MINI-CAT™ Brochure (PDF 151 KB)

KNOCK OUT HYDROGEN SULFIDE WITHCOMPLETE PACKAGED SYSTEMSFOR COST-EFFECTIVE HYDROGENSULFIDE REMOVALGas Technology ProductsMerichem Chemicals &Refinery Services LLCMINI-CAT™ MINI-CAT™ was born out of the LO-CAT® H2S removaltechnology which treats sulfur loads between 1,000kg/day and 25+ tons per day. With MINI-CAT™, GasTechnology Products is building on this tradition ofsimplicity and success by pre-engineering virtually theentire plant for sulfur loads between 200 – 1,000 kg/day.With this simple change to a commercially successfultechnology in operations for 27 years, the result isnothing short of revolutionary. Capitol cost may bereduced significantly compared to a similar customdesigned unit. And delivery and installation time maybe reduced by as much as 50%.MINI-CAT™ is cost-effective in removing H2S innumerous applications including landfills, municipalwaste, and biogas treatment. In comparison to old fashioned “scavenger” H2Sremoval systems MINI-CAT™ will reduce chemical costs up to 80% (more if you use a liquid scavenger),continuously remove H2S without unexpected sulfurbreakthrough, eliminate the need for reactor change-outs, and cut waste products in half.REMOVING H2S FROM LANDFILLGAS (LFG) Gas Technology Products offers a line-up of cost-effective, environmentally-friendly, and powerful H2Sremoval systems that are adaptable to landfill gastreatment applications. The MINI-CAT™ process, based on proven LO-CATtechnology, treats smaller H2S loads using the samechemistry as LO-CAT. However, MINI-CAT™ is especiallyattractive and cost-effective for many landfill gasapplications as a modular option with lower capitalcost than LO-CAT. MINI-CAT™ units are pre-fabricated,skid-mounted, have a small footprint, and offerexpanded flexibility for variable landfill gas flows andH2S concentrations. MINI-CAT™ is a water-based H2S removal process forlandfill gas applications with higher H2S concentrations.Typically, LO-CAT is used for removing 1,000 – 10,000 kgof sulfur per day as H2S; MINI-CAT™ for removing 200 – 1,000 kg (440 – 2,200 lb) sulfur per day as H2S. The patented LO-CAT® (liquid oxidation catalyst)process uses an iron chelate solution to oxidize the H2Sto elemental sulfur and water. The iron chelate solutionis then continuously regenerated using air, resulting inmuch lower operating costs than non-regenerablescavengers. The elemental sulfur product can be usedfor agricultural applications—so it is not a wasteproduct requiring disposal. Different configurations are employed to yield betterthan 99.9% H2S removal. In the mobile bed absorberconfiguration, moderately low pressure gas streamsare contacted counter-currently with LO-CAT solutionusing spherical balls to aid in mixing. Venturi contactorsare used for low pressure, high volume gas streamswhere the required sulfur removal efficiency is lower. Inall configurations, the elemental sulfur is separated, theLO-CAT solution is regenerated with air in a separateOxidizer vessel, and the solution is circulated back tothe absorber. To help determine the right process for your needs, use the following formulas:[(SCFM gas flow) x (ppmv H2S)]/8225 = lb/day sulfur[(Nm3/hour gas flow) x (ppmv H2S)]/29671 = kg/day sulfurREDUCED OPERATING COSTSTo illustrate typical savings in operating costs, considerthe typical landfill sulfur generation profile below.Cost savings, based on a twenty year operating cycle,are shown in the table below.MINI-CAT™SYSTEMS PROVIDE COST-EFFECTIVE H2S REMOVAL IN LANDFILL GAS APPLICATIONS0.00.20.40.60.81.01.21.4Typical Landfill Sulfur Recovery, LTPDYear of RunTechnology TypeAerobic IronSpongeMINI-CAT$200,000$1,500,000*$13,025,000$1,450,000Savings:$13,225,000$2,950,000$10,275,000Capital Cost USDTreatment Cost USDTotal Costs USD* = installed cost As the table indicates, the landfill operation wouldrealize a savings of more than $10,000,000 usingMINI-CAT™ technology.HOW MINI-CAT™ WORKSThe MINI-CAT™ process uses the same special form of chelated iron catalyst field-proven in the LO-CATprocess. This liquid, aqueous solution sweetens sourgas, produced elemental sulfur. The overall reaction,using oxygen in the regeneration step, is shown below:THE MINI-CAT™ PROCESSIn the gas contacting area, gas is sweetenedwhen it contacts the ferric iron chelatesolution, creating a spent solution.The spent solution is mixed with air, convertingferric iron chelate to a ferrous iron chelatesolution, resulting in a regenerated solution.The regenerated solution is clarified bydecanting, cleaning the solution andthickening the solid sulfur particles.In a final solids filtration step, the sulfur isfiltered from the thickened sulfur particles.Water and solid elemental sulfur are producedby the MINI-CAT™ process. Water is removedto preclude diluting the process solution, and sulfur is removed by filtering, so that thisby-product can be sold as an agriculturalfeedstock—to be used as a fungicide, in directsoil applications. Solution Regeneration Solids SeparationSolids FiltrationGas ContactingSour Raw Landfill GasReduced (spent) SolutionSulfur SlurryAirBlowdownLiquid FiltrateFiltered SulfurSweet Treated GasRegenerated SolutionEASY OPERATIONYour operating time is greatly reduced with theMINI-CAT™ process. Typically, operators spend onlythirty minutes each day taking chemical inventoriesand running basic field tests to determine the pH and Redox potential of the MINI-CAT™ solution. Gas Technology Products laboratory personnel will test the solution samples for iron concentration andchelate concentration to help you maintain propersolution chemistry. Merichem Chemicals & Refinery Services LLCGas Technology Products Division846 East Algonquin Road, Suite A100Schaumburg, IL 60173 Phone: (847) 285-3850Fax: (847) 285-3888/3889www.gtp-merichem.comJapan Office:Phone: (81) 3-5289-4530Fax: (81) 33-255-5181