Definitions

synthesis-gas

Gas-to-liquids

This technology deals with the conversion of natural gas to hydrocarbon liquids such as gasoline or diesel fuel. One method starts with partial oxidation of methane (a component in natural gas) to carbon dioxide, carbon monoxide, hydrogen and water, the carbon monoxide to hydrogen (H2) ratio is adjusted using the water gas shift reaction) and the excess carbon dioxide removal by aqueous solutions of alkanolamine (or physical solvents) the water is removed yielding synthesis gas (syngas) that is chemically reacted over an iron or cobalt catalyst to produce liquid hydrocarbons and other byproducts. See Fischer-Tropsch. An alternative path starts by conversion of the natural gas to syngas, conversion of the syngas to methanol which is subsequently polymerized into alkanes over a zeolite catalyst.

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