Inkqubela phambili kunye nohlalutyo lwezoqoqosho lwemveliso ye-hydrogen nge-electrolysis ye-solid oxides

Inkqubela phambili kunye nohlalutyo lwezoqoqosho lwemveliso ye-hydrogen nge-electrolysis ye-solid oxides

I-Solid oxide electrolyzer (SOE) isebenzisa umphunga wamanzi obushushu obuphezulu (600 ~ 900°C) kwi-electrolysis, esebenza ngcono kune-alkaline electrolyzer kunye ne-PEM electrolyzer. Kwiminyaka yoo-1960, i-United States kunye neJamani zaqala ukwenza uphando kwi-SOE yomphunga wamanzi obushushu obuphezulu. Umgaqo osebenzayo we-SOE electrolyzer uboniswe kuMfanekiso 4. I-hydrogen ephinda isetyenziswe kunye nomphunga wamanzi zingena kwinkqubo yokusabela ukusuka kwi-anode. Umphunga wamanzi ufakwa kwi-electrolyze kwi-cathode. I-O2 eveliswa yi-cathode ihamba nge-electrolyte eqinileyo ukuya kwi-anode, apho iphinda ihlangane khona ukuze yenze i-oxygen kwaye ikhuphe ii-electron.

Ngokungafaniyo neeseli ze-electrolytic ze-alkaline kunye ne-proton exchange membrane, i-electrode ye-SOE isabela ngokudibanisa umphunga wamanzi kwaye ijongene nomceli mngeni wokwandisa indawo yokudibana phakathi kwe-electrode kunye nokudibanisa umphunga wamanzi. Ke ngoko, i-electrode ye-SOE ngokubanzi inesakhiwo esinemibhobho. Injongo ye-electrolysis yomphunga wamanzi kukunciphisa amandla kunye nokunciphisa iindleko zokusebenza kwe-electrolysis yamanzi aqhelekileyo. Enyanisweni, nangona imfuneko yamandla iyonke yempendulo yokubola kwamanzi inyuka kancinci ngobushushu obukhulayo, imfuneko yamandla ombane iyancipha kakhulu. Njengoko ubushushu be-electrolytic busanda, inxalenye yamandla afunekayo inikezelwa njengobushushu. I-SOE inako ukuvelisa i-hydrogen xa kukho umthombo wobushushu obuphezulu. Ekubeni ii-reactor zenyukliya ezipholileyo ngegesi ephezulu zinokufudunyezwa ukuya kwi-950°C, amandla enyukliya angasetyenziswa njengomthombo wamandla kwi-SOE. Kwangaxeshanye, uphando lubonisa ukuba amandla avuselelekayo afana namandla e-geothermal nawo anamandla njengomthombo wobushushu we-electrolysis yomphunga. Ukusebenza kubushushu obuphezulu kunokunciphisa i-voltage yebhetri kwaye kwandise izinga lokuphendula, kodwa ikwajongene nomceli mngeni wokuzinza kobushushu bezinto kunye nokutywinwa. Ukongeza, igesi eveliswa yi-cathode ngumxube we-hydrogen, ekufuneka yahlulwe kwaye icocwe ngakumbi, nto leyo enyusa iindleko xa ithelekiswa ne-electrolysis yamanzi aqhelekileyo. Ukusetyenziswa kwee-ceramics eziqhuba i-proton, ezifana ne-strontium zirconate, kunciphisa iindleko ze-SOE. I-Strontium zirconate ibonisa ukuhanjiswa kwe-proton okugqwesileyo malunga ne-700°C, kwaye inceda i-cathode ukuvelisa i-hydrogen ecocekileyo kakhulu, nto leyo eyenza kube lula isixhobo se-electrolysis somphunga.

UYan et al. [6] baxele ukuba ityhubhu ye-ceramic ye-zirconia eqiniswe yi-calcium oxide yayisetyenziswa njenge-SOE yesakhiwo esixhasayo, umphezulu wangaphandle wawugqunywe yi-lanthanum perovskite ebhityileyo (engaphantsi kwe-0.25mm) enemingxuma njenge-anode, kunye ne-Ni/Y2O3 stable calcium oxide cermet njenge-cathode. Kwi-1000°C, amandla okufaka angama-0.4A/cm2 kunye nama-39.3W, amandla okuvelisa i-hydrogen yeyunithi yi-17.6NL/h. Ingxaki ye-SOE kukugqithisela okubangelwa kukulahleka okuphezulu kwe-ohm okuqhelekileyo kunxibelelwano phakathi kweeseli, kunye noxinzelelo oluphezulu lwe-overvoltage ngenxa yokunqongophala kokuhamba komphunga. Kwiminyaka yakutshanje, iiseli ze-electrolytic ze-planar zitsale ingqalelo enkulu [7-8]. Ngokungafaniyo neeseli zetyhubhu, iiseli ezisicaba zenza imveliso ibe ncinci ngakumbi kwaye ziphucula ukusebenza kakuhle kwemveliso ye-hydrogen [6]. Okwangoku, umqobo ophambili ekusetyenzisweni kwe-SOE kwimizi-mveliso kukuzinza kwexesha elide kweseli ye-electrolytic [8], kwaye iingxaki zokwaluphala kunye nokungasebenzi kwe-electrode zinokubangelwa.