Lembani fomu ili m'munsiyi ndipo tidzakutumizirani imelo ya mtundu wa PDF wa "Maluso atsopano aukadaulo osinthira mpweya wa carbon dioxide kukhala mafuta amadzimadzi"
Mpweya woipa wa carbon dioxide (CO2) umachokera ku mafuta oyaka moto komanso mpweya wowonjezera kutentha, womwe ungathe kusinthidwa kukhala mafuta othandiza m'njira yokhazikika. Njira imodzi yodalirika yosinthira kutulutsa kwa CO2 kukhala masheya amafuta ndi njira yotchedwa electrochemical reduction. Koma kuti zitheke malonda, ndondomekoyi iyenera kukonzedwa kuti isankhe kapena kupanga zinthu zomwe zimafunidwa kwambiri za carbon. Tsopano, monga momwe tafotokozera m'magazini ya Nature Energy, Lawrence Berkeley National Laboratory (Berkeley Lab) yapanga njira yatsopano yowonjezeretsa pamwamba pa chothandizira chamkuwa chomwe chimagwiritsidwa ntchito pothandizira, potero akuwonjezera kusankhidwa kwa ndondomekoyi.
"Ngakhale tikudziwa kuti mkuwa ndiwomwe umathandizira kwambiri pakuchita izi, supereka kusankha kwakukulu kwa chinthu chomwe tikufuna," adatero Alexis, wasayansi wamkulu mu dipatimenti ya Chemical Sciences ku Berkeley Lab komanso pulofesa waukadaulo wamankhwala ku yunivesite. ku California, Berkeley. Spell anatero. "Gulu lathu lidawona kuti mutha kugwiritsa ntchito malo omwe amathandizira kuti muchite zanzeru zosiyanasiyana kuti mupange chisankho chotere."
M'maphunziro am'mbuyomu, ofufuza adakhazikitsa mikhalidwe yolondola kuti apereke malo abwino kwambiri amagetsi ndi mankhwala kuti apange zinthu zokhala ndi kaboni wokhala ndi mtengo wamalonda. Koma izi ndizosemphana ndi zomwe zimachitika mwachilengedwe m'ma cell amafuta omwe amagwiritsa ntchito zida zopangira madzi.
Pofuna kudziwa mapangidwe omwe angagwiritsidwe ntchito m'malo opangira mafuta, monga gawo la polojekiti ya Energy Innovation Center ya Liquid Sunshine Alliance ya Unduna wa Zamagetsi, Bell ndi gulu lake adatembenukira kukhala wosanjikiza wopyapyala wa ionomer, womwe umalola kuti pakhale mlandu wina. mamolekyu (mayoni) kuti adutse. Kupatula ma ions ena. Chifukwa cha mankhwala awo osankhidwa kwambiri, ali oyenerera makamaka kukhala ndi mphamvu pa microenvironment.
Chanyeon Kim, wofufuza za postdoctoral mu gulu la Bell komanso wolemba woyamba wa pepalali, akufuna kuti avale pamwamba pa zopangira zamkuwa ndi ma ionomer awiri wamba, Nafion ndi Sustainion. Gululo linaganiza kuti kutero kuyenera kusintha chilengedwe pafupi ndi chothandizira-kuphatikizapo pH ndi kuchuluka kwa madzi ndi carbon dioxide-mwanjira ina kuti atsogolere zomwe zimachitika kuti apange mankhwala opangidwa ndi carbon omwe angasinthidwe mosavuta kukhala mankhwala othandiza. Zogulitsa ndi mafuta amadzimadzi.
Ofufuzawo adagwiritsa ntchito kagawo kakang'ono ka ionomer iliyonse ndi magawo awiri a ionomers awiri ku filimu yamkuwa yothandizidwa ndi zinthu za polima kuti apange filimu, yomwe angakhoze kuyiyika pafupi ndi mapeto amodzi a selo lopangidwa ndi dzanja la electrochemical cell. Akalowetsa mpweya woipa mu batire ndikuyika mphamvu yamagetsi, amayezera kuchuluka komwe kukuyenda mu batire. Kenako anayeza gasi ndi madzi amene anasonkhanitsidwa mu nkhokwe moyandikana pamene anachita. Pamilandu iwiriyi, adapeza kuti zinthu zokhala ndi mpweya wa carbon zimakhala ndi 80% ya mphamvu zomwe zimadyedwa ndi zomwe zimachitika-zapamwamba kuposa 60% pazochitika zosatsekedwa.
