Ukuvuselelwa kabusha njengoshintsho lwesimo sezulu: Abacwaningi e-TU Wien bakhiqize i-nanocatalyst ngamabhethri amadala kanye nezinsalela ze-aluminium foil, ezingasetshenziswa ukuguqula i-CO2 emoyeni ibe yi-methane.
Imfucuza yebhethri iyinkinga engathi sína yendawo ezungezile: Iqukethe izinto ezibeka impilo yomuntu engozini kanye nesimiso semvelo. Ngesikhathi esifanayo, iqukethe nezinto ezibalulekile njenge-nickel, esiyidinga ngokuphuthumayo—ngokwesibonelo, ukuze kukhiqizwe amabhethri amasha. Ngakho-ke izindlela ezingcono zokugaywa kabusha kwebhethri zidingeka ngokushesha.
I-Vienna University of Technology manje isiphumelele ukwenza inqubo ekwazi ukubuyisela i-nickel kumabhethri e-nickel-metal hydride asetshenzisiwe. Kodwa akupheleli lapho: Kusukela kulokhu kumosheka kwebhethri kanye ne-aluminium foil esetshenzisiwe, evame ukusetshenziswa emakhishini, baphumelele ukukhiqiza i-nanocatalyst eguqula i-CO2 isuka emoyeni ibe yi-methane. Ngale ndlela, inkinga yemfucuza ingancishiswa ngenkathi ngesikhathi esifanayo ikhiqiza uphethiloli ongathathi hlangothi kwesimo sezulu.
"Amabhethri esimanje, njenge-nickel-metal hydride (NiMH) kanye namabhethri e-lithium-ion, aqukethe izingxenye ezihlukahlukene, okwenza izinqubo zokuvuselela nokubuyisela zibe inselele kwezobuchwepheshe," kusho uProf Günther Rupprechter we-Institute of Materials Chemistry e-TU Wien, inhloko yephrojekthi yocwaningo. "Ukulahlwa ngendlela engafanele kungaholela ekuvuzeni kwamakhemikhali, imililo, kanye nokungcoliswa kwemvelo."
Ukutholwa kwe-nickel kumabhethri e-Ni-MH asetshenzisiwe nakho kubaluleke kakhulu ngokomnotho: E-EU, amabhethri asetshenzisiwe kanye nezilahlwa ezivela ekukhiqizeni ibhethri kunganikeza cishe amaphesenti angu-2030 e-nickel edingekayo ngo-16, eyanele ukuhlomisa izimoto zikagesi eziyizigidi ezingu-1,3 kuya kwezingu-2,4 (EVs) ngonyaka.
Ngaphandle kwalokhu okungaba khona, amandla amanje okugaywa kabusha e-EU nase-UK acishe abe ingxenye eyodwa kweziyishumi yalokho okuzodingeka ngo-2030. Ukutshalwa kwezimali kwingqalasizinda yokugaya kabusha kuyadingeka. "Ukugaywa kabusha kuyisinyathelo esibalulekile, kodwa umthelela omkhulu nakakhulu ungafinyelelwa ngokunyusa i-nickel ibe ama-catalysts akwazi ukukhiqiza amafutha," kusho uDkt. Qaisar Maqbool, umbhali oholayo wocwaningo.
Ithimba likhiphe i-nickel kumabhethri e-Ni-MH asetshenzisiwe laphinde lakhiqiza i-aluminium oxide ephepheni elisetshenzisiwe le-aluminium. Lezi zinto zabe seziguqulwa zaba i-nanocatalyst enamandla kusetshenziswa izindlela ezivumelana nemvelo—izindlela zamakhemikhali aluhlaza. "I-nanocatalyst yethu iqukethe amaphesenti angama-92 kuya kwangu-96 e-aluminium oxide kanye namaphesenti amane kuya kwayisishiyagalombili e-nickel, elungele ukuguqula igesi ebamba ukushisa i-CO2 ibe yi-methane kanye ne-hydrogen," kuchaza uGünther Rupprechter. Inqubo ayidingi ukucindezela okuphezulu noma amazinga okushisa aphezulu; i-catalyst isebenza ngomfutho ojwayelekile womkhathi kanye nezinga lokushisa elifinyeleleka kalula elingu-250°C.
Lokhu kunikeza indlela yokuguqula i-CO2 ibe uphethiloli obalulekile ngendlela engathathi hlangothi kwesimo sezulu: I-Methane, isibonelo, idlala indima ebalulekile njengomthwali wamandla embonini. "Manje sifuna ukuphenya ukuthi le nqubo ingakhuliswa kanjani ekusetshenzisweni kwezobuchwepheshe," kusho uProf Günther Rupprechter. "Sikholelwa ukuthi le ndlela ingashintsha ukukhiqizwa kukaphethiloli okusimeme. Indlela yethu ibonisa isisombululo senkinga yesimo sezulu - futhi ikwenza ngendlela efanayo ngesikhathi esisodwa kusiza ukuxazulula inkinga ecindezelayo yemfucuza."
Ama-catalyst amaningi ayacisha ngokuhamba kwesikhathi—ngoba i-catalyst iba nezinguquko zesakhiwo noma ingasebenzi kahle ngenxa yokwakheka kwezinto zangaphandle. Akukho ukuvalwa okunjalo okubonwe ocwaningweni. Noma kunjalo, bekubalulekile eqenjini ukuthi licabange ngemijikelezo evaliwe futhi licabangele ukuthi i-catalyst ngokwayo ingabuyekezwa kanjani.
"Ukuvala i-loop yokusimama, ama-catalyst asetshenzisiwe angahlukaniswa abe yizingxenye zawo zangempela ukuze ziphinde zisetshenziswe," kusho uDkt. Qaisar Maqbool. Lokhu kuqinisekisa ukuthi yonke inqubo ihlala ihambisana nemvelo futhi kunciphisa imfucuza.
Ukushicilelwa kwangempela
Ukuvuselela Imfucuza Eyingozi ibe Ama-Catalyst E-Ni/?-Al2O3 Asebenza Kakhulu E-CO2 Methanation
Qaisar Maqbool, Hamilton Uchenna Aharanwa, Michael Stöger-Pollach, Günther Rupprechter Green Chemistry
Funda futhi
Isistimu yokushisisa yamangqamuzana kaphethiloli isebenza kusukela ngo-2004 | I-Pugnalom
Abacwaningi be-Empa bahlose ukukhipha izinqubo zokushisa okuphezulu | I-Pugnalom
