Qhov sib txawv tseem ceeb ntawm HCFC thiab HFC yog tias HCFC muaj cov tshuaj chlorine thiab tuaj yeem ua rau muaj kev phom sij rau cov txheej txheem ozone, qhov HFC tsis muaj tshuaj chlorine thiab tsis ua mob rau cov txheej txheem ozone.
HCFCs thiab CFCs yog cov pa roj uas tau ua haujlwm tam sim no los ntawm kev siv vim muaj kev xav txog kev puas tsuaj uas lawv tuaj yeem ua rau ozone txheej ntawm stratosphere. HFC yog qhov hloov pauv zoo rau cov roj no, feem ntau hauv cov tub yees.
HCFC yog dab tsi?
HCFC yog hais txog hydrochlorofluorocarbon. Nws yog ib chav kawm ntawm cov tebchaw uas muaj cov qauv tshuaj zoo ib yam li CFC. Txawm li cas los xij, tsis zoo li CFC, cov tebchaw no muaj hydrogen atoms, ntxiv rau cov pa roj carbon, fluorine thiab chlorine atoms. Raws li ib txwm muaj, cov no yog cov pa roj lossis cov kua evaporative heev. Feem ntau, lawv ruaj khov thiab tsis ua haujlwm.
Cov tshuaj no yog cov khoom siv tau zoo heev rau CFCs. Lawv muaj txiaj ntsig zoo li cov tub yees thiab hauv insulative foams. Txawm li cas los xij, tib neeg tsis siv lawv los ua cov kuab tshuaj, thiab ntau lub tebchaws tsim kho tau txwv tsis pub siv los ua cov kuab tshuaj. Qhov tseem ceeb tshaj, cov tebchaw no tsis muaj kev cuam tshuam tam sim ntawd rau ib puag ncig tom qab tso tawm rau ib puag ncig. Vim lawv qhov xwm txheej tsis hloov pauv, lawv tuaj yeem koom nrog cov tshuaj tiv thaiv uas tsim ozone nyob rau theem qis, uas tuaj yeem ua rau cov nroj tsuag puas tsuaj. Txij li thaum lawv tsis ruaj khov li CFC thiab tsis tas li nyob rau hauv cov huab cua, qhov cuam tshuam ntawm huab cua tsawg heev. Txawm li cas los xij, cov tebchaw no tseem tuaj yeem xaus rau hauv huab cua sab saud, ua rau qeeb qeeb ntawm ozone.
HFC yog dab tsi?
HFC yog hydrofluorocarbon. Cov no yog manmade organic compounds uas muaj fluorine thiab hydrogen atoms. Nws yog hom organofluorine ntau tshaj plaws uas tshwm sim feem ntau hauv cov roj theem ntawm chav tsev kub. Cov pa roj no feem ntau yog siv rau hauv cov cua txias thiab ua cov tub yees. E.g. R-134a yog ib hom HCF refrigerant. Cov tebchaw no tau txais los hloov CFCs uas muaj zog ntau dua kom rov qab tau cov txheej txheem stratospheric ozone. Ntxiv mus, cov roj no tuaj yeem hloov cov chlorofluorocarbons qub xws li R-12 thiab HCFCs xws li R-21. Tsis tas li ntawd, HFCs muaj txiaj ntsig zoo hauv insulating foams, aerosol propellants, ua cov kuab tshuaj thiab tiv thaiv hluav taws.
Daim duab 01: Difluoroethane, HFC Compound
Txawm hais tias cov pa roj no tsis ua mob rau cov txheej txheem ozone ntau npaum li HCFCs thiab CFCs, lawv tuaj yeem ua rau lub ntiaj teb sov sov vim tias lawv muaj peev xwm ua kom sov siab (ntau dua li carbon dioxide). Txawm li cas los xij, kev koom tes ntawm cov pa roj carbon monoxide no rau anthropogenic tsev cog khoom roj emissions yog nce sai, uas tuaj yeem ua rau muaj kev txhawj xeeb thoob ntiaj teb txog cov hluav taws xob quab yuam ntawm cov roj no.
Qhov txawv ntawm HCFC thiab HFC yog dab tsi?
HCFC thiab HFC yog cov tshuaj organofluorine uas tshwm sim hauv cov roj theem ntawm chav tsev kub. HCFC hais txog hydrochlorofluorocarbon, thaum HFC hais txog hydrofluorocarbon. Qhov sib txawv tseem ceeb ntawm HCFC thiab HFC yog tias HCFC muaj cov tshuaj chlorine thiab tuaj yeem ua rau muaj kev phom sij rau cov txheej txheem ozone, thaum HFC tsis muaj tshuaj chlorine thiab tsis ua mob rau cov txheej txheem ozone. Tsis tas li ntawd, HCFC raug txiav tawm los ntawm kev siv tam sim no thaum HFC tau siv los hloov HCFC thiab CFC roj. Ntxiv mus, HCFC muaj cov tshuaj chlorine thiab fluorine thaum HFC tsis muaj tshuaj chlorine, tab sis muaj fluorine.
Cov duab hauv qab no qhia qhov sib txawv ntawm HCFC thiab HFC hauv daim ntawv teev npe.
Summary – HCFC vs HFC
HCFC thiab HFC yog cov tshuaj organofluorine uas tshwm sim hauv cov roj theem ntawm chav tsev kub. HCFC yog hais txog hydrochlorofluorocarbon, thaum HFC yog hydrofluorocarbon. Qhov sib txawv tseem ceeb ntawm HCFC thiab HFC yog tias HCFC muaj cov tshuaj chlorine thiab tuaj yeem ua rau muaj kev phom sij rau txheej txheej ozone, hos HFC tsis muaj tshuaj chlorine thiab tsis ua mob rau cov txheej txheem ozone.
