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Membrane Electrode Assembly Modification by Zeolite and Graphene Oxide

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Membrane Electrode Assembly Modification by Zeolite and Graphene Oxide ( membrane-electrode-assembly-modification-by-zeolite-and-grap )

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Appendix B Appendix B: MEA LAYERS CALCULATION According to the lab standard procedure of preparing carbon ink for fabricating the gas diffusion layer (GDL), it was desired to achieve a target of 1.0 mg of Ketjen black per cm2 and 10 wt% of PTFE of the GDL weight. Therefore, the area of the carbon paper was (4.5 cm X 4.5 cm) 20.25cm2. Carbon ink: the following calculation was made to prepare four GDL’s (i.e. 2 MEA). For one GDL 𝑆hπ‘œπ‘’π‘™π‘‘ π‘π‘œπ‘£π‘’π‘Ÿπ‘  2 1.0π‘šπ‘” 𝐾𝑒𝑑𝑗𝑒𝑛 π‘π‘™π‘Žπ‘π‘˜ β†’ 1π‘π‘š 𝑆hπ‘œπ‘’π‘™π‘‘ π‘π‘œπ‘£π‘’π‘Ÿπ‘  2 hπ‘œπ‘€ π‘šπ‘Žπ‘›π‘¦(π‘₯π‘šπ‘”) π‘˜π‘’π‘‘h𝑒𝑛 π‘π‘™π‘Žπ‘π‘˜ β†’ 20.25π‘π‘š Therefore, π‘₯ = 1π‘šπ‘”Γ—20.25π‘π‘š2 = 20.25 π‘šπ‘” = 0.02025𝑔 π‘œπ‘“ 𝐾𝑒𝑑𝑗𝑒𝑛 π‘π‘™π‘Žπ‘π‘˜ 1π‘π‘š2 For four GDL’s 0.02025𝑔 Γ— 4(𝐺𝐷𝐿′𝑠) = 0.081𝑔 π‘œπ‘“ 𝐾𝑒𝑑𝑗𝑒𝑛 π‘π‘™π‘Žπ‘π‘˜ 0.081𝑔 Γ— 4(π‘€π‘Žπ‘ π‘‘π‘’ π‘“π‘Žπ‘π‘‘π‘œπ‘Ÿ) = 𝟎. πŸ‘πŸπŸ’π’ˆ 𝒐𝒇 𝑲𝒆𝒕𝒋𝒆𝒏 π’ƒπ’π’‚π’„π’Œ πΉπ‘œπ‘Ÿ 𝑑h𝑒 𝑃𝑇𝐹𝐸, 10% Γ— 0.324𝑔 = 0.0324𝑔 Γ— 2(π‘€π‘Žπ‘ π‘‘π‘’ π‘“π‘Žπ‘π‘‘π‘œπ‘Ÿ) β‰ˆ 𝟎. πŸŽπŸ”π’ˆ 𝒐𝒇 𝑷𝑻𝑭𝑬 The amount of catalyst required for 20.25cm2 (fuel cell active area) are shown below: πΆπ‘œπ‘›π‘‘π‘Žπ‘–π‘›π‘  1.0π‘šπ‘” π‘œπ‘“ π‘π‘Žπ‘‘π‘Žπ‘™π‘¦π‘ π‘‘ β†’ 0.4π‘šπ‘” π‘œπ‘“ 𝑃𝑑 π‘π‘œπ‘›π‘‘π‘Žπ‘–π‘›π‘  π‘₯π‘šπ‘” π‘œπ‘“ π‘π‘Žπ‘‘π‘™π‘¦π‘ π‘‘ β†’ 1.0π‘šπ‘” π‘œπ‘“ 𝑃𝑑 𝑇hπ‘’π‘Ÿπ‘’π‘“π‘œπ‘Ÿπ‘’, π‘₯ = 1.0π‘šπ‘”(π‘π‘Žπ‘‘) Γ— 1.0π‘šπ‘”(𝑃𝑑) = 2.5π‘šπ‘” π‘œπ‘“ π‘π‘Žπ‘‘π‘Žπ‘™π‘¦π‘ π‘‘ 0.4π‘šπ‘”(𝑝𝑑) For electrode area is 20.25cm2, 𝑠hπ‘œπ‘’π‘™π‘‘ π‘π‘œπ‘£π‘’π‘Ÿ 2 2.5π‘šπ‘” π‘œπ‘“ π‘π‘Žπ‘‘ β†’ 1.0π‘π‘š 𝑠hπ‘œπ‘’π‘™π‘‘ π‘π‘œπ‘£π‘’π‘Ÿ 2 hπ‘œπ‘€ π‘šπ‘Žπ‘›π‘¦(π‘₯π‘šπ‘”)π‘œπ‘“ π‘π‘Žπ‘‘ β†’ 20.25π‘π‘š 𝑑hπ‘’π‘Ÿπ‘’π‘“π‘œπ‘Ÿπ‘’, π‘₯ = 20.25π‘π‘š2 Γ— 2.5π‘šπ‘” = 50.625π‘šπ‘” = 0.050625𝑔 1.0π‘π‘š2 0.050625 π‘€π‘Žπ‘  𝑑h𝑒 π‘π‘Žπ‘‘π‘Žπ‘™π‘¦π‘ π‘‘ 𝑛𝑒𝑒𝑑𝑒𝑑 π‘“π‘œπ‘Ÿ π‘œπ‘›π‘’ π‘’π‘™π‘’π‘π‘‘π‘Ÿπ‘œπ‘‘π‘’ Sirhan AL-Batty Page 201

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