Nyob rau hauv lub hom phiaj dual ntawm kev tiv thaiv niaj hnub - ib puag ncig kev tiv thaiv thiab kev ua haujlwm hydropentane tawm los ua cov khoom siv tseem ceeb hauv cov tub yees thiab ua npuas dej kev lag luam. Nrog rau kev nce thoob ntiaj teb ua tib zoo saib thiab kev nyab xeeb hloov kev hloov tshuaj thiab kev hloov pauv fluorocarbon, vim nws cov neeg ua lag luam ib puag ncig kev hloov pauv thiab kev hloov kho tshiab.
Cov yam ntxwv yooj yim thiab kev tsim cov cycloentane
Cyclotomentane (Tshuaj Mis Tsim C₅h₁₀) yog hom aliphatic hydrocarbon. Nyob rau hauv chav tsev kub, nws yog cov kua tsis muaj xim thiab pob tshab nrog cov ntxhiab tsw zoo sib xws rau roj. Nws cov qauv molecular yog tsib tus tswv cuab, thiab tus qauv txheej txheem tshwj xeeb no muab nws ruaj khov siab. Hauv kev lag luam tsim khoom, cyclotomentane feem ntau tau los ntawm catalytic hloov pauv thiab sib cais ua kom huv ntawm cov roj av, lossis tuaj yeem muab rho tawm los ntawm qee cov roj kev ua pa. Nrog kev nce qib ntawm cov txheej txheem thev naus laus zis, kev tsim khoom niaj hnub tuaj yeem ua tiav cov kev npaj loj (feem ntau yog li ntawm 95%) cyclopentane, uas lays lub foundation rau nws cov ntawv thov kev lag luam.
Hais txog cov khoom siv lub cev, lub boiling point ntawm cyclotomentane yog kwv yees li 49.2 degree, thiab nws qhov txias taw yog -93.9 degree. Cov yam ntxwv no ua rau nws yooj yim cia khaws thiab thauj ntawm qhov kub thiab txias thiab siab. Dab tsi yog qhov tshwj xeeb tshaj yog tias nws ozone depletion muaj peev xwm (ODP) tsuas yog 11 (uas yog qhov qis dua ntawm GWP tus nqi ntawm cov tub yees rau hauv lub teb chaws R134A). Qhov no ua rau nws ib puag ncig tus phooj ywg zoo uas ua raws li cov cai ntawm montreal raws tu qauv thiab Kigali hloov kho.
Cov ntawv thov tawm tsam hauv kev lag luam tub yees
Hauv cov teb ntawm cov tsev kawm ntawv cov tub yees, cyclopentane yog tsim kev hloov pauv ntsiag to. Txij li thaum xyoo 1990, European Union tau ua thawj zaug los txhawb kev ua npuas dej rau cov khoom siv hluav taws xob hauv tub yees rau hauv cov txheej txheem ua npuas dej Cov ntaub ntawv thov raug muab suav nrog cov tsev neeg hauv tsev qib siab xws li Bosch thiab Siemens. Tom qab lawv cov khoom txais yuav cov polyurethane rwb thaiv tsev txheej ua kom muaj nuj nqis, hluav taws xob ntau dua tsawg dua li 10-15%.
Raws li lub tub yees, cyclotomentane ua rau muaj txiaj ntsig tshwj xeeb hauv kev lag luam tub yees tub yees. Raws li cov ntaub ntawv los ntawm Asmeskas EPA, lub zog hluav taws xob piv (Cop) Cov tub yees txias tuaj yeem ncav cuag 3.5, uas yog kwv yees li ntawm HFC cov tshuab HFC. Lub cyclotomentane compound thev naus laus zis tsim los ntawm isobutane kom ua tiav cov khoom siv hauv tub yees, tau ua tiav cov txiaj ntsig hluav taws xob txhua xyoo.
Txawm li cas los xij, cov nplaim taws ntawm cyclopentane (nrog kev tawg txwv ntawm 1.4-8.7% xav tau tias cov khoom yuav tsum tau ua raws li ATEx tawg-ua pov thawj qauv. Cov koom haum European tawm tswv yim hais tias cov chaw uas yog cycloctane tshuab hluav taws xob yuav tsum tau nruab nrog kev saib xyuas kev saib xyuas lub zog ntawm lub zog li ntawm 2-3 xyoos.
Kev ua kom tawg nyob rau hauv Polyurethane Ua npuas ncauj kev lag luam
Hauv teb ntawm Polyurethane Rigid Ua Npuas Ncauj, Cyclopentane tau dhau los ua lub cev ua npuas ncauj. Raws li kev txheeb cais los ntawm Tuam Tshoj Polyurethane Kev Lag Luam Kev Lag Luam, hauv 2022, kev lag luam ntawm kev lag luam polyurethane nyob rau hauv 280% ntawm tag nrho cov ntaub ntawv ua npuas ncauj noj. Piv nrog HCFC-141B, lub thermal conductivity ntawm foamed cov laug cam uas muaj peev xwm tsawg li 0.022w / (map k), thiab lub zog ua npuas ncauj tau nce li ntawm 8%.
Hais txog thev naus laus zis tsim tawm, honeywell tsim lub cycloentane / Dej coaming thev naus laus zis. Los ntawm kev tswj cov tshuaj tiv thaiv kub thiab cov ntau ntawm cov catalyst, lub xov tooj uas kaw-cell ntawm lub npaus mus txog 92%. WANHUA tshuaj qhia kev nrawm nrawm qauv cyclopentane, uas tau txo cov pwm txuas los ntawm 30% thiab txhim kho kev txhim kho ntau dua. Cov kev nce qib no tau qhib cyclopentane foamed polyurethane yuav siv dav hauv liaj teb xws li lub tsev rwb thaiv tsev thiab xa hluav taws xob cov khaubncaws sab nraud povtseg.
Nyob rau hauv kev lag luam Automotive, cov khoom siv xws li cov nplaim hluav taws xob thiab lub rooj zaum ntawm lub voj voog tau dhau mus kuaj cov neeg siv hluav taws xob zoo li Volkswagen thiab Toyota. Cov nplaim hluav taws xob tshwj xeeb-retardant cycling siv nyob rau hauv lub bmw i Series hluav taws xob ua tau nyob rau hauv qhov ntsuas kub tau ruaj khov nyob rau hauv kub -40 mus txog 120 V-0 Hluav Taws Kub Kev Nyab Xeeb.
Kev nce roob cyclopentane qhia txog kev sib tw tag nrho ntawm cov kev hloov pauv ntawm cov kev hloov pauv ntawm greening. Txawm tias muaj kev nyuaj siab thiab txheej txheem ua haujlwm zoo, nws txoj kev ua tau zoo tshaj plaws thev naus laus zis yog ua rau nws tseem ceeb ntawm lub tswv yim txhim kho. Rau cov koom tes hauv kev lag luam, txeeb lub qhov rai ntawm kev hloov khoom siv thev naus laus zis txhais tau tias ib txhij zuj zus ntawm kev khwv nyiaj txiag thiab lub luag haujlwm ib puag ncig. Hauv kaum xyoo tom ntej, raws li ntiaj teb kev siv zog los txo cov pa roj carbon monissions yuav tsum ua kom pom cov thev naus laus zis thiab muaj feem xyuam nrog cov chaw dav dav.
