Cika fom ɗin da ke ƙasa kuma za mu yi muku imel ɗin sigar PDF na "Sabuwar fasahar haɓakawa don canza carbon dioxide zuwa mai mai ruwa"
Carbon dioxide (CO2) shine samfurin kona burbushin mai da kuma iskar gas na yau da kullun, wanda za'a iya canza shi zuwa mai mai amfani cikin tsari mai dorewa. Hanya ɗaya mai ban sha'awa don canza hayaƙin CO2 zuwa kayan abinci na man fetur shine tsari da ake kira raguwar electrochemical. Amma don samun damar kasuwanci, ana buƙatar inganta tsarin don zaɓar ko samar da ƙarin abubuwan da ake so masu arzikin carbon. Yanzu, kamar yadda aka ruwaito a cikin mujallar Nature Energy, Lawrence Berkeley National Laboratory (Berkeley Lab) ya ɓullo da wata sabuwar hanya don inganta saman jan karfe mai kara kuzari da ake amfani da shi don taimakon taimako, ta yadda za a ƙara zaɓin tsarin.
"Ko da yake mun san cewa jan karfe shine mafi kyawun abin da ke haifar da wannan dauki, ba ya samar da babban zaɓi don samfurin da ake so," in ji Alexis, babban masanin kimiyya a Sashen Kimiyyar Kimiyya a Berkeley Lab kuma farfesa a fannin injiniyan sinadarai a Jami'ar. California, Berkeley. Spell ya ce. "Ƙungiyarmu ta gano cewa za ku iya amfani da yanayin gida na mai kara kuzari don yin dabaru daban-daban don samar da irin wannan zaɓi."
A cikin binciken da suka gabata, masu bincike sun kafa madaidaicin yanayi don samar da mafi kyawun yanayin lantarki da sinadarai don ƙirƙirar samfuran wadatar carbon tare da ƙimar kasuwanci. Amma waɗannan sharuɗɗan sun saba wa yanayin da ke faruwa a zahiri a cikin ƙwayoyin mai ta amfani da kayan sarrafa ruwa.
Don ƙayyade ƙirar da za a iya amfani da ita a cikin yanayin ruwan man fetur, a matsayin wani ɓangare na Cibiyar Ƙirƙirar Makamashi na Ma'aikatar Makamashi ta Liquid Sunshine Alliance, Bell da tawagarsa sun juya zuwa wani nau'i na ionomer na bakin ciki, wanda ya ba da damar wasu cajin. kwayoyin (ions) don wucewa. Cire sauran ions. Saboda kaddarorin sinadarai masu zaɓin su, sun dace musamman don samun tasiri mai ƙarfi akan ƙananan ƙwayoyin cuta.
Chanyeon Kim, wani mai bincike na postdoctoral a cikin kungiyar Bell kuma marubucin farko na takarda, ya ba da shawarar rufe saman abubuwan jan ƙarfe tare da ionomers guda biyu na kowa, Nafion da Sustainion. Tawagar ta yi hasashen cewa yin hakan ya kamata ya canza yanayin da ke kusa da mai kara kuzari—ciki har da pH da adadin ruwa da carbon dioxide — ta wata hanya don jagorantar amsa don samar da kayayyaki masu arzikin carbon da za a iya canzawa cikin sauƙi zuwa sinadarai masu amfani. Kayayyaki da makamashin ruwa.
Masu binciken sun yi amfani da wani siriri na kowane nau'in ionomer da wani nau'i biyu na ionomeers zuwa wani fim ɗin tagulla da ke da goyan bayan wani abu na polymer don samar da fim, wanda za su iya sakawa kusa da ƙarshen wani nau'i na lantarki mai siffar hannu. Lokacin shigar da carbon dioxide a cikin baturi da amfani da wutar lantarki, sun auna jimlar halin yanzu da ke gudana ta cikin baturin. Sannan sun auna iskar gas da ruwan da aka tattara a cikin tafki da ke kusa yayin da ake yin dauki. Ga shari'ar nau'i biyu, sun gano cewa samfuran carbon-carbon suna lissafin 80% na makamashin da aka cinye ta hanyar amsawa-fiye da 60% a cikin yanayin da ba a rufe ba.
