Abacwaningi eNyuvesi yaseChung-Ang eNingizimu Korea bafunda ngezinqubo zokubamba nokusetshenziswa kwekhabhoni besebenzisa imfucuza noma izinsiza zemvelo ezicebile njengezinto zokudla. Lokhu kuqinisekisa ukusebenza kahle kobuchwepheshe kwezomnotho.
Kulolu cwaningo olusha, ithimba eliholwa nguSolwazi Sungho Yoon kanye noSolwazi ohlangene uChul-Jin Lee bahlole ukusetshenziswa kwe-carbon dioxide yezimboni kanye ne-dolomite ukukhiqiza imikhiqizo emibili ethengiswayo: i-calcium formate kanye ne-magnesium oxide.
Ucwaningo, “Ukuguqulwa okunamandla kwama-ion e-magnesium ne-calcium kusuka ku-dolomite kube imikhiqizo ewusizo enenani elengeziwe kusetshenziswa i-carbon dioxide,” lwanyatheliswa kuyi-Journal of Chemical Engineering.
Ukushintsha kwesimo sezulu kuyindaba engathi sína edinga ukunakwa kuqala. Ngenxa yalokho, amazwe emhlabeni wonke athuthukisa izinqubomgomo zokunciphisa umthelela waso.
Isibonelo, i-European Union iphakamisa isethi ephelele yeziqondiso zokufeza ukungathathi hlangothi kwesimo sezulu ngo-2050. I-European Green Deal iphinde igcizelele ukubaluleka kokunciphisa ukukhishwa kwamagesi okushisa ukushisa.
Ngenxa yalokho, ososayensi bahlola ubuchwepheshe bokubamba nokusetshenziswa kwekhabhoni njengezindlela ezithembisayo zokwandisa isitoreji nokuguqulwa kwe-CO2 ngezindleko eziphansi.
Kodwa-ke, ucwaningo lomhlaba wonke mayelana nokubanjwa nokusetshenziswa kwekhabhoni lukhawulelwe kuma-conversion compounds angaba ngu-20.
Njengoba kunezinhlobonhlobo zemithombo yokukhishwa kwe-CO2, ukuba nohlu olubanzi lwamakhemikhali kubalulekile.
Lokhu kubonisa ukubaluleka kocwaningo olujulile lwezinqubo zokuguqulwa kwe-carbon dioxide enokugxila okuphansi.
Ocwaningweni olusha, ithimba lisebenzise i-catalyst (Ru/bpyTN-30-CTF) ukwengeza i-hydrogen ku-carbon dioxide. Umphumela waba imikhiqizo emibili enenani elongeziwe: i-calcium formate kanye ne-magnesium oxide.
I-calcium formate isetshenziswa njengesithako sikasimende, isithako sokuhlanza, kanye nesithako sokudla kwezilwane, kanye nezinye izinto ezisetshenziswayo njengokushiswa kwesikhumba.
Inqubo ekhiqizwe yithimba ayigcini nje ngokuba nokwenzeka, kodwa futhi ishesha kakhulu, ikhiqiza umkhiqizo ngemizuzu emihlanu kuphela ekushiseni kwegumbi.
Phakathi kwezinye izinto, abacwaningi balinganisela ukuthi le nqubo inganciphisa amandla okufudumala komhlaba ngo-20% uma kuqhathaniswa nezindlela zendabuko zokukhiqiza i-calcium formate.
"Kukhona intshisekelo ekhulayo yokusebenzisa i-carbon dioxide ukukhiqiza imikhiqizo ebalulekile engasiza ekunciphiseni imiphumela yokushintsha kwesimo sezulu ngenkathi ikhiqiza izinzuzo zomnotho."
USolwazi Yoon uthe: “Ngokuhlanganisa ukusabela kwe-carbon dioxide hydrogenation kanye nokusabela kwe-cation exchange, kuye kwasungulwa inqubo yokuhlanza ama-metal oxides ngasikhathi sinye futhi kukhiqizwe i-formate ewusizo.”
Abacwaningi bahlole ukuthi indlela yabo ingathatha indawo yezindlela zokukhiqiza zamanje. Ukuze benze lokhu, bafunde ngomthelela wezemvelo kanye nokuphila kahle kwezomnotho kwezindlela zokuguqula i-CO2 eziqhubekayo.
“Ngokusekelwe emiphumeleni, singasho ukuthi indlela yethu iyindlela engcono kakhulu yokuguqula i-carbon dioxide engathatha indawo yezindlela zendabuko futhi isize ekunciphiseni ukukhishwa kwe-carbon dioxide yezimboni,” kuchaza uSolwazi Yin.
Nakuba amathuba okuguqula i-carbon dioxide ibe imikhiqizo ngendlela eqhubekayo ethembisa, lezi zinqubo azilula ngaso sonke isikhathi ukuzikhulisa.
Iningi lobuchwepheshe be-CCU alukakathengiswa ngoba ukusebenza kwalo kwezomnotho kuphansi uma kuqhathaniswa nezinqubo zendabuko zezentengiselwano.
"Kudingeka sihlanganise inqubo ye-CCU nokusetshenziswa kabusha kwemfucuza ukuze izuzise imvelo kanye nezomnotho. Lokhu kungasiza ekufinyeleleni imigomo yokukhipha ukungcola okungenayo igesi esikhathini esizayo," kuphetha uDkt. Lee.
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