The technology exists for refineries to break up those molecules and add hydrogen, until the hydrogen-carbon ratio is suitable for making gasoline or diesel.

One promising way is to add hydrogen to the fuel/air mixture in a conventional gasoline engine.

The process uses hydrogenation to add hydrogen to molecules.

Hydrogenation is the process of adding hydrogen to organic compounds.

People making shortening add hydrogen to the alkene, turning it into an alkane.

Flow controllers are used to add hydrogen (for example, 10 Vol -% hydrogen in nitrogen).

Adding hydrogen to the biomass would reduce its carbon to produce fuel.

When reducing a carbon-carbon double bond, Raney nickel will add hydrogen in a syn fashion.

Trans fat is made by adding hydrogen to vegetable oil.

German and Canadian scientists have created a super-compressed material made from adding hydrogen to a compound with silicon.