Guild Molecular Gate Technology - Ohio Water Environment ...

Green Energy – Guild Molecular Gate TechnologyDigester Gas Treatment for Energy Production /Pipeline Gas Production from WWTP Digester GasThe Ohio Water Environment Association2009 BioSolids Systems WorkshopDecember 10, 2009Guild Associates, Inc

Guild Products to the Natural Gas Industry• Molecular Gate for CO2 Removal• Compressors• Molecular Gate for N2 Rejection• TSA dehydrationd– Water removal• Sorbead “Quick-Cycle” dew point controlo– Water and heavy hydrocarbon removal systems• NGL Removal for CARB standards• CO2 removal for LNG / Peakshaver plants• Membrane units• Helium purifiers• Chiller Packages

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Guild ProjectsUnit Location SCFM Status Separation Start-up1 Ohio 140 Relocated N2 Aug. 20022 California 700 Operating CO2 May 20023 Texas 700 Operating N2 Aug 20034 California 7000 Operating CO2 Dec 20035 Kentucky 1050 Operating N2 May 20046 Illinois 1750 Operating N2 & CO2 May 20047 Indiana 2100 Operating N2 Dec 20048 Virginia 1400 Operating N2 and CO2 Feb 20059 Kentucky 700 Operating N2 Jan. 200610 SPEC #1 - OH 300 Operating N2 Dec. 200511 Virginia 1050 Operating N2 & CO2 Sept. 200512 SPEC #2 - WV 550 Operating N2 Dec. 200513 West Virginia 1050 Operating N2 April 2005

Guild Projects (Digesters in Blue / Landfill in Yellow)Unit Location Feed SCFM Status Separation Start-up14 SPEC #3 - ID 350 Operating CO2 May 200615 Virginia 7000 Operating N2 & CO2 Jan. 200716 West Virginia 1050 Operating N2 & CO2 Jan. 200717 SPEC #4 - WV 1050 Ready to Ship CO2 TBD18 UK 850 Operating N2 & CO2 May 200819 West Virginia 700 Ready to Ship CO2 TBD20 Pennsylvania 1400 Operating N2 & CO2 May 200821 SPEC #5 - ID. 350 Operating CO2 May 200822 SPEC #6 - IL. 350 Operating N2 May 200723 California 1000 Operating CO2 May 200824 Washington 5600 Operating N2 & CO2 March 200925 Tennessee 850 Operating N2&CO2 December 200826 West Virginia 600 Ready to Ship N2 TBD27 Canada 850 Operating CO2 June 200928 California 2300 Operating N2 & CO2 July 200929 California 850 On Site for Start-up N2 August 200930 Pennsylvania 5000 Operating N2 & CO2 June 200931 Texas 1250 Design CO2 January 2010Ohio < 100 SCFM Operating CO2 March 2009

Digester Gas Flow Balance – Single Step Processing0 psigFEEDCH4CO2H2SSiloxanesH2O100 psig90 psigGuild PSAAnd VacuumPumpPRODUCTPressure as neededCO2 = 1 to 2%H2S = < 4 ppmSiloxanes < 20 ppbH2O = 7 lb/MM SCFTAIL GAS3 psigCO2, H2S, H2OLost Hydrocarbons

Process Steps – Digester GasProductGuildPSA andVacuumPumpFeedCompressionTail GasTo Flare orBoilers

Digester Gas Upgrading Process StepsSales GasSmall Methane PurgeCO2 = 1 to 2%AdsorptionFlowUpwardCO2H2SSiloxanesVOC’sH2OCO2Siloxanes – VOCH2SH2ORegenFlowDownwardFEEDVacuumPump“Tail Gas”

Typical Digester Material Balance (Methane Recovery = 90%)Feed Sales Gas Tail GasFlow 100 55 45Pressure, psig 100 90 3Temperature, F 100 100 150Composition, Mol %C1 60.00 99.00 13.20CO2 39.60 1.00 85.92H2S 0.40 < 4 ppm 0.88Siloxanes ~ 10 ppm < 20 ppb By DifferenceH2O Saturated 7 lb/MM SCF WetHHV BTU/FT3 609 1000 139

Pipeline Acceptance•Intrepid Technology and Resources, ID (Two units)– Extensive testing of product stream purity– Quality accepted by Intermountain Gas Company– Sales also accepted as CNG meeting DOT regulations– Removes 40% CO2 to

Project Optimization•H2S– May or may not require treatment.– Can treat on tail gas stream (preferred) or feed stream– Options:• No Treatment, Digester Additives, Biological Treatment,Sulfatreat / Iron Sponge, Liquid Redox• Tail Gas Disposal– Enclosed thermal oxidizer if design for high methane recovery– Digester heating possible with combustion of tail gas.– Recovery of heat from compression or flare. Generally expensiveand limited to larger flows• Required Pipeline Pressure– High pressure requires additional compressor

Gas Costs, $/MCF ($/MM M BTU)4.50400 4.003.50300 3.002.502.001.501.000.500.00Product Based Processing Costs, $/MCFIncludes = Feed compression, PSA, Flare, Pipeline Tap,Installation, Power (5 cents/kW), Maintenance, Man-PowerProcessing Costs (Product Flow Basis)10 year project at 8% Loan200 350 500 1000 1800Feed Flow, SCFM

TidelandsCO2 Removal System1 MM SCFD38% CO2Removed to

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Green Energy – Guild Molecular Gate TechnologyDigester Gas Treatment for Energy Production /Pipeline Gas Production from WWTP Digester GasThe Ohio Water Environment Association2009 BioSolids Systems WorkshopDecember 10, 2009Guild Associates, Inc