Option
Uma uguqula i-CO2 ibe igesi yokuhlanganisa, uthola impahla eluhlaza eyigugu embonini yamakhemikhali. Abacwaningi e-TU Wien bakhombisa ukuthi lokhu kusebenza kanjani ngisho nasezingeni lokushisa elivamile kanye nengcindezi ye-ambient.
Noma ubani ocabanga nge-CO2 cishe uzocabanga ngokushesha ngamagama anjengokulimaza isimo sezulu noma udoti. Ngenkathi i-CO2 ikhona isikhathi eside - umkhiqizo wemfucuza omsulwa - izinqubo eziningi ziyathuthukiswa lapho igesi ebamba ukushisa ingashintshwa ibe izinto zokusetshenziswa ezibalulekile. I-chemistry ibe ikhuluma "ngamakhemikhali e-value-added". Impahla entsha eyenza lokhu kwenzeke yathuthukiswa e-Vienna University of Technology futhi isanda kwethulwa kujenali Yezokuxhumana Kwekhemikhali.
Iqembu locwaningo lika-Dominik Eder lenze into entsha eyenza ukuguqulwa kwe-CO2. Lawa ama-MOCHA - lawa ama-organometallic chalcogenolate compounds asebenza njengama-catalyst. Umphumela wokuguqulwa kwe-electrochemical igesi yokuhlanganisa, noma i-syngas ngamafuphi, okuyingxenye ebalulekile yokusetshenziswa kwemboni yamakhemikhali.
I-CO2 iba igesi ye-synthesis
I-Syngas iyingxube ye-carbon monoxide (CO), i-hydrogen (H2) namanye amagesi futhi isetshenziswa njengempahla eluhlaza kwezinye izinto. Enye yezinkambu ezibaluleke kakhulu zokusetshenziswa ukukhiqizwa komanyolo, lapho i-ammonia ikhiqizwa khona ngegesi yokuhlanganisa. Kodwa-ke, ingasetshenziselwa futhi ukukhiqiza izinto zokubasa ezifana nodizili noma ukukhiqizwa kwe-methanol, esetshenziswa kuma-fuel cell. Njengoba ukukhishwa kwe-CO2 emkhathini kudla amandla, kunengqondo ukukhipha i-CO2 ezitshalweni zezimboni. Ngakho-ke, ingasebenza njengesiqalo samakhemikhali ahlukahlukene.
Nokho, izindlela zangaphambili zidinga amazinga okushisa aphezulu nokucindezela kanye nama-catalyst abizayo. Ngakho-ke abacwaningi base-Viennese basesha ama-catalyst lapho ama-syngas angabuye akhiqizwe emazingeni okushisa aphansi kanye nokucindezela kwe-ambient. "Ama-MOCHA asebenza ngendlela ehlukile kunama-catalysts asetshenziswa kuze kube manje: Esikhundleni sokushisa, ugesi unikezwa ukuze kusebenze i-catalyst futhi kuqalwe ukuguqulwa kwe-CO2 ibe yigesi ye-synthesis," kuchaza umholi we-Junior Group u-Dogukan Apaydin, ophethe izindlela zokuguqula i-CO2 ku- ucwaningo lweqembu.
Ama-MOCHA njengabaxazululi bezinkinga
Ama-MOCHA enza ikilasi lezinto ezisetshenziswayo ezakhiwa cishe eminyakeni engama-20 edlule, kodwa abengakatholi noma yiluphi uhlelo lokusebenza. Ngakho-ke, izinto ze-organic-inorganic hybrid zithole ukuthandwa eminyakeni yamuva nje. Abacwaningi be-TU babone amandla e-MOCHA njengama-catalyst futhi benza izivivinyo ngawo okokuqala ngqa. Nokho, babhekana nenani lezinkinga: Izindlela zangaphambili zokuhlanganisa zazikhiqiza amanani amancane omkhiqizo futhi zidinga isikhathi esiningi. "Sisebenzisa indlela yethu yokuhlanganisa, sikwazile ukwandisa kakhulu inani lomkhiqizo futhi sinciphise ubude besikhathi kusuka ku-72 kuya emahoreni amahlanu," kuchaza u-Apaydin inqubo yokukhiqiza inoveli yama-MOCHA.
Ukuhlola kokuqala kubonise ukuthi ukusebenza kwe-catalytic kwama-MOCHA ekukhiqizeni igesi yokuhlanganiswa kusuka ku-CO2 kuqhathaniswa nama-catalysts asungulwe kuze kube manje. Ngaphezu kwalokho, zidinga amandla amancane kakhulu njengoba konke ukusabela kungenziwa ekamelweni lokushisa. Ngaphezu kwalokho, ama-MOCHA afakazele ukuthi azinze ngokwedlulele. Zingasetshenziswa kuma-solvents ahlukene, emazingeni okushisa ahlukene, noma ngaphansi kwezimo ze-pH ezihlukene, futhi zigcine ukuma kwazo ngisho nangemva kwe-catalysis.
Noma kunjalo, kukhona amapharamitha ithimba elizungeze i-Dogukan Apaydin kanye nomfundi ofundela ubudokotela u-Hannah Rabl elisacwaninga. Ukusebenzisa ama-electrode afanayo izikhathi eziningi ukuletha amandla ngendlela yamanje kubonisa ukwehla kancane kokusebenza. Ukuthi ukuxhumana phakathi kwama-MOCHA nama-electrode kungathuthukiswa kanjani ngokwengeziwe ukuze kuvinjelwe lokhu kwehla kokusebenza manje kuyacwaningwa ekuhlolweni kwesikhathi eside. "Sisesigabeni sokuqala sokufaka isicelo," kusho uDogukan Apaydin. “Ngithanda ukuqhathanisa lokhu namasistimu kanozungezilanga, eminyakeni engu-30 edlule ayeyinkimbinkimbi futhi ebiza kakhulu ukuwakhiqiza kunanamuhla. Ngengqalasizinda efanele kanye nentando yezombangazwe, noma kunjalo, ama-MOCHA angasetshenziswa kabanzi esikhathini esizayo ekuguquleni i-CO2 ibe yigesi yokuhlanganiswa futhi ngaleyo ndlela enze umnikelo wawo ekuvikelweni kwesimo sezulu, "u-Apaydin uqinisekile.
