I-Ethylene glycol (EG), ikhemikhali eyintloko kwimveliso ye-polyester, iifomyula ze-antifreeze, kunye nee-resin zoshishino, ibona uphuhliso olutshintshayo oluqhutywa ziimfuneko zozinzo kunye nophuhliso lwetekhnoloji. Utshintsho lwamva nje kwiindlela zemveliso, uhlaziyo lomthetho, kunye nokusetyenziswa okutsha kuyayitshintsha indima yayo kwicandelo leekhemikhali lehlabathi.
1. Ulwahlulo lweMifanekiso eluhlaza
Inkqubela phambili kubuchwepheshe bokuguqula i-catalytic iguqula imveliso ye-ethylene glycol. Abaphandi base-Asia baphuhlise i-catalyst entsha esekelwe kwi-copper eguqula i-syngas (umxube we-hydrogen kunye ne-carbon monoxide) ngqo kwi-ethylene glycol ene-95% yokukhetha, idlula ii-intermediates ze-ethylene oxide zendabuko. Le ndlela inciphisa ukusetyenziswa kwamandla nge-30% kwaye inciphisa ukukhutshwa kwe-CO₂ nge-1.2 yeetoni ngetoni ye-EG eveliswayo.
Le nkqubo, ngoku eseluvavanyweni lovavanyo, ihambelana neenjongo zehlabathi zokususa iicarbonization kwaye inokuphazamisa iindlela zemveli zokuvelisa ezixhomekeke kwifosili. Ukuba ilinganisiwe, inokwenza izityalo ze-ethylene glycol zihlangane ngokungenamthungo neenkqubo zokubamba iicarbon, zibeke i-EG njenge "khemikhali eluhlaza" enokubakho kwiindlela zokubonelela ezijikelezayo.
2. I-Ethylene Glycol Esekelwe kwiBio ifumana amandla okutsala
Ngenxa yokwanda kwemfuno yezinto ezizinzileyo, i-ethylene glycol esekwe kwi-bio ephuma kwi-moba okanye kwi-corn starch iyavela njengendlela efanelekileyo. Iphulo elidibeneyo lakutshanje eMzantsi Melika libonise ukuba kunokwenzeka ukubilisa inkunkuma yezolimo kwi-monoethylene glycol (MEG) ene-carbon footprint ephantsi ngama-40% kune-equivalents esekelwe kwi-petroleum.
Ishishini lempahla, eliyinkampani enkulu ye-EG, liqhuba i-bio-MEG kwimveliso yefayibha ye-polyester, iziphumo zakuqala zibonisa amandla okuxinana afanayo kunye nokuhambelana kwedayi. Izikhuthazo zomthetho, ezifana ne-EU's Renewable Carbon Initiative, ziyakhawulezisa ukwamkelwa, nangona imingeni ejikeleze ukwandiswa kwempahla kunye nokulingana kweendleko isaqhubeka.
3. Uhlolo lweMithetho yoKurisayikilisha i-EG
Iinkxalabo ezikhulayo malunga nokuqina kwe-ethylene glycol kwindalo zibangele imithetho eqinileyo. Ngo-Okthobha ka-2023, i-US EPA icebise izikhokelo ezihlaziyiweyo zokukhupha amanzi amdaka aqulethe i-EG, iyalela iinkqubo eziphambili ze-oxidation ukuba zonakalise ii-glycols eziseleyo ngaphantsi kwe-50 ppm. Kwangaxeshanye, i-European Union ibhala uhlaziyo kwisakhelo sayo soBhaliso, uVavanyo, ukuVunyelwa, kunye nokuThintelwa kweeKhemikhali (REACH), ifuna abavelisi ukuba bangenise idatha yobuthi beemveliso ze-EG ngo-2025.
La manyathelo ajolise ekusombululeni iingozi zendalo, ngakumbi kwiindawo eziphilayo zasemanzini, apho ukuqokelelwa kwe-EG kuye kwanxulunyaniswa nokuncipha kweoksijini kwiindawo zamanzi.
4. Usetyenziso Olutsha Kwindawo Yokugcina Amandla
I-ethylene glycol ifumana uncedo olungalindelekanga kwiinkqubo zokugcina amandla zesizukulwana esilandelayo. Iqumrhu lophando eYurophu liyile i-coolant yebhetri engatshiyo isebenzisa umxube wamanzi we-EG oguquliweyo, nto leyo ephucula ulawulo lobushushu kwiibhetri ze-lithium-ion nge-25%. Le fomyula, esebenza kakuhle kwi--40°C ukuya kwi-150°C, iyavavanywa kwiiprototypes zezithuthi zombane kunye neeyunithi zokugcina igridi.
Ukongeza, izixhobo zokutshintsha isigaba ezisekwe kwi-EG (ii-PCM) zifumana ingqalelo yokugcina amandla obushushu belanga, kwaye izilingo zakutshanje zifezekisa ukusebenza kakuhle kwe-92% yamandla ngaphezulu kwemijikelo engama-500.
5. Ukumelana neCandelo loNikezelo kunye noShishino lweSithili
Ukungavisisani kwezopolitiko kunye nemiqobo yezothutho kukhuthaze ukuveliswa kwe-ethylene glycol kwiindawo ezahlukeneyo. Izakhiwo ezintsha kuMbindi Mpuma nakuMzantsi-mpuma we-Asia zamkela iiyunithi zemveliso ezincinci, ezilungiselelwe ukufumaneka kokutya kwasekuhlaleni, nto leyo enciphisa ukuxhomekeka kwizityalo ezinkulu ezikwindawo enye. Olu tshintsho luncediswa ziinkqubo zolawulo lwezinto ezisetyenzisiweyo eziqhutywa yi-AI ezinciphisa inkunkuma ye-EG kumacandelo asezantsi afana nokuveliswa kweebhotile ze-PET.
Isiphelo: Uphuhliso Oluneenkalo Ezininzi
Icandelo le-ethylene glycol limi kwindawo edibana kuyo iintambo, lilungelelanisa ubutyebi balo obuzinzileyo bemizi-mveliso neemfuno ezingxamisekileyo zokuzinza. Utshintsho kwi-green synthesis, ezinye iindlela ezisekelwe kwi-bio, kunye nokusetyenziswa koqoqosho olujikelezayo kuyayichaza ngokutsha ikhonkco layo lexabiso, ngelixa imithetho engqongqo igxininisa imfuneko yeendlela ezinoxanduva lokusingqongileyo. Njengoko ishishini leekhemikhali lijikeleza ukuya ekususeni i-carbonization, ukuguquguquka kwe-ethylene glycol kuya kumisela ukubaluleka kwayo kwimarike eguquka ngokukhawuleza.
Ixesha leposi: Epreli-07-2025