Continuous Pre- and Post- Catalyst Hydrocarbon and Nitrogen Compounds-Monitoring of Various DeNOx Reactions by Twin Chemical Ionization Mass Spectrometry

Today's concepts of dynamic emission control in lean operating engines demand rapid monitoring of all relevant molecular components and their concentrations in pre- and post-catalyst exhaust gas.

Storage capacities and breakthrough characteristics of catalysts, reaction rates, response times and interference levels in NO sensors are no longer studied in stationary gas distributions; they must be evaluated under transient conditions [1].

A twin chemical ionization mass spectrometer (CIMS) system, enables simultaneous and synchronous monitoring of relevant gaseous components with dynamic capabilities from 0.1 ppm to 5000 ppm and a high time resolution.