Gcwalisa ifomu elingezansi futhi sizokuthumela i-imeyili version ye-PDF ye- "New Technology Ukuthuthuka ukuguqula i-carbon dioioxide ibe ngophethiloli owuketshezi"
I-Carbon Dioxide (CO2) ingumkhiqizo wamafutha okushisa avuthayo kanye negesi eluhlaza ejwayelekile, engaguqulwa ibuyele kumafutha asebenzayo ngendlela esimeme. Indlela eyodwa ethembisa ukuguqula ukuphuma kwe-CO2 ku-Fuel feedstock kuyinqubo ebizwa ngokuthi ukuncishiswa kwe-electrochemical. Kepha ukuzohweba ngokuhweba, inqubo idinga ukwenziwa ngcono ukukhetha noma ukukhiqiza imikhiqizo efunwa kakhulu yekhabhoni. Manje, njengoba kubikwe ku-Journal National Energy, i-Lawrence Berkeley National Laboratory (Berkeley Lab) isungule indlela entsha yokuthuthukisa ingaphezulu le-Catalyst esetshenziselwa ukusabela okusizayo, ngaleyo ndlela kwandise ukukhetha kwenqubo.
"Yize sazi ukuthi ithusi liyindlela enhle kakhulu yalokhu kusabela, akunikezeli ukukhetha okuphezulu komkhiqizo owuthandayo," kusho u-Alexis, usosayensi omkhulu eMnyangweni Wezakhi Zamakhemikhali e-Berkeley Lab kanye ne-University of California, eBerkeley. Spell uthe. "Iqembu lethu lithole ukuthi ungasebenzisa imvelo yendawo yeCatalyst ukwenza amaqhinga ahlukahlukene ukuhlinzeka lolu hlobo lokukhetha."
Ezifundweni ezedlule, abacwaningi basungule izimo eziqondile ukuhlinzeka ngemvelo engcono kagesi neyomakhemikhali yokwakha imikhiqizo ecebile yekhabhoni ngenani lezentengiso. Kepha lezi zimo ziphikisana nemibandela eyenzeka ngokwemvelo kumaseli ajwayelekile kaphethiloli asebenzisa izinto ezenzelwe amanzi.
Ukuze unqume ukwakheka okungasetshenziswa emvelweni wamanzi weseli wamafutha, njengengxenye yephrojekthi ye-Energy Enerness Center ye-Energy Sula Sunlight Alliance, insimbi neqembu lakhe liphendukele ungqimba oluncane lwe-ionomer, oluvumela ama-molecule athile akhokhisiwe (i-ion) ukuze adlule. Khipha amanye ama-ion. Ngenxa yezakhiwo zazo zamakhemikhali ezikhethiwe, zilungele kakhulu ukuba nomthelela omkhulu kwi-microenvelo.
UChanyeon Kim, umcwaningi we-postdoctol eqenjini leBell kanye nomlobi wokuqala wephepha, okuhlongozwayo ukumboza ingaphezulu lama-catalysts ethusi ngama-ionomers amabili ajwayelekile, naiveion kanye nokuzimela. Iqembu lizimisele ukwenza lokho ukwenza lokho kufanele kuguqule imvelo eduze kwe-catalyst-kufaka phakathi i-PH kanye nenani lamanzi kanye ne-carbon dioxide-ngandlela thile ukuqondisa imikhiqizo ecebile. Imikhiqizo kanye namafutha e-liquid.
Abaphenyi basebenzise ungqimba omncane we-Ionomer ngamunye kanye nongqimba oluphindwe kabili lwama-inomers amabili kwifilimu yethusi elisekelwa yi-polymer impahla ukuze afake i-Electchemical Cell. Lapho ujova i-carbon dioxide ebandleni futhi ufake isicelo se-voltage, balinganisa inani eliphelele eligeleza ngebhethri. Ngemuva kwalokho balinganisa igesi noketshezi oluqoqwe endaweni yokugcina indawo eseduze ngesikhathi sokusabela. Kuleli cala elinezabelo ezimbili, bathola ukuthi imikhiqizo ye-carbon-rich yabalwa ngamaphesenti angama-80 amandla adliwayo okusabela ku-60% ecaleni elingabanjwanga.
