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Introduction – Real-time exhaust emission monitoring

Air pollution has been attributed to automobile exhaust as the major source. Combustion engines used in cars, aircraft, ships, power plants, etc. emit many air pollutants that have been shown to have a variety of negative effects on public health and the natural environment.
Emission testing of combustion engines has therefore been the focus of
intense studies. Apart from the emissions comprising carbon monoxide (CO), nitrogen oxides (NOx), particulate matter, and sulfur oxides (SOx), also volatile organic compounds (VOCs) and their atmospheric photochemical reaction products have drawn much attention due to their negative impact on the atmosphere and their dangers to public health.

PTR-MS is an analytical technique to quantify hydrocarbons and VOCs with high sensitivity and in real-time. The capability to monitor emissions in real-time is particularly useful to investigate the fast changing conditions in the combustion process and to evaluate the impact of control technologies. Especially the initial cold start phase in cars or idle phase in aircraft engines, which is responsible for a large fraction of emitted compounds, as well as hard acceleration phases, require a real-time (or online) analysis. Looking at the exhaust composition allows investigating which processes and parameters are responsible for those emissions.

Major reasons our customers choose PTR-TOFMS to monitor exhaust emissions:

Related Publications

Monitoring exhaust gas from combustion engines, emitting a large number of different compounds and with rapidly changing concentrations due to variations in operating conditions, necessitates an instrument that measures in real-time and with high sensitivity – an IONICON PTR-TOFMS.

Automotive Applications

Real-time vehicle exhaust analysis

Jobson, B.T.. et al., 2005.