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~ Fuel Cell Sebagai Sel Bahan Bakar

Alpen Steel | Renewable Energy


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~ Fuel Cell Sebagai Sel Bahan Bakar

Wiki: Sel bahan bakar

Sel bahan bakar (bahasa Inggris: fuel cell) adalah sebuah alat elektrokimia yang mirip dengan baterai, tetapi berbeda karena dia dirancang untuk dapat diisi terus reaktannya yang terkonsumsi; yaitu dia memproduksi listrik dari penyediaan bahan bakar hidrogen dan oksigen dari luar. Hal ini berbeda dengan energi internal dari baterai. Sebagai tambahan, elektroda dalam baterai beraksi dan berganti pada saat baterai diisi atau dibuang energinya, sedangkan elektroda sel bahan bakar adalah katalitik dan relatif stabil.

Reaktan yang biasanya digunakan dalam sebuah sel bahan bakar adalah hidrogen di sisi anode dan oksigen di sisi kathoda (sebuah sel hidrogen). Biasanya, aliran reaktan mengalir masuk dan produk dari reaktan mengalir keluar. Sehingga operasi jangka panjang dapat terus menerus dilakukan selam aliran tersebut dapat dijaga kelangsungannya.

Sel bahan bakar seringkali dianggap sangat menarik dalam aplikasi modern karena efisiensi tinggi dan penggunaan bebas-emisi, berlawanan dengan bahan bakar umum seperti methane atau gas alam yang menghasilkan karbon dioksida. Satu-satunya hasil produk dari bahan bakar yang beroperasi menggunakan hidrogen murni adalah uap air. Namun ada kekhawatiran dalam proses pembuatan hidrogen yang menggunakan banyak energi. Memproduksi hidrogen membutuhkan "carrier" hidrogen (Biasanya bahan bakar fosil, meskipun air dapat dijadikan alternatif), dan juga listrik, yang diproduksi oleh bahan bakar konvensional. Meskipun sumber energi alternatif seperti energi angin dan surya dapat juga digunakan, namun sekarang ini mereka sangat mahal.


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