Sepbember 10, 2007
System Produces Pipeline Quality Gas from Digester Gas
by Michael Mitariten, Guild Associates, Inc.
By utilizing the Guild PSA System, Intrepid Technologies is now able to produce a valuable natural gas product while benefiting the environment by reducing the production of greenhouse gases.
Intrepid Technologies, LLC., has been operating the first of two PSA Systems supplied by Guild
Associates for upgrading biogas at their Whitesides Digester Facility in Idaho. The operation, in the initial one-year time period, has shown the production of pipeline quality gas that meets or exceeds the required specifications.
"We are pleased that this system enabled us to bring the gas to pipeline purity and allow the delivery to an interstate pipeline," said Brad Frazee, Vice-President biomethane operations for Intrepid. “We look forward to future digesters and working with Guild on future projects”.
The system treats a water-saturated feed stream containing approximately 40% carbon dioxide
and approximately 3,000 ppm of H2S. In a single processing step, the system dehydrates the feed,
removes the H2S to less than 4 ppm, and reduces the carbon dioxide to less than 2% as required
by the pipeline.
Guild Associates has a long history of supplying adsorption based systems for removing contaminants
– including N2, CO2, H2O, H2S and heavy hydrocarbons - from contaminated gas streams . Over two dozen systems of various sizes have been installed to treat contaminated natural gas, coal mine
methane, landfill gases and other contaminated methane rich feed streams . Guild’s biogas process
involves compressing the gas from the digesters to 100 psig then passing it through its PSA system
where the water, H2S and CO2 are removed to deliver a pipeline quality product stream at near feed
pressure. The process requires no expensive consumables or reagents or ancillary H2S removal
equipment. The ability to remove all the contaminants present in the biogas in a single step insures low operating cost. The Guild system is designed to satisfy a range of digester plant sizes with feed rates from less than 500,000 cubic feet per day to over 20 million cubic feet per day.
Major features of the process are the ability to meet pipeline specifications regardless of the feed
composition, its high turndown capability, and adaptability to fluctuations in feed flow.
About Intrepid Technology and Resources, Inc.
(ITR) is an Idaho-based, publicly
traded (IESV:OB) company
specializing in the development of
biofuel production projects.
Biofuels of consideration are
primarily biogas (methane from
processing animal waste), with
considerations for ethanol and
biodiesel. ITR provides the overall
planning, permitting, financing,
construction, and operation of
biofuel production facilities.
About Guild Associates:
Guild provides adsorption and
catalyst systems to a variety of
markets as well as shop fabricated
engineered systems including
Molecular Gate systems. Guild
Associates is the exclusive USA
licensee of the Molecular Gate
technology originally developed by
Engelhard Corporation (now a part
of the BASF Group) and has
provided all systems to dateGuild provides adsorption and catalyst systems to a variety of markets as well as shop fabricated engineered systems including Molecular Gate™ systems.
To learn more about Guild Technology contact
Paul Baker, by phone, at 614-760-8013 or, by email, at email@example.com.