Kufambira mberi uye ongororo yehupfumi hwekugadzirwa kwehydrogen kuburikidza neelectrolysis ye solid oxides

Kufambira mberi uye ongororo yehupfumi hwekugadzirwa kwehydrogen kuburikidza neelectrolysis ye solid oxides

Electrolyzer yeSolid oxide (SOE) inoshandisa utsi hwemvura hunodziya zvakanyanya (600 ~ 900°C) pakugadzira electrolysis, iyo inoshanda zvakanyanya kupfuura alkaline electrolyzer nePEM electrolyzer. Muma1960, United States neGermany vakatanga kuita tsvakiridzo pamusoro peutsi hwemvura hunodziya zvakanyanya SOE. Pfungwa yekushanda kweSOE electrolyzer inoratidzwa muMufananidzo 4. Hydrogen neutsi hwemvura zvinodzokororwa zvinopinda mu reaction system kubva kuanode. Utsi hwemvura hunoiswa electrolys kuita hydrogen pa cathode. O2 inogadzirwa ne cathode inofamba ne electrolyte yakasimba kuenda kuanode, uko inobatanazve kuti igadzire okisijeni uye ibudise maerekitironi.

Kusiyana nemasero emagetsi e-alkaline neproton exchange membrane, electrode yeSOE inosangana nekubatana kwemvura uye inotarisana nedambudziko rekuwedzera nzvimbo iri pakati peelectrode nekubatana kwemvura. Nokudaro, electrode yeSOE inowanzova nechimiro chine maburi. Chinangwa che electrolysis yemvura ndechekuderedza simba remagetsi uye kuderedza mutengo wekushanda kwe electrolysis yemvura yemvura yakajairika. Kutaura zvazviri, kunyange zvazvo simba rose rinodiwa pakuora kwemvura richikwira zvishoma nekupisa kuri kuwedzera, simba remagetsi rinoderera zvakanyanya. Sezvo tembiricha yemagetsi ichikwira, chikamu chesimba rinodiwa chinopihwa sekupisa. SOE inokwanisa kugadzira hydrogen pamberi pechinhu chinopisa zvakanyanya. Sezvo ma reactor enyukireya anotonhodzwa negasi achipisa zvakanyanya anogona kupiswa kusvika 950°C, simba renyukireya rinogona kushandiswa senzvimbo yesimba yeSOE. Panguva imwe chete, tsvakiridzo inoratidza kuti simba rinogona kudzorerwazve senge simba re geothermal rinewo mukana wekupisa kwe electrolysis ye steam. Kushanda pakupisa kwakanyanya kunogona kuderedza voltage yebhatiri uye kuwedzera reaction rate, asi inotarisanawo nedambudziko rekugadzikana kwekupisa kwezvinhu uye kuvhara. Pamusoro pezvo, gasi rinogadzirwa ne cathode musanganiswa we hydrogen, unofanirwa kupatsanurwa uye kucheneswa, zvichiwedzera mutengo kana tichienzanisa ne electrolysis yemvura yemvura yakajairika. Kushandiswa kwe proton-conducting ceramics, senge strontium zirconate, kunoderedza mutengo we SOE. Strontium zirconate inoratidza proton conductivity yakanaka pa700°C, uye inobatsira cathode kugadzira hydrogen yakachena kwazvo, zvichiita kuti mudziyo we electrolysis uve nyore.

Yan nevamwe vake [6] vakataura kuti zirconia ceramic tube yakagadzikiswa necalcium oxide yakashandiswa seSOE yechimiro chekutsigira, pamusoro pekunze paive pakaputirwa nelanthanum perovskite yakatetepa (isingasviki 0.25mm) ine porous lanthanum perovskite seanode, uye Ni/Y2O3 stable calcium oxide cermet se cathode. Pa 1000°C, 0.4A/cm2 uye 39.3W simba rekupinda, hydrogen production capacity yeyuniti i17.6NL/h. Dambudziko reSOE i overvoltage inokonzerwa nekurasikirwa kwe high ohm kunowanzoitika pakubatana pakati pemasero, uye high overvoltage concentration nekuda kwekuganhurirwa kwekufambisa kwevapor diffusion. Mumakore achangopfuura, planar electrolytic cells yakakwezva kutariswa kukuru [7-8]. Kusiyana ne tubular cells, flat cells dzinoita kuti kugadzirwa kuve kudiki uye kunovandudza kushanda kwehydrogen [6]. Parizvino, chipingamupinyi chikuru pakushandiswa kweSOE mumaindasitiri ndiko kugadzikana kwenguva refu kwesero remagetsi [8], uye matambudziko ekukwegura kwemagetsi uye kudzima mashandiro awo anogona kukonzerwa.