IiHydrofluoroolefins (iiHFO) ziludidi lweekhemikhali ezimele isizukulwana sesine seegesi ezifakwe ifluorinated. Ezi zinto zenzelwe ngokukodwa ukunciphisa impembelelo yokusingqongileyo ngelixa zigcina imigangatho yokusebenza efunekayo kwizicelo ezahlukeneyo zoshishino. IiHFO ziye zabaluleka ngakumbi njengeefriji,iiarhente zokuvuthela, iipropellants, kunye nezinyibilikisi, ezibonelela ngenye indlela ezinzileyo kunezo zangaphambili.
Zithini ii-HFO?
Ii-HFO ziikhompawundi ze-organic ezingagcwaliyo ezenziwe zii-athomu ze-hydrogen, i-fluorine, kunye ne-carbon. Ulwakhiwo lwazo lweekhemikhali ezingagcwaliyo, olune-bond enye ephindwe kabini phakathi kwee-athomu ze-carbon, luyazahlula kwizizukulwana zangaphambili zeegesi ezifakwe i-fluorinated, ezifana nee-hydrofluorocarbons (ii-HFCs) kunye nee-chlorofluorocarbons (ii-CFCs). Olu mahluko kwisakhiwo lwenza ii-HFO zingazinzi kakhulu emoyeni, nto leyo ezenze zikwazi ukuqhekeka ngokukhawuleza kwaye zinciphise kakhulu amandla azo okufudumala kwehlabathi (i-GWP).
Usetyenziso lwee-HFO
Ii-HFOs zisetyenziswa ngeendlela ezahlukeneyo kwaye zisetyenziswa kumashishini aphambili aliqela:
Iifriji
I-HFO isetyenziswa kakhulu kwiinkqubo zokukhenkcisa kunye nezomoya ngenxa yokuba iphantsi kakhulu kwi-GWP kunye nokusebenza kakuhle kwamandla. Umzekelo, isetyenziswa kakhulu kwiinkqubo zokukhenkcisa iimoto nakwiinkqubo zokukhenkcisa zorhwebo.
Kwimveliso ye-polyurethane foam, i-HFO isetyenziswa njenge-ejenti yokuvuthela ukwandisa nokwenza ulwakhiwo lwe-foam. Ii-ejenti zokuvuthela ezisekelwe kwi-Hfo, ezifana ne-HFO-1336mzz(Z), ziyathandwa ngenxa yeempawu zazo zokugquma ubushushu kunye nomgangatho omncinci wokusingqongileyo, nto leyo eyenza ukuba zifaneleke kwi-spray foam insulation kunye nemveliso yebhodi eqinileyo.
Izinto ezibangela uqhushululu
Ii-HFO zisetyenziswa njengee-propellant kwizicelo ze-aerosol, kuquka iimveliso zokhathalelo lomntu, amayeza, kunye nee-spray zemizi-mveliso. I-GWP yazo ephantsi kunye nokungatshi kwazo kuzenza zikhuseleke kwaye zibe nobuhlobo nokusingqongileyo kunee-propellant zemveli ezifana nee-HFC.
Izinyibilikisi
Iifomyula ezithile ze-HFO zisetyenziswa njengezinyibilikisi kwiinkqubo zokucoca izimboni, zibonelela ngamandla aphezulu okunyibilikisa kunye nokunciphisa ubuthi kunye neengozi zokusingqongileyo.
Iingenelo ze-HFOs
Ii-HFOs ziyamkelwa ngokubanzi ngenxa yeenzuzo zazo ezininzi:
Amandla Okufudumala Kwehlabathi Aphantsi (i-GWP):
Ii-HFO zine-GWPs eziqala ngaphantsi kwe-1 ukuya kwi-10, ukwehla okukhulu xa kuthelekiswa nee-HFCs, ezinokuba ne-GWPs ezidlula i-1,000. Oku kwenza ii-HFOs zibe sisixhobo esibalulekileyo ekulweni notshintsho lwemozulu.
Ixesha elifutshane loBomi boMmoya:
Njengoko ubomi bomoya bulinganiswa ngeentsuku ukuya kwiiveki, ii-HFO zinciphisa iimpembelelo zexesha elide kokusingqongileyo xa kuthelekiswa nee-HFC kunye nee-CFC, ezihlala iminyaka okanye amashumi eminyaka.
Ukuthobela iMithetho:
Ii-HFOs zihambelana namanyathelo olawulo lwehlabathi afana ne-Kigali Amendment to the Montreal Protocol, eyalela ukuba kuncitshiswe ukusetyenziswa kwezinto ezine-GWP ephezulu.
Ukonga Amandla:
Iinkqubo ezisebenzisa ii-refrigerants ze-HFO zihlala zibonisa ukusebenza kakuhle kwamandla, zinciphisa iindleko zokusebenza kwaye zinciphisa ngakumbi ukukhutshwa kwekhabhoni.
Ukhuseleko kunye nokuhambelana:
Ii-HFO ngokubanzi azinabungozi kwaye ziyahambelana neenkqubo ezikhoyo ezenzelwe ii-HFC, nto leyo eququzelela utshintsho olulula kumashishini.
Isiphelo
I-Hydrofluoroolefin (HFO) yinkqubela phambili ebalulekileyo kwicandelo leegesi ezifakwe i-fluorinated, ejongana nemingeni yokusingqongileyo kunye nokusebenza. Indima yabo kwiifriji, ii-air agents, ii-propellants kunye nezinyibilikisi igxininisa ukuguquguquka kwazo kunye nokubaluleka kwazo kushishino lwanamhlanje. Ngokuqhubeka nokuvelisa izinto ezintsha kunye nokunamathela kwiiNjongo zokuZinzisa zehlabathi, i-HFO ikulungele ukukhokela utshintsho oluya kwikamva eliluhlaza nelizinzileyo.
Ixesha leposi: Novemba-27-2024