Biogenic CO2: we give CO2 a second life
Biogenic CO2 refers to carbon dioxide (CO2) that is produced by living organisms, such as plants and animals. Carbon dioxide (CO2) is present within the ‘raw’ biogas. But because of its inert nature, it is not combustible and therefore not required in the biomethane and Bio LNG fuels that are produced from the methane in the biogas. We give CO2 a second life in a number of industries.
What is biogenic CO2?
When living things breathe, eat, and grow, they release CO2 as a byproduct of their metabolic processes. This CO2 is considered biogenic because it is derived from biological sources. In contrast, fossil fuel combustion, which is a major source of CO2 emissions, produces CO2 that is considered non-biogenic because it comes from the decomposition of ancient plants and animals that were buried and subjected to heat and pressure over millions of years. Biogenic CO2 is not typically considered to be a significant contributor to climate change because it is part of the natural carbon cycle and is typically offset by the uptake of CO2 by plants through photosynthesis.
How do we separate the CO2 from the biogas?
The CO2 in biogas is first separated from the methane using a membrane separation technology (similar to that of a reverse osmosis water treatment system) in a Biogas Upgrading Plant. The separated CO2 is then purified and liquified in a CO2 liquefaction plant after which it is stored on-site in pressurised storage tanks.
We transport the liquified Biogenic CO2 from the Green Create AD Plant using road tankers. Many industries including food and beverage, water treatment, electronics manufacturing, and in controlling chemical reactions use it.