"Kupaka masangweji kumeneku kumapereka zabwino kwambiri padziko lonse lapansi: kusankha kwazinthu zambiri komanso kuchita zambiri," adatero Bell. Pamwamba pawiri sibwino kokha kwa zinthu zopangidwa ndi carbon, komanso zimapanga mphamvu yamphamvu panthawi imodzimodziyo, kusonyeza kuwonjezeka kwa ntchito.
Ofufuzawo adawona kuti kuyankha bwinoko kudachitika chifukwa cha kuchuluka kwa CO2 komwe kudasonkhanitsidwa mu zokutira mwachindunji pamwamba pa mkuwa. Kuphatikiza apo, mamolekyu osanjikiza omwe amawunjikana m'chigawo pakati pa ma ionomer awiriwa amatulutsa acidity yocheperako. Kuphatikizikaku kumathetsa kusinthanitsa kwamalingaliro komwe kumachitika pakalibe mafilimu a ionomer.
Pofuna kupititsa patsogolo luso la zomwe anachita, ofufuzawo adatembenukira kuukadaulo wotsimikiziridwa kale womwe sufuna filimu ya ionomer ngati njira ina yowonjezerera CO2 ndi pH: voteji yamagetsi. Pogwiritsa ntchito ma pulsed voltage pawiri wosanjikiza ionomer zokutira, ofufuzawo adapeza chiwonjezeko cha 250% pazinthu zokhala ndi mpweya wa kaboni poyerekeza ndi mkuwa wosanjidwa ndi magetsi osasunthika.
Ngakhale kuti ochita kafukufuku ena amayang'ana ntchito yawo pakupanga zopangira zatsopano, kutulukira kwa chothandizira sikuganizira momwe ntchito zikuyendera. Kulamulira chilengedwe pa chothandizira pamwamba ndi njira yatsopano komanso yosiyana.
"Sitinabwere ndi chothandizira chatsopano, koma tinagwiritsa ntchito kamvedwe kathu ka zochita za kinetics ndikugwiritsa ntchito chidziwitsochi kutitsogolera poganiza za momwe tingasinthire chilengedwe cha malo othandizira," anatero Adam Weber, injiniya wamkulu. Asayansi pankhani yaukadaulo wamagetsi ku Berkeley Laboratories komanso wolemba nawo mapepala.
Chotsatira ndikukulitsa kupanga zopangira zomatira. Zoyeserera zoyambilira za gulu la Berkeley Lab zinali ndi kachitidwe kakang'ono kosalala, komwe kunali kophweka kwambiri kuposa kabowo kakang'ono kofunikira pazamalonda. “Sikovuta kupaka zokutira pamalo athyathyathya. Koma njira zamalonda zingaphatikizepo kuvala timipira tating'ono ta mkuwa, "adatero Bell. Kuwonjezera gawo lachiwiri la zokutira kumakhala kovuta. Kuthekera kumodzi ndiko kusakaniza ndi kuyika zokutira ziwirizo pamodzi mu zosungunulira, ndikuyembekeza kuti zimasiyana pamene zosungunulirazo zasanduka nthunzi. Bwanji ngati satero? Bell anamaliza kuti: “Tiyenera kukhala anzeru kwambiri.” Onani Kim C, Bui JC, Luo X ndi ena. Customize catalyst microenvironment pofuna kuchepetsa ma elekitirodi a CO2 ku zinthu za carbon yambiri pogwiritsa ntchito zokutira zamitundu iwiri ya ionomer pa mkuwa. Zotsatira Nat Energy. 2021;6(11):1026-1034. doi:10.1038/s41560-021-00920-8
Nkhaniyi yapangidwanso kuchokera kuzinthu zotsatirazi. Zindikirani: Zomwe zalembedwazo zitha kusinthidwa kutalika ndi zomwe zili. Kuti mudziwe zambiri, chonde lemberani gwero lomwe latchulidwa.
Nthawi yotumiza: Nov-22-2021
