advantages and disadvantages of phosphoric acid fuel cell

advantages and disadvantages of fuel cells Fuel cel ls have significant environmental advantages over traditional power generation technologies. [2] Phosphoric Acid Fuel Cell Technology. ... (AFC), phosphoric acid fuel cell (PAFC), molten carbonate fuel cell (MCFC), solid oxide fuel cell (SOFC), and proton exchange mem-brane fuel cell (PEMFC), etc. Academia.edu is a platform for academics to share research papers. A fuel cell is defined as an electrochemical device that continuously converts the chemical energy of fuel into electricity and heat without combustion.. Operating range is about 150 to 210 °C. Disadvantages include rather low power density and aggressive electrolyte. The problem with the capture/store approach is that it adds cost to the systems, making them less economical. 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. Phosphoric acid (H 3 PO 4) concentrated to 100% is used for the electrolyte in this fuel cell, which operates at 150–220 °C, since the ionic conductivity of phosphoric acid is low at low temperatures. There are seven primary types of fuel cell of commercial importance: Alkaline Fuel Cell (AFC), Proton Exchange Membrane Fuel Cell (PEMFC), Direct Methanol Fuel Cell (DMFC), Phosphoric Acid Fuel Cell (PAFC), Molten Carbonate Fuel Cell (MCFC), Solid Oxide Fuel Cell (SOFC) and Biofuel Cells. Electrolyte is highly concentrated or pure liquid phosphoric acid (H3PO4) saturated in a silicon carbide matrix (SiC). They were the first fuel cells to be commercialized. This is the reason that phosphoric acid fuel cells were the first fuel cells to become commercially viable and why they remain the most popular for remote installations and back-up power generation. 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. The relative stability of concentrated phosphoric acid is high compared with other common acids. 200 kW units are quite common and the major manufacturer, United Technologies Corp., Has installed over 75 MW of capacity. The advantages of a PEM fuel cell is that they have a high power density and are low in weight. Developed in the mid-1960s and field-tested since the 1970s, they have improved significantly in stability, performance, and cost. Advantages and Disadvantages of Fuel Cells. Difference between Fuel Cell and Battery A fuel cell is similar to other electrical cells (battery) in respect that both have the positive and negative electrodes with an electrolyte between them and both produce dc power. 5.1 Alkaline [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. fuelcell.co.uk - Successful fuel strategies for the future. They ... Phosphoric Acid Fuel Cells (PAFC) Phosphoric acid is the electrolyte used in an PAFC. The material reactions that take place are as follows: Usually the hydrogen for the reactions comes from reformed natural gas, and the oxygen comes from an air feed stream. PAFCs enjoyed three major benefits. They were the first fuel cells to be commercialized. Disadvantages include rather low power density and aggressive electrolyte. Such characteristics have made the PAFC a good candidate for early stationary applications. Like any other fuel cell, the phosphoric acid fuel cell (PAFC) uses oxygen and hydrogen to produce water, electricity, and heat. Main advantages of PAFC are: achievable heating and power generation and low sensitivity to fuel impurity [19]. A fuel cell is defined as an electrochemical device that continuously converts the chemical energy of fuel into electricity and heat without combustion.. PAFCs are moderately high temperature fuel cells, running at roughly 250-300° C. While their electricity generating efficiency ranges from 37 to 42%, their overall efficiency can reach 80% when they are combined for heat and power applications. It also has an extremely low vapor pressure even at an operating temperature of 200 °C (473 K). As the name suggests, PAFCs use phosphoric acid as the electrolyte. A fuel cell can convert more than 90% of the energy contained in a fuel into electrical energy and heat. 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. This is performed at moderately high temperatures, somewhere in between proton electrolyte membrane fuel cells and molten carbonate fuel cells. The properties, advantages, disadvantages and applications of six different kinds of fuel cells are introduced. Developed in the mid-1960s and field-tested since the 1970s, they have improved significantly in stability, performance, and cost. That means this technology is useful as an energy resource for mission-critical needs, emergency generators, and applications that require long-term storage because there is less energy loss that occurs with this technology. 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 … Simple construction, low electrolyte volatility, and long-term stability are additional advantages. PAFC have been used for stationary power generators with output in the 100 kW to 400 kW range and they are also finding application in large vehicles such as buses.[5]. [4] However, they are much less sensitive to CO than PEFCs and AFCs. And heat without combustion the carbon monoxide poisoning issue, it also makes these cells... Dispersed platinum catalyst than other types of fuel cell PAFC are: achievable heating and power ( CHP ).. Poisoning issue, it requires a very high temperature ( 150 ºC ~ 200 ºC to... 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