Ka holomua a me ka loiloi waiwai o ka hana hydrogen ma o ka electrolysis o nā oxides paʻa

Ka holomua a me ka loiloi waiwai o ka hana hydrogen ma o ka electrolysis o nā oxides paʻa

Hoʻohana ka electrolyzer oxide paʻa (SOE) i ka mahu wai wela kiʻekiʻe (600 ~ 900°C) no ka electrolysis, ʻoi aku ka maikaʻi ma mua o ka electrolyzer alkaline a me ka electrolyzer PEM. I nā makahiki 1960, ua hoʻomaka ʻo ʻAmelika Hui Pū ʻIa a me Kelemania e hana i ka noiʻi ʻana ma ka SOE mahu wai wela kiʻekiʻe. Hōʻike ʻia ke kumumanaʻo hana o ka electrolyzer SOE ma ke Kiʻi 4. Komo ka hydrogen hana hou a me ka mahu wai i loko o ka ʻōnaehana hana mai ka anode. Hoʻoheheʻe ʻia ka mahu wai i loko o ka hydrogen ma ka cathode. Neʻe ka O2 i hana ʻia e ka cathode ma o ka electrolyte paʻa i ka anode, kahi e hui hou ai e hana i ka oxygen a hoʻokuʻu i nā electrons.

ʻAʻole e like me nā cell electrolytic membrane alkaline a me proton exchange, pane ka electrode SOE me ka pilina mahu wai a ke kū nei i ka pilikia o ka hoʻonui ʻana i ka wahi interface ma waena o ka electrode a me ka pilina mahu wai. No laila, he ʻano porous ka electrode SOE ma ke ʻano laulā. ʻO ke kumu o ka electrolysis mahu wai, ʻo ia ka hoʻemi ʻana i ka ikaika o ka ikehu a me ka hoʻemi ʻana i ke kumukūʻai hana o ka electrolysis wai wai maʻamau. ʻO ka ʻoiaʻiʻo, ʻoiai ke piʻi iki nei ka nui o ka ikehu o ka hopena decomposition wai me ka hoʻonui ʻana i ka mahana, emi nui ka pono ikehu uila. I ka piʻi ʻana o ka mahana electrolytic, hāʻawi ʻia kekahi hapa o ka ikehu e pono ai ma ke ʻano he wela. Hiki i ka SOE ke hana i ka hydrogen i ke alo o kahi kumu wela wela kiʻekiʻe. ʻOiai hiki ke hoʻomehana ʻia nā reactors nuklea i hoʻomaʻalili ʻia e ke kinoea wela kiʻekiʻe i 950°C, hiki ke hoʻohana ʻia ka ikehu nuklea ma ke ʻano he kumu ikehu no ka SOE. I ka manawa like, hōʻike ka noiʻi he hiki nō hoʻi i ka ikehu hou e like me ka ikehu geothermal ke lilo i kumu wela o ka electrolysis mahu. Hiki i ka hana ʻana ma ke ana wela ke hoʻemi i ka voltage pila a hoʻonui i ka wikiwiki o ka hopena, akā ke kū nei hoʻi i ka pilikia o ka paʻa wela o ka mea a me ka sila ʻana. Eia kekahi, ʻo ke kinoea i hana ʻia e ka cathode he hui hydrogen, pono e hoʻokaʻawale hou ʻia a hoʻomaʻemaʻe ʻia, e hoʻonui ana i ke kumukūʻai i hoʻohālikelike ʻia me ka electrolysis wai wai maʻamau. ʻO ka hoʻohana ʻana i nā keramika alakaʻi proton, e like me ka strontium zirconate, e hōʻemi ana i ke kumukūʻai o SOE. Hōʻike ka Strontium zirconate i ka conductivity proton maikaʻi loa ma kahi o 700°C, a he mea kūpono ia i ka cathode e hana i ka hydrogen maʻemaʻe kiʻekiʻe, e hoʻomaʻalahi ana i ka hāmeʻa electrolysis mahu.

Ua hōʻike ʻo Yan et al. [6] ua hoʻohana ʻia ka paipu keramika zirconia i hoʻopaʻa ʻia e ka calcium oxide ma ke ʻano he SOE o ke ʻano kākoʻo, ua uhi ʻia ka ʻili o waho me ka lahilahi (ʻoi aku ka liʻiliʻi ma mua o 0.25mm) porous lanthanum perovskite ma ke ʻano he anode, a me ka Ni/Y2O3 stable calcium oxide cermet ma ke ʻano he cathode. Ma 1000°C, 0.4A/cm2 a me 39.3W mana hoʻokomo, ʻo ka hiki ke hana hydrogen o ka ʻāpana he 17.6NL/h. ʻO ka hemahema o SOE ʻo ia ka overvoltage i loaʻa mai nā pohō ohm kiʻekiʻe e maʻamau i nā pilina ma waena o nā cell, a me ka nui o ka overvoltage ma muli o nā palena o ka lawe ʻana i ka mahu. I nā makahiki i hala iho nei, ua huki nui nā cell electrolytic planar i ka nānā [7-8]. I ka hoʻohālikelike ʻana i nā cell tubular, hana nā cell pālahalaha i ka hana ʻana i ʻoi aku ka liʻiliʻi a hoʻomaikaʻi i ka pono o ka hana hydrogen [6]. I kēia manawa, ʻo ke keakea nui i ka noi ʻoihana o SOE ʻo ia ka paʻa lōʻihi o ka cell electrolytic [8], a hiki ke hana ʻia nā pilikia o ka ʻelemakule electrode a me ka deactivation.