Hydrocarbons

Hydrocarbons are a class of molecules comprised of carbon and hydrogen. They can range in size from one carbon atom with four hydrogen atoms (methane) to long chains and rings.

Significance for a Martian colony

The manufacturing of hydrocarbons is inevitable for a colony on Mars. As an intermediate product they are a resource to manufacture a great variety of vital products that are made from synthetic materials, such as space suits, gaskets, etc.

Liquid hydrocarbons can be used for energy storage. Accumulated in large tanks, they can be oxidized on demand.

Hydrocarbon Molecules

Alkanes

Alkanes are non-cyclical hydrocarbons containing only single bonds between carbon and hydrogen atoms.

Methane CH₄
Ethane C₂H₆
Propane C₃H₈
Butane & Isobutane C₄H₁₀
Pentane, Isopentane, & Neopentane C₅H₁₂

Cycloalkanes

Cycloalkanes are cyclical hydrocarbons containing only single bonds between carbon and hydrogen atoms.

Cyclopropane C₃H₆

Alkenes

Alkenes are hydrocarbons containing at least one double carbon bond.

Ethylene C₂H₄

Alkynes

Alkynes, also called acetylenes, are hydrocarbons containing at least one triple carbon bond.

Ethyne ( $C_{2}H_{2}$ ) is the simplest possible alkyne.

Alcohols

Alcohols are hydrocarbons containing a hydroxyl functional group (OH). They are liquid and, therefore, can be stored easily without high pressure or low temperature. Alcohols can be used as fuel, producing heat when oxidized, with water and carbon dioxide as reaction products.