Inqubekelaphambili nokuhlaziywa komnotho kokukhiqizwa kwe-hydrogen nge-electrolysis yama-oxide aqinile

Inqubekelaphambili nokuhlaziywa komnotho kokukhiqizwa kwe-hydrogen nge-electrolysis yama-oxide aqinile

I-Solid oxide electrolyzer (SOE) isebenzisa umhwamuko wamanzi wezinga lokushisa eliphezulu (600 ~ 900°C) ukwenza i-electrolysis, esebenza kahle kakhulu kune-alkaline electrolyzer ne-PEM electrolyzer. Ngawo-1960, i-United States neJalimane yaqala ukwenza ucwaningo nge-high-temperature water vapor SOE. Umgomo wokusebenza we-SOE electrolyzer uboniswa kuMfanekiso 4. I-hydrogen egaywe kabusha nomhwamuko wamanzi kungena ohlelweni lokusabela usuka ku-anode. Umhwamuko wamanzi ufakwa ngogesi ube yi-hydrogen ku-cathode. I-O2 ekhiqizwa yi-cathode ihamba nge-electrolyte eqinile iye ku-anode, lapho iphinde ihlangane khona ukuze yenze umoya-mpilo futhi ikhulule ama-electron.

Ngokungafani ne-alkaline kanye ne-proton exchange membrane electrolytic cell, i-electrode ye-SOE isabela ngokuthinta umhwamuko wamanzi futhi ibhekana nenselele yokukhulisa indawo yokuhlangana phakathi kwe-electrode nokuthintana komhwamuko wamanzi. Ngakho-ke, i-SOE electrode ngokuvamile inesakhiwo esinezimbotshana. Inhloso ye-electrolysis yomhwamuko wamanzi ukunciphisa umfutho wamandla nokunciphisa izindleko zokusebenza ze-electrolysis yamanzi ewuketshezi evamile. Eqinisweni, nakuba ingqikithi yamandla edingekayo ekuphenduleni kokubola kwamanzi inyuka kancane ngokukhuphuka kwezinga lokushisa, imfuneko yamandla kagesi iyancipha kakhulu. Njengoba izinga lokushisa le-electrolytic likhuphuka, ingxenye yamandla adingekayo inikezwa njengokushisa. I-SOE iyakwazi ukukhiqiza i-hydrogen lapho kukhona umthombo wokushisa osezingeni eliphezulu. Njengoba izinga lokushisa eliphezulu legesi elipholile amandla enuzi lingashiselwa ku-950°C, amandla enuzi angasetshenziswa njengomthombo wamandla we-SOE. Ngesikhathi esifanayo, ucwaningo lubonisa ukuthi amandla avuselelekayo njengamandla e-geothermal nawo anamandla njengomthombo wokushisa we-steam electrolysis. Ukusebenza kumazinga okushisa aphezulu kunganciphisa amandla kagesi ebhethri futhi kukhuphule izinga lokusabela, kodwa kuphinde kubhekane nenselelo yokuqina kwe-thermal nokuvala uphawu. Ngaphezu kwalokho, igesi ekhiqizwa yi-cathode iyingxube ye-hydrogen, okudingeka ihlukaniswe futhi ihlanzwe, ikhulise izindleko uma iqhathaniswa ne-electrolysis yamanzi evamile. Ukusetshenziswa kwe-proton-conducting ceramics, njenge-strontium zirconate, kunciphisa izindleko ze-SOE. I-Strontium zirconate ibonisa ukusebenza kahle kwe-proton cishe ku-700°C, futhi ihambisana ne-cathode ukukhiqiza i-hydrogen ehlanzekile, okwenza kube lula umshini we-steam electrolysis.

Yan et al. [6] ibike ukuthi ishubhu le-zirconia ceramic eliqiniswe yi-calcium oxide lalisetshenziswa njenge-SOE yesakhiwo esisekelayo, indawo yangaphandle yayimbozwe nge-lanthanum perovskite encane (engaphansi kuka-0.25mm) njenge-anode, kanye ne-Ni/Y2O3 eqinile ye-calcium oxide cermet njenge-cathode. Ku-1000°C, 0.4A/cm2 kanye namandla okufaka angu-39.3W, amandla okukhiqiza i-hydrogen weyunithi ngu-17.6NL/h. Okubi kwe-SOE ukugcwala ngokweqile okubangelwa ukulahlekelwa okuphezulu kwe-ohm okuvamile ekuxhumekeni phakathi kwamaseli, kanye nokugcwala okukhulu kokugcwala ngokweqile ngenxa yemikhawulo yokuthuthwa kokusabalalisa umhwamuko. Eminyakeni yamuva, amangqamuzana e-electrolytic planar adonse ukunaka okukhulu [7-8]. Ngokuphambene namaseli e-tubular, amaseli ayisicaba enza ukukhiqiza kuhlanganiswe kakhudlwana futhi kuthuthukise ukusebenza kahle kokukhiqizwa kwe-hydrogen [6]. Njengamanje, isithiyo esiyinhloko ekusetshenzisweni kwezimboni ze-SOE ukuzinza kwesikhathi eside kweseli ye-electrolytic [8], futhi izinkinga zokuguga kwe-electrode nokuvala kungase kubangelwe.