Glossary of Terms


Absorption is the process by which a fluid is dissolved by a liquid or solid.


Adsorption is the process by which atoms, ions or molecules form a substance and adhere (in gas, liquid or absorbed solid state) to each other.

A4A - Airlines for America

Airlines for America (A4A) advocates on behalf of its members to shape crucial policies and measures that promote safety, security and a healthy U.S. airline industry. We work collaboratively with airlines, labor, Congress and the Administration to improve air travel for everyone.

Alternative Fuels

A fuel other than gasoline used to ignite a spark engine (vehicles, trucks, etc.). Here is a link to the Alternative Fuels Data Center.

Alternative Jet Fuels

Alternative Jet Fuels: Sustainable alternatives to the traditional petroleum based jet fuel. “Drop in” jet fuel is created from sustainable sources and mimics the chemistry of petroleum jet fuel, with the same level of safety and performance.


American Society for Testing Methods


Commercial Aviation Alternative Fuels Initiative


European Committee for Standardization


Cracking: in the world of petrochemistry and organic chemistry, cracking is the process by which complex organic molecules, such as kerogens or long chain hydrocarbons, are broken down into simpler molecules. The process of breaking down these hydrocarbons is done with high pressure and/or temperature.


Subset of ASTM that oversees the standardization and testing methods for liquid petroleum products


Standard test method for hydrocarbon types in liquid petroleum products.

``Drop in`` Jet Fuel Blend

An alternative to traditional petroleum based jet fuel that provides the same level of performance but is made from sustainable resources.


FIA: Is the method for commonly determining the saturated, olefinic, and aromatic component types in lighter petroleum distillates.


Ethanol: Ethanol is a volatile, flammable and colorless liquid with a slight odor. The chemical compound is C2H5OH. It is produced by the fermentation of sugar or yeast OR the petrochemical process. It is most commonly used as a clean burning fuel source.


Environmental Protection Agency


Federal Aviation Administration


Fatty Acid Methyl Esters


Feedstock: Any bulk raw material constituting the principal input for an industrial process. For example “Bio materials may be substituted for petrochemical feedstocks as petroleum prices rise.”

FIA - Fluorescent Indicator Adsorption

Vacuum Ultraviolet: a range of light on the ultraviolet spectrum between 120 – 450 nanometers that is not visible with the naked eye.

IATA - International Air Transport Association

IATA: Represent, lead and serve the airline industry globally.

Octane (rating/number)

Octane (rating/number): is a standard measure of the performance of an engine or aviation fuel. The higher the octane number, the more compression the fuel can withstand before igniting. Higher octane numbers mean higher engine performance. Lower octane numbers, with higher cetane numbers are better for diesel engines because diesel engines do not compress the fuel.


PAC LP: The current manufacturer of the Reformulyzer, which is used in ASTM D6839.


Supercritical Fluid Chromatography

VUV - Vacuum Ultraviolet

Vacuum Ultraviolet: a range of light on the ultraviolet spectrum between 120 – 450 nanometers that is not visible with the naked eye.