Sitesearch

Stakeholders

Navigation

Choose glossary language

 

molten carbonate fuel cells

Synonyms: MCFC

Wikipedia definition:

Molten-carbonate fuel cells (MCFCs) are high-temperature fuel cells, that operate at temperatures of 600 °C and above. Molten carbonate fuel cells (MCFCs) are currently being developed for natural gas, biogas (produced as a result of anaerobic digestion or biomass gasification), and coal-based power plants for electrical utility, industrial, and military applications. MCFCs are high-temperature fuel cells that use an electrolyte composed of a molten carbonate salt mixture suspended in a porous, chemically inert ceramic matrix of beta-alumina solid electrolyte (BASE). Since they operate at extremely high temperatures of 650 °C (roughly 1,200 °F) and above, non-precious metals can be used as catalysts at the anode and cathode, reducing costs. Improved efficiency is another reason MCFCs offer significant cost reductions over phosphoric acid fuel cells (PAFCs). Molten carbonate fuel cells can reach efficiencies approaching 60%, considerably higher than the 37–42% efficiencies of a phosphoric acid fuel cell plant. When the waste heat is captured and used, overall fuel efficiencies can be as high as 85%. Unlike alkaline, phosphoric acid, and polymer electrolyte membrane fuel cells, MCFCs don't require an external reformer to convert more energy-dense fuels to hydrogen. Due to the high temperatures at which MCFCs operate, these fuels are converted to hydrogen within the fuel cell itself by a process called internal reforming, which also reduces cost. Molten carbonate fuel cells are not prone to poisoning by carbon monoxide or carbon dioxide — they can even use carbon oxides as fuel — making them more attractive for fueling with gases made from coal. Because they are more resistant to impurities than other fuel cell types, scientists believe that they could even be capable of internal reforming of coal, assuming they can be made resistant to impurities such as sulfur and particulates that result from converting coal, a dirtier fossil fuel source than many others, into hydrogen. The primary disadvantage of current MCFC technology is durability. The high temperatures at which these cells operate and the corrosive electrolyte used accelerate component breakdown and corrosion, decreasing cell life. Scientists are currently exploring corrosion-resistant materials for components as well as fuel cell designs that increase cell life without decreasing performance.

Source: dbpedia

glossary info

How to Search Terms

Please enter a search term or choose a letter to navigate the glossary and to find definitions. This glossary aims to facilitate collaboration on the development of ambitious energy efficiency measures by clarifying definitions and highlighting common terminology. Definitions have been collected from trusted sources. It intended to expand this glossary in the future to include a wiki ensuring a truly collaborative process. If you contribute to this glossary please contact use at: info@reegle.info

Understanding Relations

The relation browser enables the user to see the relations between terms.

Below is an explanation of the letters that appear on the arrows in the relation browser

C = Has Concept Scheme. Points to a concept scheme in the reegle glossary. Concept schemes provide the main categories of the reegleglossary.
T = Has Top Concept. Points to a top concept in the reegleglossary. Top Concepts are the top level concepts in a concept scheme.
N = Has Narrower. Points to a narrower concept of the selected concept