Glossary

Biogas    
Methane from renewable sources, such as from a digester. It contains methane, carbon dioxide and steam.

Biomethane
Biogas cleaned (upgraded) from carbon dioxide and steam. It contains 97 per cent methane and can be compressed or liquefied.

CNG    
Abbreviation for Compressed Natural Gas. Methane that is compressed at pressures of 250-300 bars. In this guide the CNG abbreviation applies to both natural gas and biomethane for vehicle use.

Cryotank
A cryogenic “thermos” that stores liquefied methane (LNG or LBG) in refrigerated form.

LBE    
The Swedish Inflammable and Explosive Goods Act.

LNG/LBG    
Abbreviation for Liquefied Natural Gas and Liquefied Biomethane, respectively. 
Methane that is cooled to liquefied form (about -163 degrees Celsius). In this guide the LNG abbreviation applies to both natural gas and biomethane for vehicle use.

LPG
Abbreviation for Liquefied Petroleum Gas. LPG is a low pressure gas fuel used in some countries. Do not confuse it with CNG/LNG.

Methane     
The most basic hydrocarbon as well as a source of energy in biogas, biomethane and natural gas. 

Natural gas    
Methane of fossil origin.

TSA 2015    
Swedish regulations for methane filling stations. Instructions for designing and constructing filling stations to conform to safety requirements.

Upgrading    
The process that refines biogas from a digester into biomethane.