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Constituent Jenbacher Deutz Caterpillar Waukesha and then reheating to 29 - 35oC; dew point should be at least 11oC below temperature of inlet gas Pressure at inlet Turbocharged engines: 80 - 200 mbar Up to 2 000 bar - - - Pre-combustion chamber: Models 612- 616: 2,500 – 4,000 mbar Model 620: 3,000 – 4,000 mbar - - - Gas pressure fluctuation <10 mbar/second < ±10 % of set value at a frequency of <10 per hour - - Inlet gas temperature CH4 (% v/v) 4 Methane Hydrogen (% v/v) <40 oC - - - 10-50 oC 40 % ~140 for landfill gas - - > -29 oC and <60 oC Recommended - ratio of CH4: CO2 is 1.1 – 1.2 - - - <12 % 1 Relative limiting value of <0,02 according to the following calculation (without catalyst): Relative limiting value = (mg/kg Si in engine oil) x (total oil quantity in litres) (engine power in kW) x (oil service time in hours) 23 Specifications stated by manufactures in mg/MJ were converted to mg/Nm CH4 assuming a calorific 3 value for CH4 of 37.5 MJ/Nm . 33 Specifications stated by manufactures in mg/l landfill gas were converted to mg/Nm CH4 assuming 50 4 per cent CH4 (v/v). Methane number for natural gas is typically between 70 and 92; methane 100 (knuckles) and hydrogen 0 (knock-friendly). Source: [8]. Among the many components of landfill gas, sulphur, chlorine and fluorine compounds are the most harmful to equipment and the environment. Combustion products such as SO2, HCl and HF work to the detriment of machinery and the environment. When combusted in reciprocating engines, LFG containing sulphur and chlorine compounds shorten the useful life of engine oils and impact the efficiency of catalysts. Their harmful 44PDF Image | Landfill Gas Energy Technologies
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