Sothern California Gas (SoCalGas), Pacific Gas and Electric Company (PG&E) and Opus 12 have joined forces to advance an electrochemical technology that converts the carbon dioxide (CO2) content in raw biogas to pipeline-quality renewable natural gas.
The single-step process is designed to use renewable electricity, and thus also provides a way for long-term storage of excess wind and solar power. The twelve-month R&D effort was funded by SoCalGas and PG&E.
Raw biogas is produced from the anaerobic breakdown of waste from sources like landfills, sewage, and dairy farms. It contains roughly 60% methane, and 40% CO2.
While current biogas upgrading technology removes the CO2 from biogas, the new technology captures the CO2 and converts it into additional renewable fuel.
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