The RNG Coalition and the American Biogas Council have collaborated in recent months in order to bring clarity to those working in North America whose roles cross over into the biogas and RNG industries (and any biomass, waste to energy, or connected policy and regulatory position). We have drafted, vetted and come together to put forth the following agreed upon definitions.
  • Biogas: a mixture of carbon dioxide (CO2) and hydrocarbons, primarily methane (CH4) gas, from the biological decomposition of organic materials.
  • Syngas: a gas mixture composed primarily of hydrogen (H2) and carbon monoxide (CO) along with hydrocarbons from the thermochemical decomposition of organic or inorganic materials.
  • Conditioned Biogas: medium-BTU biogas that is stripped of some trace contaminants and water, but maintains the relative mix of carbon dioxide (CO2) and methane (CH4).
  • Biomethane: biogas-derived, high-BTU gas that is predominately methane after the biogas is upgraded to remove most of the contaminants and a majority of the carbon dioxide (CO2) and nitrogen (N2) found in biogas.
  • Renewable Natural Gas (RNG): biomethane that is upgraded to natural gas pipeline quality standards such that it may blend with, or substitute for, geologic natural gas.
  • Renewable Compressed Natural Gas (R-CNG): RNG that is compressed to a high pressure, often for use as a transportation fuel.
  • Renewable Liquefied Natural Gas (R-LNG): RNG that is converted to liquid form, often for use as a transportation fuel.