Glossary

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Biomethane

A naturally developed form of methane. Biomethane is produced through the anaerobic digestion of organic matter.

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Brazing

A process through which multiple metal items are connected by melting and applying a filler metal into a joint. Filler metals have a lower melting point than the metal it is being applied to. Brazing is different from soldering because you do not melt the metals that are being joined, only the filler metal. Hydrogen gas is frequently used to create an atmosphere for many metallurgical processes including brazing.

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Carbon Dioxide Compression

Carbon dioxide compression refers to the process and progression of pressurizing (compressing) Carbon dioxide (CO2) as a gas. Carbon dioxide has a very low reactivity as a gas, as a result, carbon dioxide has a broad range of applications as a compressed gas. Some applications include: propellant in fire extinguishers; carbonated soft drinks; flotation devices; paintball markers. Carbon dioxide is also used as a solvent.

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Carbon Molecular Sieves (CMS)

A molecular sieve is a material with small pores of uniform size. These pore diameters are small enough to allow small molecules to pass through, however large molecules cannot be absorbed. Many molecular sieves are used as desiccants (drying agents). Commonly used in the filtration of air or gas, a substance is passed through a cartridge filter which, dependent on the application, is filled with molecular sieves and/or activated carbon, in order to remove unwanted particulates.

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Carrier Gas

In gas chromatography, a carrier gas is used as the solvent through which the various components of a compound can be separated, analyzed, identified, and studied individually. Proton OnSite's hydrogen gas generators are frequently used in gas chromatography as a cheap and reliable alternative to helium and other inert gases that are increasing in cost.

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Catalytic Atmosphere

Catalytic atmospheres are developed when a catalyst is introduced to a solution of reactant substances under an inert atmosphere in a pressure vessel.

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Cell Stack

The primary electrochemical component in a fuel cell electrolysis system. Cell stacks convert chemical energy to electricity (and vice versa) through an electrochemical reaction involving an anode and a cathode. In a PEM cell stack, protons are conducted through the electrolyte membrane, and the electrons flows through an external circuit between the anode and cathode.

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Chemical Synthesis

The reaction through which two elements or compounds are reacted in order to combine the two elements or compounds. Often Chemical synthesis forms the desired product, and a byproduct, that can be recycled or disposed (depending on the byproduct). A synthesis reaction would be as follows: A + B → AB. The formation of water would be as follows: H2 + O2 → H2O;  synthesis is commonly seen in the formation of ammonia.

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Chlorofluorocarbons (CFC's)

Harmful chemicals released as a derivative of ethane and methane. Chlorofluorocarbons contain carbon, chlorine, and fluorine; they are often present in aerosol sprays, foams, solvents, and most commonly, refrigerants. 

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