{"id":109531,"date":"2021-02-22T11:32:33","date_gmt":"2021-02-22T06:02:33","guid":{"rendered":"https:\/\/www.vskills.in\/certification\/tutorial\/?page_id=109531"},"modified":"2024-04-12T14:30:39","modified_gmt":"2024-04-12T09:00:39","slug":"comparison-between-acidic-and-alkaline","status":"publish","type":"page","link":"https:\/\/www.vskills.in\/certification\/tutorial\/comparison-between-acidic-and-alkaline\/","title":{"rendered":"Comparison between Acidic and Alkaline"},"content":{"rendered":"\n

Six types of fuel cells have evolved in the past decades. They are called after their electrolyte, the substance that transports the ions. The electrolyte dictates the operating temperature of a fuel cell type. Depending on the operating temperature, a specific catalyst is chosen to oxidize the fuel. Fuel cell types therefore all have different catalysts. A brief summary of these six fuel cell types is given below.<\/p>\n\n\n\n

Fuel Cell Type<\/td>Common Electrolyte<\/td>Operating
Temperature<\/td>		System Output<\/td>Electrical Efficiency<\/td>Applications<\/td><\/tr><\/thead>
Polymer Electrolyte Membrane (PEM)<\/td>Solid organic polymer poly-perfluorosulfonic acid<\/td>50 – 100\u00b0C
122 – 212\u00b0F<\/td>		<1kW \u2013 250kW<\/td>60% (direct)
25-40% (reformed)<\/td>		Backup power
Portable power
Small distributed generation
Transportation<\/td><\/tr>
Direct Methanol   (DMFC)<\/td>Solid organic polymer poly-perfluorosulfonic acid<\/td>50 – 100\u00b0C
122 – 212\u00b0F<\/td>		Up to 1.5kW<\/td>20 – 25%<\/td>Consumer goods   Laptops Mobile phones<\/td><\/tr>
Alkaline (AFC)<\/td>Aqueous solution of potassium hydroxide soaked in a matrix<\/td>90 – 100\u00b0C
194 – 212\u00b0F<\/td>		10kW \u2013 100kW<\/td>60%<\/td>Military
Space<\/td><\/tr>
Phosphoric Acid (PAFC)<\/td>Liquid phosphoric acid soaked in a matrix<\/td>150 – 200\u00b0C
302 – 392\u00b0F<\/td>		50kW \u2013 1MW
(250kW module typical)<\/td>		32-38%<\/td>Distributed generation<\/td><\/tr>
Molten Carbonate (MCFC)<\/td>Liquid solution of lithium, sodium, and\/or potassium carbonates soaked in a matrix<\/td>600 – 700\u00b0C
1112 – 1292\u00b0F<\/td>		<1kW \u2013 1MW
(250kW module typical)<\/td>		45-47%<\/td>Electric utility
Large distributed generation<\/td><\/tr>
Solid Oxide (SOFC)<\/td>Solid zirconium oxide to which a small amount of Yttria is added<\/td>650 – 1000\u00b0C
1202 – 1832\u00b0F<\/td>		5kW \u2013 3MW<\/td>35-43%<\/td>Auxiliary power
Electric utility
Large distributed generation<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"

Six types of fuel cells have evolved in the past decades. They are called after their electrolyte, the substance that transports the ions. The electrolyte dictates the operating temperature of a fuel cell type. Depending on the operating temperature, a specific catalyst is chosen to oxidize the fuel. Fuel cell types therefore all have different…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-109531","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"\nComparison between Acidic and Alkaline - Tutorial<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.vskills.in\/certification\/tutorial\/comparison-between-acidic-and-alkaline\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Comparison between Acidic and Alkaline - Tutorial\" \/>\n<meta property=\"og:description\" content=\"Six types of fuel cells have evolved in the past decades. 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