Biogas is a renewable fuel that can be used to power stationary engines that generate electricity and in some instances, co-generate heat. Sources of biogas include landfills, dairy and poultry farms, and wastewater treatment plants. Biogas consists primarily of methane and carbon dioxide and typically contains contaminants such as hydrogen sulfide and siloxanes. These contaminants can be detrimental to both the engine and the emission control catalyst and must be reduced to very low levels in upstream gas cleaning systems before the gas is burned in the engine. Johnson Matthey supplies advanced SCR systems equipped with oxidation catalyst to reduce NOx, CO, VOC and formaldehyde (CH2O) emissions and prevent air pollution from stationary engines at many different biogas sources. Some of these installations are described below:
Johnson Matthey catalytic emission control solutions make clean energy from biogas possible.
Landfill Gas to Pipeline Quality Gas
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- Plant converting landfill gas to pipeline gas is powered by eighteen Series 60-350 kW Detroit Diesel bi-fuel engines
- One advanced SCR system treats the exhaust of six engines
- Fueled by real-time blended landfill gas and diesel
- Advanced SCR system installed 2008
Wastewater Treatment
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- Waste water treatment plant is powered by eight Cooper-Bessemer 3500/4000 HP biogas engines
- Fueled by real-time blended digester gas and natural gas
- First advanced SCR system installed in 2009 demonstrated compliance with Rule 1110.2
- Seven additional advanced SCR systems installed 2015
Dairy Digester Gas to Energy
- Two Caterpillar 1,000 kW biogas engines provide 13,000 MWh per year to the electrical grid
- Fueled by 100% dairy digester gas
- Advanced SCR systems installed 2013
Our expert
Robert Bono (US)