Blog Archives

Siloxanes from Household Products can be a Bane or a Boon for Landfill Gas Producers

Siloxanes are currently removed from landfill gas, but could be harnessed to bolster energy production.

  Synthetic man-made compounds that are used to manufacture common household products such as motor oil and shampoo are ending up on landfills where they supercharge natural gas produced by those landfills, a new study has found. While this currently poses a problem, it could present an opportunity to make landfill gas more energy-rich in […]

Environmental & Economic Impacts of Compressing RNG for use as CNG Vehicle Fuel

Compressing RNG in the form of compressed natural gas (CNG) for vehicle fuel

  Biogas can have impurities removed and upgraded to render it suitable for use as a vehicle fuel. This analysis examines the environmental and economic costs associated with cleaning, upgrading, and compressing RNG for use as compressed natural gas (CNG) used to power vehicles, using a Unisons Solutions biogas CNG (BioCNG) upgrading system and fueling […]

Upgrading Biogas for Pipeline Injection: What are the Environmental and Economic Costs?

Biogas upgrading allows for pipeline injection.

  Biogas can be cleaned to improve the quality, and once upgraded, it can be injected into a natural gas pipeline. In order for the raw biogas to meet quality standards required by pipeline operators contaminants such as sulfur, siloxane, and water vapor need to be removed. The methane component is then separated from the […]

Energy Conversion via a Biogas Fuel Cell: What are the environmental & economic costs?

How a biogas fuel cell operates

  A biogas fuel cell produces direct current electricity via an electrochemical process as opposed to combustion that drives a mechanical process that drives an electrical generator to produce power. This electrochemical process produces much lower criteria pollutant emissions, and even no emissions in some cases. Stationary biogas fuel cells are typically the high-temperature internal […]

Environmental & Economic Impacts of Combusting Biogas in Microturbine Engines

Combusting biogas in microturbine engines

  Microturbine engines are smaller versions of gas turbine engines ranging from 30 kilowatt to 333 kilowatt for individual engines to several megawatts when multiple engines are combined.  The efficiency of converting biogas to electricity ranges from around 22-27%. Nitrogen oxide emissions from microturbine engines powered by biogas fuel typically tend to be less than […]