Kodi graphite imagwiritsidwa ntchito bwanji mu ukadaulo wa maselo amafuta?

Mu machitidwe amphamvu amagetsi omwe akusintha nthawi zonse,graphite feltImadziwika bwino ngati chinthu chopangidwa ndi kaboni, chokhala ndi mawonekedwe apadera, magetsi, komanso mankhwala. Ngakhale kuti si zomangamanga zonse za maselo amafuta zomwe zimagwiritsa ntchito graphite felt padziko lonse lapansi, ntchito yake—makamaka m'maselo apamwamba amafuta ndi maselo amafuta osakanizidwa—yakhala ikukopa chidwi cha mainjiniya ndi opanga makina odzipereka kukonza magwiridwe antchito a maselo amafuta pazinthu zonse komanso pamlingo wa njira.

I. Makhalidwe oyambira a Graphite felt

Kuchokera ku sayansi ya zinthu, graphite felt ndi netiweki yokhala ndi ma porous atatu-dimensional yopangidwa ndi ulusi wa kaboni wolumikizidwa, womwe nthawi zambiri umachokera ku polyacrylonitrile (PAN) kapena pitch precursors ndipo umapangidwa ndi graphit pa kutentha kwambiri. Kapangidwe kameneka kamapereka graphite felt yokhala ndi zinthu zosiyanasiyana zofunika kwambiri m'malo opangira magetsi:

● Mphamvu yamagetsi yapamwamba: kuonetsetsa kuti ma elekitironi akuyenda bwino

● Kuchuluka kwa ma porosity (>90%): kumathandiza kuti mpweya kapena madzi alowe m'madzi

● Kukana dzimbiri mwamphamvu: kusinthasintha ku malo okhala ndi asidi/oxidation (monga PEMFCs)

● Kulimba mtima kwabwino pa kupsinjika: kumathandiza kuti munthu akhale wolimba mtima

● Kukana kutentha kwambiri: koyenera makina amagetsi otentha kwambiri

II. Ntchito ya Graphite Felt mu Maselo Osiyanasiyana a Mafuta

Kugwiritsa ntchito graphite mu ukadaulo wa maselo amafuta kumasiyana kwambiri kutengera kapangidwe ka makina.

1. Mu Mabatire Oyenda (monga mabatire a vanadium redox flow) - Zinthu Zazikulu za Electrode

Mu machitidwe amagetsi amagetsi a gawo lamadzimadzi - makamaka mabatire oyenda, omwe nthawi zambiri amakambidwa pamodzi ndi ukadaulo wa maselo amafuta chifukwa cha mfundo zawo zofanana zamagetsi - graphite felt imagwiritsidwa ntchito ngati chinthu chachikulu cha electrode. Malo ake apamwamba komanso kapangidwe kake kolumikizana kamakhala ndi ma porous amapereka malo ambiri ogwirira ntchito kuti achite redox pomwe akulimbikitsa kuyenda kwa electrolyte. Njira zosinthira pamwamba monga kuyatsa kutentha kapena okosijeni nthawi zambiri zimagwiritsidwa ntchito kuti ziwonjezere kunyowa kwake ndi ntchito yake yothandiza, zomwe zimakhudza mwachindunji magwiridwe antchito a dongosolo komanso kukhazikika kwa kayendedwe kake.

2. Mu Ma cell a Mafuta a PEM (Ma cell a Mafuta a Proton Exchange Membrane) - Kufalikira/Zinthu Zothandizira Zothandizira

Mosiyana ndi zimenezi, mu makina a proton exchange membrane (PEM), graphite felt si njira yachizolowezi yogwiritsira ntchito gas diffusion layer (GDL). Pepala la kaboni kapena nsalu ya kaboni imatchuka chifukwa cha kulinganiza bwino kwa conductivity, kuuma kwa makina, komanso kupanga. Komabe, graphite felt yapeza ntchito zapadera m'makonzedwe ena apadera a PEM, makamaka pamene pakufunika kasamalidwe kabwino ka madzi kapena kugawa mpweya. Kuchuluka kwa porosity yake kumatha kusintha magwiridwe antchito otumizira unyinji pansi pa chinyezi chambiri kapena mikhalidwe yomwe imakonda chinyezi, koma izi zimayambitsa kusiyana pakukana kukhudzana ndi kukhazikika kwa compressive, zomwe ziyenera kuthetsedwa mwa kuyang'anira bwino stack ndi pressure control.

