Biogas

Not at all. Unlike propane or butane, biogas cannot be liquefied at normal temperatures. Biogas is primarily methane gas and carbon dioxide. As temperature decreases, carbon dioxide liquefies earlier than methane. Methane evaporates at a temperature - 161.5 ° C. Biogas is normally purified to methane and stored in cylinders, not liquefied but compressed under a pressure of 200-300 atmospheres. Methane can be liquefied as well but an additional costly cryogenic technique is required. 

It is possible, but such storage containers are expensive. Typically, low pressure gas tanks are designed for 1-4 hours of storage. There are spherical gas tanks of medium pressure for 2-5 days.

For long-term storage, biogas must be purified to methane and compressed at a high pressure of 200-300 atmospheres. In this case, storage should be underground which is similar to how natural gas is stored.

There is the Fischer-Tropsch technology for converting natural gas into liquid hydrocarbons such as gasoline and kerosene. However, such plants cost hundreds of millions of euros. Fuel does not have to be liquid to be used as an automobile fuel. Biogas purified to methane can be filled in gas tanks and used to power vehicles. Such purification, biogas-to-methane plants, are relatively inexpensive.