Senior Scientist, SenseAir AB

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Presentation transcript:

Senior Scientist, SenseAir AB Possibilities using non dispersive IR-technology for in vehicle measurement of methane gas quality Ph.D. Henrik Rödjegård Senior Scientist, SenseAir AB henrik.rodjegard@senseair.com Ph.D. Ola Stenlåås Ph.D. Henrik Rödjegård

My message Methane gas from different sources, such as bio gas reactors, differ a lot in composition. IR-sensors can be used to determine combustion properties of methane gas fuel by measuring the amount of methane and heavier hydrocarbons. A low-cost system can be implemented in the vehicles fuel system. Before starting the engine the sensor will give a hint of the gas properties. http://www.sgc.se/ckfinder/userfiles/files/SGC252.pdf

SenseAir AB World leading company in Research & Development and manufacturing of cost-effective IR gas sensing Develops and produces affordable precision carbon dioxide sensors for high volume applications Competence centre for infrared gas measurements One of our major markets is building automation where our sensors control the ventilation to create a better indoor environment. 3

SenseAir AB

NDIR basics (Non Dispersive Infra Red)

NDIR basics (Non Dispersive Infra Red)

NDIR basics (Non Dispersive Infra Red)

NDIR basics (Non Dispersive Infra Red)

IR-spectrum

Optical filter choice

Optical filter choice

Predicted performance Methane 70% to 100% ±2% “Butane equivalents”* 0% to 15% ±1% Inert gas content ±3% Response time ~10 s Pressure up to 10 bar Calibration free due to automatic baseline compensation * Ethane= 0.6 Butane equivalents Propane = 0.8 Butane equivalents

A few words about high resolution sensing… …a GC replacer?