I-Ethylene glycol (EG), ikhemikhali eyitshe legumbi ekukhiqizweni kwe-polyester, ukwakhiwa kwe-antifreeze, kanye nezinsalela zezimboni, ibona intuthuko eguquguqukayo eqhutshwa izimfuneko zokusimama nentuthuko yezobuchwepheshe. Izinqubo ezintsha zakamuva ezindleleni zokukhiqiza, izibuyekezo zokulawula, kanye nezinhlelo zokusebenza zamanoveli zilungisa kabusha indima yazo emkhakheni wamakhemikhali womhlaba.
1. Ukuthuthukiswa Kokuhlanganiswa Okuhlaza
Impumelelo kubuchwepheshe bokuguqula i-catalytic iguqula ukukhiqizwa kwe-ethylene glycol. Abacwaningi base-Asia benze i-catalyst enoveli esekwe ngethusi eguqula i-syngas (ingxube ye-hydrogen ne-carbon monoxide) iqonde ngqo ku-ethylene glycol ene-95% yokukhetha, idlule i-ethylene oxide yendabuko. Le ndlela inciphisa ukusetshenziswa kwamandla ngo-30% futhi inciphisa ukukhishwa kwe-CO₂ ngamathani angu-1.2 ngethani ngalinye le-EG elikhiqizwayo.
Inqubo, manje esesivivinyweni sokuhlola, iqondana nezinjongo ze-global decarbonization futhi ingase iphazamise imizila evamile yokukhiqiza encike ezinsalela ezimbiwa phansi. Uma kulinganiswa, kungase kuvumele izitshalo ze-ethylene glycol ukuthi zihlangane ngaphandle komthungo nezinhlelo zokuthwebula i-carbon, ukubeka i-EG njengento engaba "ikhemikhali eluhlaza" kumaketanga okunikezwayo ayindilinga.
2. I-Ethylene Glycol Esekelwe ku-Bio Izuza Ukudonsa
Phakathi kwesidingo esikhulayo sezinto ezisimeme, i-ethylene glycol esekelwe ku-bio etholakala kumoba noma isitashi sombila ivela njengenye indlela esebenzayo. Isinyathelo sakamuva esihlanganyelwe eNingizimu Melika sikhombise ukuba nokwenzeka kokuvutshelwa kwemfucuza yezolimo ku-monoethylene glycol (MEG) enekhabhoni ephansi ngo-40% kunezilinganiso ezisekelwe ku-petroleum.
Imboni yezindwangu, umthengi omkhulu we-EG, ihlola i-bio-MEG ekukhiqizeni i-polyester fiber, ngemiphumela yokuqala ekhombisa amandla okushuga okuqatha kanye nokuhambisana kwedayi. Izikhuthazo ezingokomthetho, ezifana ne-EU's Renewable Carbon Initiative, ziyasheshisa ukutholwa, nakuba izinselele mayelana nokwanda kwe-feedstock nokulinganisa kwezindleko ziqhubeka.
3. Ukucutshungulwa Kokulawulwa Kwe-EG Recycling
Ukukhathazeka okukhulayo ngokuphikelela kwemvelo kwe-ethylene glycol kuye kwabangela imithetho eqinile. Ngo-Okthoba 2023, i-US EPA yaphakamisa imihlahlandlela ebuyekeziwe yokuchithwa kwamanzi angcolile aqukethe i-EG, eyala izinqubo ze-oxidation ezithuthukisiwe zokwehlisa isithunzi sama-glycol asele ngaphansi kuka-50 ppm. Ngesikhathi esifanayo, i-European Union ibhala isibuyekezo sohlaka lwayo Lokubhalisa, Ukuhlola, Ukugunyazwa, kanye Nokukhawulelwa Kwamakhemikhali (REACH), okudinga ukuthi abakhiqizi bathumele idatha yobuthi yemikhiqizo ye-EG ngo-2025.
Lezi zinyathelo zihlose ukubhekana nezingozi zemvelo, ikakhulukazi ezindaweni eziphila emanzini, lapho ukunqwabelana kwe-EG kuye kwaxhunyaniswa nokuncipha komoyampilo emizimbeni yamanzi.
4. Izicelo Ezinoveli Ekugcineni Amandla
I-Ethylene glycol ithola usizo olungalindelekile ezinhlelweni zokugcina amandla esizukulwaneni esilandelayo. Inhlangano yocwaningo e-Europe yenze isipholiso sebhethri esingashi sisebenzisa inhlanganisela eguquliwe ye-EG-water, ethuthukisa ukuphathwa okushisayo kumabhethri e-lithium-ion ngo-25%. Ukwakheka, okusebenza kahle ku--40°C kuya ku-150°C, kuyahlolwa kuma-prototypes emoto kagesi namayunithi okugcina esikali segridi.
Ukwengeza, izinto zokushintsha kwesigaba ezisekelwe ku-EG (ama-PCM) zithola ukunakwa kwesitoreji samandla ashisayo elanga, ngovivinyo lwakamuva oluzuze ukugcinwa kwamandla okungama-92% ngaphezu kwemijikelezo engu-500.
5. Ukusimama Kochungechunge Lokuhlinzeka Ngempahla kanye Nokushintsha Kwesifunda
Ukungezwani kwezepolitiki kanye nezingqinamba ze-logistics kugqugquzele ukuhlukaniswa kwesifunda kokukhiqizwa kwe-ethylene glycol. Izakhiwo ezintsha eMpumalanga Ephakathi naseNingizimu-mpumalanga ye-Asia zamukela amayunithi okukhiqiza ajwayelekile, amancane alungiselelwe ukutholakala kwesitoko sasendaweni, okunciphisa ukuthembela ezitshalweni ezinkulu ezimaphakathi. Lolu shintsho luhambisana nezinhlelo zokuphatha izinto ezisetshenziswa yi-AI ezinciphisa udoti we-EG emikhakheni engezansi njengokukhiqiza amabhodlela e-PET.
Isiphetho: I-Multifaceted Evolution
Umkhakha we-ethylene glycol umi empambanweni yemigwaqo, ulinganisela insiza yawo yezimboni egxilile kanye nezidingo eziphuthumayo zokusimama. Ukuqanjwa okusha kokuhlanganisa okuluhlaza, okunye okusekelwe ku-bio-based, kanye nezinhlelo zokusebenza zomnotho eziyindilinga zichaza kabusha uchungechunge lwazo lwenani, kuyilapho imithetho eqinile igcizelela isidingo sezinqubo ezibhekelela imvelo. Njengoba imboni yamakhemikhali ibhekela ku-decarbonization, ukuzivumelanisa nezimo kwe-ethylene glycol kuzonquma ukuhlobana kwayo emakethe ethuthukayo ngokushesha.
Isikhathi sokuthumela: Apr-07-2025