Kupita patsogolo ndi kusanthula kwachuma kwa kupanga haidrojeni ndi electrolysis ya oxidis olimba

Kupita patsogolo ndi kusanthula kwachuma kwa kupanga haidrojeni ndi electrolysis ya oxidis olimba

Solid oxide electrolyzer (SOE) imagwiritsa ntchito mpweya wamadzi wotentha kwambiri (600 ~ 900 ° C) pa electrolysis, yomwe imakhala yogwira mtima kwambiri kuposa alkaline electrolyzer ndi PEM electrolyzer. M’zaka za m’ma 1960, dziko la United States ndi Germany linayamba kuchita kafukufuku wokhudza nthunzi yamadzi yotentha kwambiri yotchedwa SOE. Mfundo yogwirira ntchito ya SOE electrolyzer ikuwonetsedwa mu Chithunzi 4. Zobwezerezedwanso haidrojeni ndi nthunzi wamadzi zimalowa muzochita kuchokera ku anode. Mpweya wamadzi umapangidwa ndi electrolyzed kukhala haidrojeni pa cathode. O2 yopangidwa ndi cathode imadutsa mu electrolyte yolimba kupita ku anode, komwe imaphatikizananso kupanga mpweya ndikutulutsa ma elekitironi.

Mosiyana ndi alkaline ndi proton exchange membrane electrolytic cell, electrode ya SOE imachita ndi kukhudzana ndi nthunzi yamadzi ndipo imayang'anizana ndi vuto lakukulitsa malo olumikizirana pakati pa elekitirodi ndi kukhudzana ndi nthunzi wamadzi. Chifukwa chake, electrode ya SOE nthawi zambiri imakhala ndi porous. Cholinga cha electrolysis mpweya nthunzi ndi kuchepetsa mphamvu kwambiri ndi kuchepetsa ntchito mtengo wa ochiritsira madzi madzi electrolysis. M'malo mwake, ngakhale kuti mphamvu zonse zomwe zimafunikira pakuwola kwamadzi zimawonjezeka pang'ono ndi kutentha, mphamvu zamagetsi zimachepa kwambiri. Pamene kutentha kwa electrolytic kumawonjezeka, gawo la mphamvu zofunikira limaperekedwa ngati kutentha. SOE imatha kupanga haidrojeni pamaso pa gwero la kutentha kwambiri. Popeza kuti zida zanyukiliya zoziziritsidwa ndi gasi zimatha kutenthedwa mpaka 950 ° C, mphamvu ya nyukiliya imatha kugwiritsidwa ntchito ngati gwero lamphamvu la SOE. Nthawi yomweyo, kafukufukuyu akuwonetsa kuti mphamvu zongowonjezedwanso monga mphamvu ya geothermal imakhalanso ndi kuthekera ngati gwero la kutentha kwa nthunzi electrolysis. Kugwira ntchito pa kutentha kwakukulu kumatha kuchepetsa mphamvu ya batri ndikuwonjezera momwe amachitira, koma kumakumananso ndi vuto la kukhazikika kwamafuta ndi kusindikiza. Komanso, mpweya opangidwa ndi cathode ndi osakaniza haidrojeni, amene ayenera zina analekanitsidwa ndi kuyeretsedwa, kuwonjezera mtengo poyerekeza ochiritsira madzi madzi electrolysis. Kugwiritsiridwa ntchito kwa zitsulo zopangira proton, monga strontium zirconate, kumachepetsa mtengo wa SOE. Strontium zirconate imasonyeza bwino kwambiri pulotoni madutsidwe pafupifupi 700 ° C, ndipo amathandiza kuti cathode kupanga mkulu woyera haidrojeni, kufewetsa nthunzi electrolysis chipangizo.

Yan et al. [6] inanena kuti zirconia ceramic chubu yokhazikika ndi calcium oxide idagwiritsidwa ntchito ngati SOE yothandizira dongosolo, kunja kwake kunali yokutidwa ndi woonda (zosakwana 0.25mm) porous lanthanum perovskite monga anode, ndi Ni / Y2O3 khola la calcium oxide cermet monga cathode. Pa 1000 ° C, 0.4A/cm2 ndi 39.3W mphamvu yolowera, mphamvu yopanga haidrojeni ya unit ndi 17.6NL/h. Kuipa kwa SOE ndi kuchulukitsitsa komwe kumabwera chifukwa cha kutayika kwakukulu kwa ohm komwe kumakhala kofala pamalumikizidwe apakati pa ma cell, komanso kuchuluka kwamphamvu kwamagetsi chifukwa cha kuchepa kwa kayendedwe ka mpweya. M'zaka zaposachedwa, ma cell electrolytic planar akopa chidwi kwambiri [7-8]. Mosiyana ndi ma cell a tubular, ma cell athyathyathya amapangitsa kupanga kukhala kocheperako ndikuwongolera kupanga bwino kwa haidrojeni [6]. Pakalipano, chopinga chachikulu pakugwiritsa ntchito mafakitale a SOE ndi kukhazikika kwa nthawi yaitali kwa selo ya electrolytic [8], ndipo mavuto a ukalamba wa electrode ndi kutsekedwa kungayambitsidwe.