3. Mu Ma Cell Amafuta Otentha Kwambiri (ma SOFC, ndi zina zotero) - Chothandizira Chothandizira/Chotsekera

Mu makina otentha kwambiri (monga ma electrolyzers olimba), graphite felt nthawi zambiri siigwiritsidwa ntchito ngati gawo lalikulu la electrochemical chifukwa cha kuchuluka kwa zinthu zadothi mu ma electrode ndi electrolyte. Komabe, imatha kugwira ntchito zothandizira, kuphatikizapo conductive buffering, sealing support, kapena kulola kutentha kukula mu zida zothandizira kapena madera olumikizirana. Ngakhale maudindo awa ndi achiwiri, ndi ofunikira kwambiri pakuwonetsetsa kuti nthawi yayitali komanso umphumphu wa makina zikuyenda bwino kwambiri.

III. Chidule cha Maudindo Ofunika Kwambiri mu Ukadaulo wa Mafoni a Mafuta

Kuchokera ku lingaliro la ukadaulo wa njira, kufunika kwa graphite felt kuli m'kuthekera kwake kuphatikiza ntchito zingapo mkati mwa chinthu chimodzi. Kapangidwe kake ka magawo atatu kamalola kupangidwa kwa ma electrochemical interfaces ochulukirapo, ndikuwonjezera bwino malo ogwirira ntchito popanda kuwonjezera kwambiri malo a dongosolo. Nthawi yomweyo, imathandizira kufalikira kwamadzimadzi kofanana, kuchepetsa kuchuluka kwa kuchuluka kwa madzi ndikuchepetsa kutayika kwa polarization komwe kumayenderana ndi malire otumizira katundu wambiri. Kuphatikiza koyenera kwa graphite felt kumathandiza kupangidwa kwa netiweki yopitilira yoyendetsera magetsi, potero kuchepetsa kukana kwamkati ndikukweza magwiridwe antchito onse a dongosolo.

Kuphatikiza apo, imagwira ntchito yofunika kwambiri pakukonza makina ndi kusonkhana. Kupindika kwachilengedwe komanso kulimba kwa graphite kumapangitsa kuti igwirizane ndi kulekerera kwa kupanga ndikusunga kukhudzana kokhazikika pakati pa zinthu. Khalidweli ndi lothandiza makamaka mumakina a modular kapena akuluakulu, chifukwa kugawa kofanana ndikofunikira kuti magwiridwe antchito akhale ogwirizana.

IV. N’chifukwa Chiyani Muyenera Kusankha Mphamvu ya Vet?

Mu gawo la maselo amafuta ndi ma electrochemical ena ofanana ndi kutentha kwambiri, VET Energy, pogwiritsa ntchito luso lake lopitiliza kufufuza ndi kupanga zinthu zopangidwa ndi kaboni, yapanga njira yonse yopangira zinthu zopangidwa ndi graphite felt ndi zinthu zophatikizika zomwe zimaphimba zochitika zosiyanasiyana zogwiritsira ntchito, kupereka mayankho okonzedwa bwino amitundu yosiyanasiyana ya maselo amafuta. Mayankho a zinthu za VET Energy agwiritsidwa ntchito kwambiri m'maukadaulo osiyanasiyana, kuphatikiza maselo amafuta a proton exchange membrane ndi maselo amafuta olimba a oxide, ndipo awonjezeredwa ndikutsimikiziridwa m'makina owonjezera monga mabatire oyenda. Ngati mukufufuza kuthekera kogwiritsa ntchito kwagraphite feltndi zinthu zokhudzana ndi kaboni m'makina amagetsi, kapena mukufuna kupititsa patsogolo njira zomwe zilipo komanso magwiridwe antchito, chonde musazengereze kulumikizana nafe kuti tikambirane ndikugwirizana kuti tilimbikitse chitukuko cha ukadaulo wamagetsi wa fuel cell wa m'badwo wotsatira.