The Dallas Clean Energy McCommas Bluff Landfill located in the City of Dallas is the third largest production landfill in the USA.

Pyro Green-Gas Inc. provided the primary landfill gas desulfurization system using its first generation iron chelate process which reduces the hydrogen sulfide in the landfill gas to 50ppmv. Pyro Green-Gas also provided the desulfurized landfill gas upgrading system for phase two of the gas plant, which system has a capacity of 5.5 million SCFD and includes a non-methane organic compounds (NMOC) and siloxanes removal system, followed by a carbon dioxide (CO2) removal unit. The NMOC/Siloxanes removal process uses a continuously regenerative thermal swing adsorption (TSA) system, using purge gas from the CO2 separation system as regenerative gas.

The CO2 separation system uses a vacuum pressure swing adsorption (VPSA) process where the carbon dioxide is adsorbed under pressure into a molecular sieve (media), which media is then regenerated under vacuum.

The renewable natural gas (RNG) produced has consistently been of the required quality for injection into the pipeline network.

Project Data
Location: Dallas, Texas, USA
Start of Operation: 2013
Application: Production of RNG for pipeline injection
Biogas Feedstock: Landfill gas from MSW facility
About the Facility
Desulfurization plant capacity: 18,000 SCFM
Upgrading plant capacity: 5.5 million SCFD (3,819 SCFM)
Scroll to Top