Environmentally Friendly and Efficient

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1 Biogas Treatment H 2 S Removal - Extraction of Siloxanes Dehumidification Cost-Effective and Intelligent Biogas Conditioning Solutions

2 Best In Class Technologies Biogas Treatment & Conditioning especially designed for Biogas Plants Gas Treatment Environmentally Friendly and Efficient Our advanced 2G CHP technology utilizes biogas from the fermentation process (anaerobic digestion) in natural biodegradable material. The biogas, which is both efficient and economically beneficial, is used to generate electricity and heat. 2G biogas cogeneration modules are specifically developed for biogas applications. A strong Partner providing Best-in-Class Technology Worldwide 2G is the market leader for modular gaseous fuel CHP systems. 2G biogas power generation plants have been tried and successfully operated for many years. Manufacturing biogas cogeneration systems and gas treatment technologies requires more know how than just packaging a standard engine generator. 2G sets standards as technology leader. The company continues to lead the way with an unparalleled team of gas engine experts and significant research & development investments. More than 4000 CHP & Gas Treatment Systems installed Thousands of satisfied customers appreciate the reliability and high efficiency of 2G cogeneration modules. A combination of added value, costeffectiveness, and high system availability assure that customers enjoy the highest level of operational and economical results. When it comes to biogas and specialty gas power generation 2G customers don t take chances. Time after time the worlds leading biogas plant developers select 2G to safeguard their investment and success. Why? Because there is no higher level of quality, efficiency, and durability available. The number of installed 2G units say it all. 2G CHP Biogas & LFG Power Generation Systems with fully integrated Gas Treatment Technology Your Benefits Reduced Cost and higher ROI Reliability and Top Performance Less Risk, both Economically & Technically Overall better Economy and Added Value

3 Biogas Dehumidification Systems Including Re-Heating Technology Biogas Dehumidification - CHP Wall or Pad Mounted Incoming Gas Pipeline 2 Condensate Pit (Customer Scope, not provided by 2G ) 3 Gas Connection Point (Customer Interface), pre-flanged with Valve 4 Gas Cooling Section / Biogas Heat Exchanger 5 Gas Re-Heating Section / Biogas Heat Exchanger 6 Heat Circuits connected to CHP Mix Cooler Circuits 7 Exit Flange Connection (to H 2S or Siloxane Filter, or to Gas Blower) 8 Chiller Unit for Gas Cooling 9 Condensate Return Exit 10 Condensate Return Pipe (returning to Gas Inlet) 10 Condensate Release (by Gravity) 12 Condensate Drain (must be unobstructed) 12 Alternative Condensate Drain (optional) 13 Light Concrete Pad (Customer Scope, not provided by 2G ) 12 2* *This is just an example of a possible Condensate Pit. Various different types and designs are available in the market. 1

4 Biogas Dehumidification System Protect your CHP Investment & Efficiency Reduce Service & Maintenance Cost Gas Treatment Why is Biogas Dehumidification important? Biogas at the digester or LFG well outlet usually has a very high water vapor content (between 30 to 100g water per m³ Gas, equal to 1.06 to 3.53 ounce per 35 ft³), depending on the ambient temperature. That s approx. 270,000 liter (72,000 gallon) water per year, equal to approx. two standard size swimming pools. During wintertime, at lower temperatures, the water vapor can easily condense inside the gas pipeline leading to the CHP. This condensate in combination with H 2 S, NH 3,CO, and H 2, can cause accelerated corrosion. Further, condensate in the intake section automatically reduces engine efficiency. It also significantly reduces the effectiveness of H 2 S carbon filter systems. Gas drying optimizes the combustion process in the CHP engine, resulting in an increased engine efficiency and lower fuel gas consumption. Reducing the contamination of engine oil with condensate will reduce the number of oil changes required and save costs. In addition certain Methyl Cyclo Siloxane components, and Ammonia NH 3 are also harmful substances that are naturally partially released along with the condensate. Given that Ammonia is soluble in water, NH 3 contents are reduced during the water vapor removal / cooling & drying process. Water (high moisture content) can be one of the most destructive contaminants for engine lubricants. It accelerates oil oxidation and interferes with oil film production. High moisture content should also be removed from biogas to prevent the formation of Carbonic Acid. These acids cause a rapid drop in the oil's alkalinity (base number), resulting in an unprotected corrosive environment and base oil oxidation. Presence of these acids, if unnoticed, will accelerate wear and possibly even corrode critical engine parts that could result in major unplanned repairs and downtime. Gas Washer / Dryer Option for very large Biogas Volumes The 2G - SD gas washer/dryer GST-1000-S is designed for the dehumidification of bio and LFG gases. The main component of the 2G-SD gas washer/ dryer is a packaged column inside a reactor vessel, and the biogas streams upwards. In the opposite direction (downwards) flows very cold water. Within the reactor vessel an intensive exchange of heat and mass takes place between the cold water and the warm biogas. The gas cools down and the contained vaporous humidity condenses to fine fog droplets, which are captured by the cold water flow streaming downwards. The water is continuously recycled. No external water supply is required. Gas impurities like solid particles and certain harmful gas components are absorbed by the water according to their water solubility.

