Abaphandi kwiYunivesithi yaseChung-Ang eMzantsi Korea bafunda ngeenkqubo zokubamba nokusebenzisa ikhabhoni besebenzisa inkunkuma okanye izixhobo zemvelo ezityebileyo njengezondlo. Oku kuqinisekisa ukuba ubuchwepheshe busebenza kakuhle kwezoqoqosho.
Kolu phando lutsha, iqela elikhokelwa nguNjingalwazi Sungho Yoon kunye noNjingalwazi oNcedisayo uChul-Jin Lee bahlolisise ukusetyenziswa kwekhabhoni diokside yemizi-mveliso kunye nedolomite ukuvelisa iimveliso ezimbini ezithengiswayo: i-calcium formate kunye ne-magnesium oxide.
Olu phononongo, “Ukuguqulwa Okunamandla kweDolomite Magnesium kunye neCalcium Ions zibe ziimveliso eziluncedo ezongeziweyo ezisebenzisa iCarbon Dioxide,” lupapashwe kwiJenali yoBunjineli beKhemikhali.
Utshintsho lwemozulu yingxaki enkulu ekufuneka inikwe ingqalelo ephambili. Ngenxa yoko, amazwe kwihlabathi liphela aphuhlisa imigaqo-nkqubo yokunciphisa impembelelo yalo.
Umzekelo, i-European Union icebisa uluhlu olubanzi lwezikhokelo zokufezekisa ukungathathi cala kwemozulu ngo-2050. Isivumelwano se-European Green sikwagxininisa ukubaluleka kokunciphisa ukukhutshwa kwegesi ezibangela ukufudumala komhlaba.
Ngenxa yoko, izazinzulu zihlola iteknoloji yokubamba nokusebenzisa ikhabhoni njengendlela ethembisayo yokwandisa ukugcinwa kunye nokucutshungulwa kwekhabhoni dayokhsayidi ngexabiso eliphantsi.
Nangona kunjalo, uphando lwehlabathi malunga nokubanjwa kunye nokusetyenziswa kwekhabhoni lukhawulelwe kwiikhompawundi ezingama-20 zokuguqulwa.
Ngenxa yokwahluka kwemithombo yokukhupha i-CO2, ukuba noluhlu olubanzi lweekhompawundi kubalulekile.
Oku kubonisa ukubaluleka kophando olunzulu lweenkqubo zokuguqulwa kwekharbon dioxide enoxinzelelo oluphantsi.
Kolu phando lutsha, iqela lisebenzise i-catalyst (Ru/bpyTN-30-CTF) ukongeza i-hydrogen kwi-carbon dioxide. Isiphumo saba ziimveliso ezimbini ezongeziweyo: i-calcium formate kunye ne-magnesium oxide.
I-calcium formate isetyenziswa njengesongezelelo sesamente, i-deicer, kunye nesongezelelo sokutya kwezilwanyana, kunye nezinye izinto ezinje ngokupenda isikhumba.
Inkqubo yeqela ayipheleli nje ekubeni yenzeke, kodwa ikwakhawuleza kakhulu, ivelisa imveliso ngemizuzu emihlanu kuphela kubushushu begumbi.
Phakathi kwezinye izinto, abaphandi baqikelela ukuba le nkqubo inokunciphisa amandla okufudumala kwehlabathi ngama-20% xa kuthelekiswa neendlela zemveli zokuvelisa i-calcium formate.
“Kukho umdla okhulayo wokusebenzisa ikharbon dioksayiksayikriya ukuvelisa iimveliso ezixabisekileyo ezinokunceda ekunciphiseni iziphumo zotshintsho lwemozulu ngelixa zivelisa iingenelo kwezoqoqosho.
UNjingalwazi uYoon uthe: “Ngokudibanisa ii-hydrogenation reactions ze-carbon dioxide kunye nee-cation exchange reactions, kuye kwaphuhliswa inkqubo yokucoca ii-metal oxides ngaxeshanye nokuvelisa i-formate exabisekileyo.”
Abaphandi bavavanye ukuba indlela yabo ingathatha indawo yeendlela zemveliso zangoku na. Ukuze benze oku, bafunde ngempembelelo yokusingqongileyo kunye nokuphila kakuhle kwezoqoqosho kweendlela zokuguqula i-CO2 ezizinzileyo.
“Ngokusekelwe kwiziphumo, singatsho ukuba indlela yethu yindlela enobuhlobo nokusingqongileyo endaweni yokuguqula i-carbon dioxide enokuthatha indawo yeendlela zemveli kwaye incede ekunciphiseni ukukhutshwa kwe-carbon dioxide kwimizi-mveliso,” ucacise watsho uNjingalwazi uYin.
Nangona amathuba okuguqula ikharbon diokside ibe ziimveliso ngendlela ezinzileyo ethembisayo, ezi nkqubo azisoloko zilula ukuzikhulisa.
Uninzi lwetekhnoloji ze-CCU azikathengiswa kuba ukusebenza kwazo kwezoqoqosho kuphantsi xa kuthelekiswa neenkqubo zorhwebo zemveli.
“Kufuneka sidibanise inkqubo ye-CCU kunye nokurisayikilisha inkunkuma ukuze ikwazi ukusebenza kakuhle kokusingqongileyo nangokwezoqoqosho. Oku kunokunceda ekufezekiseni iinjongo zokukhupha ukungcola okungafunekiyo kwixesha elizayo,” uGqr. Lee uqukumbele ngelitshoyo.
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