline heev thiab muaj cov hlau hnyav, uas tuaj yeem ua paug av thiab dej.
Raws li kev lig kev cai, R134a feem ntau yog kho los ntawm combustion thiab plasma txoj kev, tab sis combustion ua rau cov pa phem thib ob, thaum plasma txoj kev yuav tsum tau kub siab, noj ntau lub zog thiab nce nqi khoom. Txhawm rau daws cov teeb meem no, pab pawg tshawb fawb tau tsim cov thev naus laus zis catalytic decomposition uas tuaj yeem ua haujlwm ntawm qhov kub qis dua li ntshav ntshav. Lawv pom tias cov khoom siv hlau xws li hlau thiab txhuas hauv cov av nkos liab tuaj yeem cuam tshuam nrog ib leeg los ua kom muaj zog thiab ruaj khov refrigerant decomposition catalyst.
Cov av nkos liab muaj cov qauv ntxeem tau, thaj chaw loj ntawm ib chav tsev loj thiab siab thermal stability, uas ua rau cov khoom siv tshuaj tiv thaiv kom ntws zoo thiab tiv thaiv lub cev thiab tshuaj deformation thiab kev puas tsuaj rau cov catalyst. Tsis tas li ntawd, cov av nkos liab kuj tseem tuaj yeem ua qhov kev txhawb nqa los muab ib puag ncig zoo rau cov tshuaj tiv thaiv catalytic thiab txhim kho cov kav ntev thiab kev ua haujlwm ntawm catalyst.
Txhawm rau txhim kho cov nyhuv decomposition ntxiv, pab pawg tshawb fawb tau siv cov txheej txheem kho cua sov yooj yim los txhawb kev sib cuam tshuam ntawm calcium, silicon thiab aluminium Cheebtsam los tsim cov khoom sib xyaw ntawm tricalcium aluminate thiab calcium aluminium feldspar. Cov khoom siv no feem ntau yog siv los txhim kho lub zog ntawm cov cement. Nws tuaj yeem txhim kho lub zog khi ntawm cov khoom siv catalyst thiab nthuav cov tshuaj tiv thaiv thaj tsam, yog li txhim kho cov nyhuv decomposition.
Cov hydrogen fluoride tsim thaum lub sij hawm decomposition ntawm R134a reacts nrog calcium oxide los tsim calcium fluoride. Cov tshuaj calcium fluoride ruaj khov no ua ib zaj duab xis nyias ntawm cov catalyst nto, tiv thaiv cov catalyst thiab tiv thaiv nws los ntawm kev ua tsis tiav.
Cov catalyst tsim los ntawm pab pawg tshawb fawb tau khaws cia siab ntawm ntau dua 99% rau 100 teev, qhia txog kev ua haujlwm zoo heev. Los ntawm kev ziab thiab crushing yooj yim, 1 kg ntawm catalyst tuaj yeem tsim tau ib teev, uas yooj yim rau kev tsim khoom loj.
Txij li cov khoom siv raw yog siv cov khoom siv pov tseg, tsis muaj nqi, uas tuaj yeem txo cov nqi pov tseg thiab tsim cov nyiaj tau los ntxiv.
Dr. Li Xingen tau hais tias: "Cov av nkos liab yog cov khoom muaj zog alkaline uas yuav ua rau muaj kuab paug loj heev thaum tso tawm rau hauv ib puag ncig, tab sis tseem tsis tau muaj kev kho mob thiab siv cov cuab yeej tsim nyog. Cov khoom siv hluav taws xob tsim hluav taws xob uas peb tsim tsis tau tsuas yog siv cov khoom pov tseg thiab txo ib puag ncig. muaj kuab paug, tab sis kuj zoo decompose cov tub yees nrog lub tsev cog khoom muaj zog. "
