I-atikili le ibuyekezwe ngokuya kweenkambiso nemigomo yokuhlela ye-Science X. Abahleli bagandelele iimfanelo ezilandelako ngesikhathi baqinisekisa ukuthembeka kokuqukethwe:
I-Carbon dioxide (CO2) mthombo oqakathekileko wokuphila ephasini begodu mrhasi we-greenhouse ofaka isandla ekufuthumeleni kwephasi. Namhlanjesi, abososayensi bafunda nge-carbon dioxide njengomthombo othembisako wokukhiqiza amafutha avuselelekako, ane-carbon encani nemikhiqizo yamakhemikhali ebiza khulu.
Inselele yabarhubhululi kuthola iindlela ezisebenzako nezingabiziko zokutjhugulula i-carbon dioxide ibe zizinto eziphakathi zekhabhoni ezisezingeni eliphezulu ezifana ne-carbon monoxide, i-methanol nofana i-formic acid.
Isiqhema serhubhululo esidoswa phambili ngu-KK Neuerlin we-National Renewable Energy Laboratory (NREL) nabasebenzisani be-Argonne National Laboratory ne-Oak Ridge National Laboratory bathole isisombululo esithembisako somraro lo. Isiqhema sakha indlela yokutjhugulula ukukhiqiza i-formic acid ukusuka kukhabhoni dioksayidi ngokusebenzisa igezi evuselelekako enekghono eliphezulu lamandla nokuhlala isikhathi eside.
Irhubhululo, elinesihloko esithi "Ukwakhiwa kwe-electrode ye-membrane elinganisekako yokutjhugulula i-electrochemical ephumelelako ye-carbon dioxide ibe yi-formic acid," yavezwa encwadini ye-Nature Communications.
I-formic acid mhlobo wamakhemikhali ongasetjenziswa eendaweni ezinengi, khulukhulu njengesisetjenziswa esingakasetjenzwa emabubulweni wamakhemikhali nofana wezinto eziphilako. I-formic acid nayo ikhonjwe njengesisetjenziswa sokuhlanza i-bio ibe ziimbaseli ezihlanzekileko zeenqhema zeenqhema zeenqhema.
I-Electrolysis ye-CO2 kuphumela ekunciphiseni kwe-CO2 ibe makhemikhali aphakathi afana ne-formic acid nofana amamolekhyuli afana ne-ethylene lokha nakufakwa amandla kagesi eselini le-elekthrolithikhi.
I-membrane-electrode assembly (MEA) ku-electrolyzer ivamise ukuba ne-ion-conducting membrane (i-cation nofana i-anion exchange membrane) ehlanganiswe hlangana nama-electrode amabili ane-electrocatalyst kanye ne-ion-conducting polymer.
Ngokusebenzisa ubuchwepheshe besiqhema emathekhnolojini wamaseli we-fuel kanye ne-hydrogen electrolysis, bafunda ukuhleleka kwe-MEA okunengi kumaseli we-electrolytic ukumadanisa ukwehliswa kwe-elekthrokhemikhali ye-CO2 ukuya ku-formic acid.
Ngokuya ngokuhlaziywa kokubhalelwa kwemiklamo ehlukahlukeneko, isiqhema safuna ukusebenzisa ukulinganiselwa kwamasethi wezinto ezikhona, khulukhulu ukutlhogeka kokulahlwa kwe-ayoni kuma-membrane wokutjhentjhana kwe-anion yamanje, nokwenza lula umklamo wesistimu yoke.
Ukuthonywa ngu-KS Neierlin no-Leiming Hu be-NREL bekuyi-MEA electrolyzer ethuthukisiweko esebenzisa i-cation exchange membrane etja. I-membrane enembobo le inikela ukukhiqizwa kwe-formic acid okungaguqukiko, okukhethiweko begodu yenza kube lula ukuklanywa ngokusebenzisa izinto ezingathengwa.
"Imiphumela yesifundo lesi itjengisa ukutjhuguluka kwendlela yokukhiqiza amakhemikhali we-electrochemical wama-organic acid afana ne-formic acid," kwatjho umtloli osebenzisana naye u-Neierlin. "Isakhiwo se-membrane esinembobo sinciphisa ubudisi bemiklamo yangaphambilini begodu singasetjenziselwa nokwenza ngcono ukusetjenziswa kwamandla nokuqina kwamanye amadivayisi wokuguqula i-carbon dioxide."
Njenganoma ngiyiphi ipumelelo yezesayensi, kuqakathekile ukuzwisisa izinto ezibizako kanye nokukghonakala kwezomnotho. Ukusebenza eminyangweni yoke, abarhubhululi be-NREL u-Zhe Huang no-Tao Ling bethula ukuhlaziywa kwezobuchwepheshe nezomnotho okukhomba iindlela zokufezekisa ukulingana kweendleko neenkambo zokukhiqiza i-formic acid yamabubulo yanamhlanjesi lokha iindleko zegezi evuselelekako zingaphasi kwamasenti ama-2.3 nge-kilowatt-hour.
"Isiqhema sizuze imiphumela le sisebenzisa ama-catalysts atholakala emabhizinisini kanye nezinto ezisetjenziswa nge-polymer membrane, ngesikhathi senza umklamo we-MEA osebenzisa ithuba lokukhula kwamaseli we-fuel wesimanjemanje kanye namaplanti we-hydrogen electrolysis," kutsho u-Neierlin.
"Imiphumela yocwaningo ingasiza ukutjhugulula i-carbon dioxide ibe ziimbaseli namakhemikhali kusetjenziswa igezi evuselelekako ne-hydrogen, okurhabisa ukutjhugulukela ekukhuphukeni nasekuthengiseni."
Ithekhnoloji yokutjhugulula i-elekthrokhemikhali yinto eqakathekileko yehlelo le-NREL lama-elekthroni ukuya kuma-molekyuli, eliqale khulu i-hydrogen evuselelekako yesizukulwana esilandelako, amafutha angasebenziko, amakhemikhali kanye nezinto zokusebenzisa iinkambo eziqhutshwa mtjhini.
"Ihlelo lethu lihlola iindlela zokusebenzisa igezi evuselelekako ukutjhugulula amamolekhyuli afana ne-carbon dioxide namanzi abe makhompawundi angasebenza njengemithombo yamandla," kutjho u-Randy Cortright, umnqophisi we-NREL yokudlulisa i-elekthronikhi kanye/nofana isu lokukhiqiza amafutha. nofana amakhemikhali.”
"Irhubhululo lokutjhugulula i-elekthrokhemikhali linikela ngempumelelo engasetjenziswa eenkambisweni ezinengi zokutjhugulula i-elekthrokhemikhali, begodu silindele imiphumela emihle khulu evela esiqhemeni lesi."
Ilwazi elinabileko: U-Leiming Hu et al., Ukwakhiwa kwe-elekthrodi ye-membrane elinganisekako yokutjhugulula i-CO2 ibe yi-formic acid, i-Nature Communications (2023). DOI: 10.1038/s41467-023-43409-6
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