5 H2S & Siloxane Filter Technologies Innovations from the Market Leader Why is H 2 S and Siloxane Removal important? Why is the Investment a very smart Idea? High Concentrations of Sulphur, especially Hydrogen Sulfide H 2 S, and Volatile Methyl Siloxanes (VMS) often found in Biogas are harmful for any Engine or Turbine. VMS convert into Silicon Dioxide as Combustion takes place. The Silicon Dioxide combines with other Elements in the Gas, as well as with the Lubrication Oil, forming a hard Matrix that accumulates Surfaces, especially within the Combustion Chamber. As the Deposits accumulate, the Engines Efficiency reduces and causes irregular Detonation in the Combustion Chambers. The resultant unburned Fuel contaminates the Exhaust Gas increasing emissions. At this Point the Engine is at high Risk of significant Damage. Severe Damage can occur to Valves, Pistons, Piston Rings, Liners, Cylinder Heads, Spark Plugs and Turbochargers, necessitating premature Servicing and costly Repairs. PLEASE NOTE: Certain Suppliers of Engines and Turbines state that up to 800ppmv H2S is acceptable and it would not affect your 1 Year Warranty. It is important to understand that most H 2 S and Siloxane Damages occur after Warranty Expiration. At that time every engine owner operating without gas cleaning will experience significant Problems. As a Result, Service & Maintenance Costs are increasing quite significantly. We are aware that other Suppliers make potential Buyers to believe that it is OK to operate without Gas Treatment and that no H 2 S Removal is required. Such misleading Statements are not representing the Truth and Facts. It is always more cost-effective and your long-term Service Cost will always be cheaper if H 2 S and Siloxanes are removed and the Gas is treated. Your Benefits and Advantages: Fully integrated H 2 S and Siloxane Treatment Systems Most cost-effective Solution Activated Carbon Filter Media specifically developed for H 2 S and Siloxane Removal Maintenance Free Design Process optimized Configuration Proven Technology applied at Thousands of Biogas Plants High Sulphur (H 2 S) and Siloxane Content also damages the Exhaust Gas Heat Exchanger and the Exhaust System.

6 Advanced CHP Technologies Innovations from the Market Leader Contact the Cogen CHP Expert No better Solutions anywhere About 2G The 2G group is a renowned manufacturer dedicated to the production of advanced CHP decentralized power generation systems, providing customers with genuine plug & play, highly efficient and dependable cogeneration modules. The company maintains a Best-in-Class product portfolio. 2G is a solid and financially strong corporation publically traded at the Frankfurt Stock Exchange. 2G manufacturing plants are located in the USA and in Germany. Additional subsidiaries are operating in many countries. 2G s U.S. and South American distribution and service support headquarters 2G - CENERGY is located in Florida. For more Information Please visit our website at: 2G - Cenergy Power Systems Technologies Inc. 205 Commercial Drive St. Augustine, FL USA Tel.: Fax: info@2g-cenergy.com