SOFCs operate high temperature, so the materials used as components are thermally challenged [5]. [4] However, they are much less sensitive to CO than PEFCs and AFCs. High Efficiency- when utilizing co-generation, fuel cells can attain over 80% energy efficiency; Good reliability- quality of power provided does not degrade over time. In the end, eliminating hydrocarbon fuels entirely is the major goal. The Advantages of Fuel Cells. Advantages and Disadvantages of Fuel Cells. [2] As of 2011, PAFCs had accumulated more than 92,000 hours of operation on the space shuttle. A fuel cell is defined as an electrochemical device that continuously converts the chemical energy of fuel into electricity and heat without combustion.. Fuel cells create few traditional emissions, such as sulfur oxides, because they produce power without combustion, although some pollution is created in extracting the hydrogen from the feedstock. [3] At lower temperatures phosphoric acid is a poor ionic conductor, and CO poisoning of the platinum electro-catalyst in the anode becomes severe. Phosphoric acid fuel cells (PAFC) are a type of fuel cell that uses liquid phosphoric acid as an electrolyte.They were the first fuel cells to be commercialized [citation needed].Developed in the mid-1960s and field-tested since the 1970s, they have improved significantly in … Then the efficiency of each fuel cell is provided. The reaction process is similar to PEMFCs, with hydrogen being removed from the fuel via the assistance of a platinum catalyst. They were the first fuel cells to be commercialized. PAFCs are CO-tolerant and even can tolerate a CO concentration of about 1.5 percent, which broadens the choice of fuels they can use. At lower temperatures phosphoric acid is a poor ionic conductor, and CO poisoning of the platinum electro-catalyst in the anode becomes severe. Phosphoric acid fuel cell Last updated December 17, 2019 Scheme of a phosphoric acid fuel cell. The properties, advantages, disadvantages and applications of six different kinds of fuel cells are introduced. PAFCs were first produced in the 1960s for utilization on the space shuttle. It offers potentially higher energy densities than batteries and can be quickly recharged by refueling, whereas batteries must be thrown away or plugged in for a time‐consuming recharge. The PC25C Phosphoric Acid Fuel Cell The PC25C phosphoric acid fuel cell (ONSI Corp., 1995) was chosen for use in this case study Phosphoric acid fuel cells (PAFC) operate at temperatures around 150 to 200 C (about 300 to 400 degrees F). [8][9], http://energy.gov/eere/fuelcells/types-fuel-cells#phosphoric, "Indian-built Scorpene to carry critical DRDO system", "DRDO working on system to cut submarine vulnerability", National Pollutant Inventory - Phosphoric acid fact sheet, Photo Gallery of Fuel Cells Being Used Today, Cox Communications Installs Fuel Cells in California, Supermarket Benefits From 400kW Fuel Cell, Stationary Fuel Cells at Retail and Grocery Sites. Academia.edu is a platform for academics to share research papers. Such characteristics have made the PAFC a good candidate for early stationary applications.[1]. This potentially allows efficiency increases of up to 70%. While this solves the carbon monoxide poisoning issue, it also makes these fuel cells exceptionally expensive to produce. 1. fuel cells operate at different temperatures. The advantages and disadvantages of five types of fuel cells are reviewed and analyzed for a transportation application: alkaline, phosphoric acid, proton … One advantage of PAFC cells is that at 200 degrees C they tolerate a CO concentration of about 1.5 percent. The second major benefit is the scale of electricity production. Positively charged hydrogen ions migrate through the … The gases cannot be completely eliminated, but they can be captured and stored to prevent them from escaping into the atmosphere. 1.1.1 SOFC Advantages and Disadvantages The greenhouse gas emission created by utilizing fossil fuels has only been partly solved. Full-scale demonstration plants are currently being designed. [1] ADVANTAGES OF FUEL CELLS …show more content… This conversion takes place by the process of electrochemical combination of hydrogen with the oxygen from air. Disadvantages include rather low power density and aggressive electrolyte. 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