Gas Analysis to Engine Manufacturers’ Specifications - Test Methods
It is important that the quality of the land fill gas and anaerobic digester gas used in a gas engine is monitored before and during use to ensure that the gas will not cause unexpected damage to the gas engine parts.
Jenbacher, Deutz and Motoren-Werke Mannheim (MWM) have specific criteria for the gas being fed into the gas engines which will ensure simple maintenance and minimal wear.
Applications and Benefits
Regular sampling and testing is required to ensure that the gas being combusted in the gas engines is within acceptable parameters as specified in the engine manufacturer's regulations. Exceeding these limits is likely to increase wear and tear on the gas engines and cause excessive methane slip, extra maintenance, reduce the efficiency of the electricity generated and most importantly cause the emissions from the exhaust to fail the Environment Agency Emissions tests. Other issues can include chemical corrosion by acid species and build up of combustion products.
Engine Manufacturer Regulations
Jenbacher: Technical Instruction Number: 1000-0300
MWM: Technical Circular:0199-99-3017/4EN
Form of Results
The results will be reported in ppm and mg/m3 and are presented in a form which can be used as a certificate or conformity/non-conformity for the user or the engine supplier or service agent.
- Gas analysis to Environment Agency Technical Guidance Note 04 (LFTGN04)
- In house method for Siloxanes, and total silicon, in biogas and landfill gas by ATD-GC-MS
- In house method for Hydrogen Sulphide in biogas and landfill gas by GC-FPD
- In house method Bulk gases, including C2-C4 alkanes, in biogas and landfill gas by GC-FID/TCD
- In house method for trace volatile organic compounds, including C5-C12 alkanes, fluorine, chlorine, and sulphur content, by ATD-GCMS.
- In house method for formaldehyde and acetaldehyde on treated silica gel absorbent tubes collected from landfill gas by HPLC-DAD/UV
- Calorific value and methane number by calculation from the bulk gas results.