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Ukuba uguqula i-CO2 ibe yigesi ye-synthesis, ufumana i-raw material exabisekileyo kwishishini lemichiza. Abaphandi kwi-TU Wien babonisa indlela oku kusebenza ngayo nakwiqondo lobushushu begumbi kunye noxinzelelo lwe-ambient.
Nabani na ocinga nge-CO2 mhlawumbi uya kucinga ngokukhawuleza amagama anjengengozi kwimozulu okanye kwimveliso yenkunkuma. Ngelixa i-CO2 yayikhona ixesha elide - imveliso yenkunkuma enyulu - ngakumbi nangakumbi iinkqubo ziyaphuhliswa apho igesi ye-greenhouse inokuguqulwa ibe yimathiriyeli yexabiso ekrwada. I-chemistry ke ithetha "ngeekhemikhali ezongeziweyo". Isixhobo esitsha esenza ukuba oku kwenzeke siphuhliswe kwiYunivesithi yaseVienna yeTekhnoloji kwaye kutshanje kuboniswe kwijenali yoNxibelelwano lweKhemistry.
Iqela lophando likaDominik Eder livelise izinto ezintsha eziququzelela ukuguqulwa kwe-CO2. Ezi zii-MOCHAs - ezi zikhompawundi ze-organometallic chalcogenolate ezisebenza njengezinto ezincedayo. Isiphumo sokuguqulwa kwe-electrochemical yigesi ye-synthesis, okanye i-syngas ngokufutshane, into ebalulekileyo ekrwada kwishishini lemichiza.
I-CO2 iba yigesi yokudibanisa
I-Syngas ngumxube we-carbon monoxide (CO), i-hydrogen (H2) kunye nezinye iigesi kwaye isetyenziswa njengento ekrwada kwezinye izinto. Enye yezona ndawo zibalulekileyo zokusetyenziswa kukuveliswa kwesichumisi, apho i-ammonia iveliswa kwi-gas ye-synthesis. Nangona kunjalo, inokusetyenziselwa ukuveliswa kwamafutha afana nedizili okanye ukuveliswa kwemethanol, esetyenziswa kwiiseli zamafutha. Kuba ukutsalwa kwe-CO2 kwiatmosfera kunamandla kakhulu, kuyavakala ukukhupha i-CO2 kwizityalo zamashishini. Ukusuka apho ke ingasebenza njengesixhobo sokuqala kwiikhemikhali ezahlukeneyo.
Nangona kunjalo, iindlela zangaphambili zifuna amaqondo obushushu aphezulu kunye noxinzelelo kunye neecatalysts ezibizayo. Abaphandi baseViennese ke ngoko bakhangela izinto ezincedayo apho i-syngas inokuthi iveliswe kumaqondo obushushu aphantsi kunye noxinzelelo lwe-ambient. "Ii-MOCHAs zisebenza ngokungafaniyo ne-catalysts esetyenziswayo ukuza kuthi ga ngoku: Esikhundleni sokushisa, umbane unikezelwa ukuze kusebenze i-catalyst kwaye uqalise ukuguqulwa kwe-CO2 kwi-gas synthesis," kuchaza iNkokheli yeqela leJunior uDogukan Apaydin, ophethe iindlela zokuguqula i-CO2 kwi-gas. uphando lweqela lophando.
I-MOCHAs njengabasombululi beengxaki
Ii-MOCHA zenza iklasi yezixhobo ezaphuhliswa phantse kwiminyaka engama-20 eyadlulayo, kodwa ayikafumani nasiphi na isicelo. Izixhobo ze-organic-inorganic hybrid ke ngoko ziye zafumana ukuthandwa kwiminyaka yakutshanje. Abaphandi be-TU baqaphela amandla e-MOCHA njengezinto ezikhuthazayo kwaye baqhuba iimvavanyo kunye nabo okokuqala. Nangona kunjalo, baye bajongana neengxaki ezininzi: Iindlela zangaphambili zokudibanisa zivelise kuphela ixabiso elincinci lemveliso kwaye zifuna ixesha elininzi. "Ukusebenzisa indlela yethu yokudibanisa, sakwazi ukwandisa kakhulu inani lemveliso kunye nokunciphisa ubude bexesha ukusuka kwi-72 ukuya kwiiyure ezintlanu," kuchaza u-Apaydin inkqubo yokuvelisa inoveli ye-MOCHAs.
Iimvavanyo zokuqala zibonise ukuba ukusebenza kwe-catalytic ye-MOCHAs ekuveliseni igesi ye-synthesis esuka kwi-CO2 ifaniswa ne-catalysts esekwe ngoku. Ukongeza, bafuna amandla amancinci kakhulu kuba yonke impendulo inokuqhutywa kwiqondo lobushushu begumbi. Ukongeza, ii-MOCHA zibonakalise ukuba zizinzile kakhulu. Zingasetyenziswa kwii-solvents ezahlukeneyo, kumaqondo okushisa ahlukeneyo, okanye phantsi kweemeko ezahlukeneyo ze-pH, kwaye zigcine imilo yazo nangemva kwe-catalysis.
Nangona kunjalo, kukho iiparamitha apho iqela elijikeleze iDogukan Apaydin kunye nomfundi ogqirha uHannah Rabl lisaphanda. Ukusebenzisa i-electrode efanayo amaxesha amaninzi ukuhambisa amandla ngendlela yangoku kubonisa ukuhla okuncinci ekusebenzeni. Indlela uxhulumaniso phakathi kwe-MOCHA kunye ne-electrode inokuphuculwa ngakumbi ukukhusela oku kwehla ekusebenzeni ngoku kuphandwa kwiimvavanyo zexesha elide. "Sisekwinqanaba lokuqala lokufaka isicelo," utshilo uDogukan Apaydin. “Ndiyakuthanda ukuthelekisa oku nenkqubo yelanga, leyo kwiminyaka engama-30 eyadlulayo yayintsonkothe kakhulu yaye kubiza kakhulu ukuyivelisa kunokuba kunjalo namhlanje. Ngesiseko esifanelekileyo kunye nentando yezopolitiko, nangona kunjalo, ii-MOCHA nazo zinokusetyenziswa ngokubanzi kwixesha elizayo ekuguquleni i-CO2 kwi-gas ye-synthesis kwaye ngaloo ndlela yenze igalelo labo ekukhuselweni kwemozulu, "u-Apaydin uqinisekile.