"Le nhlanganisela ye-sandwich ihlinzeka ngokuhamba phambili komhlaba womabili: Ukukhetha komkhiqizo okuphezulu nomsebenzi ophakeme," kusho abeBell. Ingaphezulu eliphakeme le-Double-ungqimba alilungile kuphela ngemikhiqizo ecebile yekhabhoni, kodwa futhi likhiqiza futhi elinamandla njengamanje ngasikhathi sinye, okukhombisa ukwanda komsebenzi.
Abaphenyi baphetha ngokuthi impendulo ethuthukisiwe yaba umphumela wokuhlushwa okuphezulu kwe-CO2 ekuhlanganiseni ngqo ngaphezulu kwethusi. Ngaphezu kwalokho, ama-molecule akhokhiswa kabi aqoqana esifundeni phakathi kwalezi zilomers ezimbili ezizokhiqiza i-acidity yendawo ephansi. Le nhlanganisela ebiyelwa ukuhweba okuhlushwa okuhlushwayo okuvame ukwenzeka lapho kungekho khona amafilimu we-ionomer.
Ukuze uphinde uthuthukise ukusebenza kahle kokusabela, abacwaningi baphendukela kubuchwepheshe obufakazelwe ngaphambilini abangadingi ifilimu ye-Ionomer njengenye indlela yokwandisa i-CO2 naku-PH: voltage. Ngokusebenzisa i-voltage e-volsed ku-Iongomer Coating Coating e-Double, abacwaningi bathola ukwanda okungu-250% emikhiqizweni yekhabhoni-acebile kuqhathaniswa ne-voltage engafakwanga.
Yize abanye abacwaningi bagxila emsebenzini wabo ekwakhiweni kwama-catalysts amasha, ukutholakala kwe-catalyst akuthathi izimo ezisebenzayo. Ukulawula imvelo ku-Catalyst Surface kuyindlela entsha nehlukile.
"Asizange size sibe ne-catalyst entsha ngokuphelele, kepha sasebenzisa ukuqonda kwethu ama-kinetics reaction futhi sasebenzisa lolu lwazi ukusiholela ekucabangeni ngendlela yokuguqula imvelo yesayithi elithi Catalyst," kusho u-Adam Weber, unjiniyela omkhulu. Ososayensi emkhakheni wobuchwepheshe bamandla eBerkeley Laboratories kanye nomlobi wamaphepha.
Isinyathelo esilandelayo ukwandisa ukukhiqizwa kwama-catalysts ahlanganisiwe. Ukuhlolwa kokuqala kwe-Berkeley Lab Team Team Team kuhilela izinhlelo ezincane zemodeli eyisicaba, ezazilula kakhulu kunezinhlaka ezinkulu zendawo ye-porous ezidingekayo kwizicelo zokuhweba. "Akunzima ukufaka imali embonini endaweni eyisicaba. Kepha izindlela zokuhweba zingafaka amabhola amancane ethusi," kusho uBell. Ukungeza ungqimba lwesibili lokukhomba kuba yinselele. Kungenzeka ukuthi ukuxuba nokubeka izimbotshana ezimbili ndawonye kwi-solvent, futhi ngethemba lokuthi zihlukile lapho i-solvent iphuma. Kuthiwani uma bengakwenzi? UBell waphetha: "Sidinga nje ukuba sibe ngobuchule." Bheka kuKim C, Bui JC, Luo X nabanye. I-catalyst egcizelele i-micronvelorment ye-electro-ukuncishiswa kwe-CO2 kuma-multi-carbon products usebenzisa i-Double-Iong-Iong-Iongomer Coating on Copper. Amandla we-NAT. 2021; 6 (11): 1026-1034. doi: 10.1038 / S41560-021-00920-8
Le ndatshana iphinde yakhiwe kusuka kulokho okulandelayo. Qaphela: Kungenzeka ukuthi lokho kwahlelwa ngobude nokuqukethwe. Ngeminye imininingwane, sicela uthintane nomthombo okhonjiwe.
Isikhathi sePosi: Nov-22-2021
