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Manje, bebhala ephephabhukwini iJoule, u-Ung Lee kanye nozakwabo babika ucwaningo lwesitshalo sokuhlola sokufaka i-hydrogenating carbon dioxide ukuze kukhiqizwe i-formic acid (K. Kim et al., Joule https://doi.org/10.1016/j. Joule.2024.01). 003;2024). Lolu cwaningo lubonisa ukwenziwa ngcono kwezinto eziningana ezibalulekile zenqubo yokukhiqiza. Ezingeni le-reactor, ukucatshangelwa kwezakhiwo ezibalulekile ze-catalyst ezifana nokusebenza kahle kwe-catalytic, i-morphology, ukuncibilika kwamanzi, ukuzinza kokushisa, kanye nokutholakala kwezinsizakusebenza ezinkulu kungasiza ekuthuthukiseni ukusebenza kwe-reactor ngenkathi kugcinwa inani elidingekayo le-feedstock liphansi. Lapha, ababhali basebenzise i-catalyst ye-ruthenium (Ru) esekelwa kuhlaka oluxubile lwe-triazine bipyridyl-terephthalonitrile (olubizwa ngokuthi i-Ru/bpyTNCTF). Bathuthukise ukukhethwa kwama-amine pair afanele ukuze kubanjwe futhi kuguqulwe i-CO2 ngempumelelo, bakhetha i-N-methylpyrrolidine (NMPI) njenge-amine esabelayo ukuze kubanjwe i-CO2 futhi kukhuthazwe ukusabela kwe-hydrogenation ukuze kwakheke i-formate, kanye ne-N-butyl-N-imidazole (NBIM) ukuze isebenze njenge-amine esabelayo. Ngemva kokuhlukanisa i-amine, i-formate ingahlukaniswa ukuze kukhiqizwe i-FA ngokwengeziwe ngokwakhiwa kwe-trans-adduct. Ngaphezu kwalokho, bathuthukise izimo zokusebenza kwe-reactor ngokuya ngokushisa, ingcindezi kanye nesilinganiso se-H2/CO2 ukuze kwandiswe ukuguqulwa kwe-CO2. Ngokuphathelene nomklamo wenqubo, bathuthukise idivayisi equkethe i-reactor yombhede ohamba kancane kanye namakholomu amathathu aqhubekayo okucwiliswa. I-bicarbonate esele iyacwiliswa kukholomu yokuqala; i-NBIM ilungiswa ngokwenza i-trans adduct kukholomu yesibili; umkhiqizo we-FA utholakala kukholomu yesithathu; Ukukhethwa kwezinto zokwakha i-reactor kanye nombhoshongo nakho kwacatshangelwa ngokucophelela, kwakhethwa insimbi engagqwali (SUS316L) yezingxenye eziningi, kanye nezinto zokwakha ezisekelwe ku-zirconium (Zr702) zesakhiwo sesithathu ukuze kuncishiswe ukugqwala kwe-reactor ngenxa yokumelana kwayo nokugqwala kokuhlanganiswa kukaphethiloli. , futhi izindleko ziphansi kakhulu.
Ngemva kokwenza inqubo yokukhiqiza ibe ngcono ngokucophelela—ukukhetha isitokwe sokudla esifanele, ukuklama i-reactor yombhede ohamba kancane kanye namakholomu amathathu aqhubekayo okucwilisa, ukukhetha ngokucophelela izinto zomzimba wekholomu kanye nokupakisha kwangaphakathi ukunciphisa ukugqwala, kanye nokulungisa kahle izimo zokusebenza ze-reactor—abalobi babonisa ukuthi isitshalo sokuhlola esinomthamo wansuku zonke we-10 kg sakhiwe ngokuhlanganiswa kukaphethiloli okwazi ukugcina ukusebenza okuzinzile amahora angaphezu kwe-100. Ngokusebenzisa ukuhlaziywa komjikelezo wokuphila ngokucophelela, isitshalo sokuhlola sanciphisa izindleko ngo-37% kanye nethuba lokufudumala komhlaba ngo-42% uma kuqhathaniswa nezinqubo zokukhiqiza zokuhlanganiswa kukaphethiloli zendabuko. Ngaphezu kwalokho, ukusebenza kahle kwenqubo kufinyelela ku-21%, futhi ukusebenza kahle kwamandla kufana nokwezimoto zamaseli kaphethiloli eziqhutshwa yi-hydrogen.
Qiao, M. Ukukhiqizwa kwe-pilot kwe-formic acid kusuka ku-hydrogenated carbon dioxide. Nature Chemical Engineering 1, 205 (2024). https://doi.org/10.1038/s44286-024-00044-2