Besides biofuels and LNG the below products are alternatives:

Methanol

Methanol is the simplest form of alcohol.

Most methanol is produced from natural gas, although it can be produced from biomass using very similar chemical processes or Power-to-X.

LPG

LPG is by definition any mixture of propane and butane in liquid form. 

Specific mixtures of butane and propane are used to achieve desired saturation, pressure, and temperature characteristics.

Hydrogen

Hydrogen is a colourless and non-toxic gas. 

It can be produced from various energy sources, such as by electrolysis of renewables, or by reforming natural gas.

Ammonia

Ammonia is a colourless gas at atmospheric temperature.

The deployment of renewable power is used to produce green ammonia, while grey ammonia is made from natural gas.