"Wannan suturar sanwici tana ba da mafi kyawun duka duniyoyin biyu: babban zaɓi na samfur da babban aiki," in ji Bell. Hanya mai layi biyu ba kawai mai kyau ga samfurori masu arzikin carbon ba, amma kuma yana haifar da ƙarfin hali a lokaci guda, yana nuna karuwa a cikin aiki.
Masu binciken sun kammala cewa ingantaccen amsa shine sakamakon babban taro na CO2 da aka tara a cikin rufin kai tsaye a saman jan karfe. Bugu da ƙari, ƙwayoyin da ba su da cajin da suka taru a yankin tsakanin ionomers biyu za su haifar da ƙananan acidity na gida. Wannan haɗin gwiwar yana daidaita kasuwancin maida hankali wanda ke faruwa a cikin rashin fina-finai na ionomer.
Don ƙara haɓaka haɓakar haɓakawa, masu binciken sun juya zuwa fasahar da aka tabbatar da ita a baya wacce ba ta buƙatar fim ɗin ionomer a matsayin wata hanya don ƙara CO2 da pH: ƙarfin wutar lantarki. Ta hanyar amfani da wutar lantarki mai juzu'i zuwa rufin ionomer mai Layer biyu, masu binciken sun sami karuwar 250% a cikin samfuran wadatar carbon idan aka kwatanta da jan ƙarfe mara rufi da ƙarfin lantarki.
Ko da yake wasu masu binciken suna mayar da hankali kan aikinsu kan samar da sabbin abubuwa masu kara kuzari, gano mai kara kuzari baya la'akari da yanayin aiki. Sarrafa yanayi a saman mai kara kuzari sabuwar hanya ce kuma daban.
"Ba mu fito da wani sabon abin kara kuzari ba, amma mun yi amfani da fahimtarmu game da motsin motsin amsawa kuma muka yi amfani da wannan ilimin don jagorantar mu wajen tunanin yadda za mu canza yanayin wurin mai kara kuzari," in ji Adam Weber, wani babban injiniya. Masana kimiyya a fannin fasahar makamashi a Berkeley Laboratories da mawallafin takarda.
Mataki na gaba shine fadada samar da abubuwan da aka rufe. Gwaje-gwajen farko na ƙungiyar Lab na Berkeley sun haɗa da ƙananan tsarin ƙirar ƙira, waɗanda suka fi sauƙi fiye da sifofi mai girman yanki da ake buƙata don aikace-aikacen kasuwanci. “Ba shi da wahala a shafa abin rufe fuska. Amma hanyoyin kasuwanci na iya haɗawa da shafa ƙananan ƙwallo na jan karfe, "in ji Bell. Ƙara Layer Layer na biyu ya zama ƙalubale. Ɗaya daga cikin yuwuwar ita ce haɗawa da saka suturar biyu tare a cikin sauran ƙarfi, da fatan za su rabu lokacin da sauran ƙarfi ya ƙafe. Idan basuyi ba fa? Bell ya kammala: "Muna buƙatar zama mafi wayo." Koma zuwa Kim C, Bui JC, Luo X da sauransu. Keɓaɓɓen microenvironment mai haɓakawa don rage electro-raguwa na CO2 zuwa samfuran carbon da yawa ta amfani da murfin ionomer mai Layer biyu akan jan karfe. Nat Energy. 2021; 6 (11): 1026-1034. doi:10.1038/s41560-021-00920-8
An sake buga wannan labarin daga abu mai zuwa. Lura: Wataƙila an gyara kayan don tsayi da abun ciki. Don ƙarin bayani, tuntuɓi tushen da aka ambata.
Lokacin aikawa: Nuwamba-22-2021
