Results of initial single organic NOx and simplified ambient surrogate NOx experiments to demonstrate the utility of the facility for mechanism evaluation under low NOx conditions are summarized and compared with the predictions of the SAPRC-99 chemical mechanism.
Although our experimental data base is very limited for the low-NOx condition, the Peeters et al.
Aromatics (e.g. benzene, toluene, xylene and ethylbenzene) made the greatest contribution to SOA concentration (88.4% in low-NOx conditions and 80.6% in high-NOx conditions).
Fe L2 and Cu L2-based Cu L2-basedre acatalystsares NOx reduction under oxygen rich (leactive) conditowards
(2010b) was implemented in MCM v3.1 and the new UNC mechanism, since it has been recently been suggested to be very important under low-NOx conditions.
Comparison of the activity of the present and other perovskite-type materials has pointed out that the ability of the La0.5SrxCeyFeOz materials to reduce NO by CO or by CH4 under "lean-NOx" conditions is very satisfying.
For example, Hildebrandt et al.[ 39] report elevated SOA yields from toluene under high UV intensity, low-NOx conditions, and lower temperatures, relative to the parameters used typically in models.
Hydrothermal stability of mordenite type catalysts including synthetic (CuHM) and natural (CuNZA) zeolites has been examined under a simulated lean NOx wet condition.
It reveals that the Si/Al ratio of zeolite catalysts is one of the crucial characteristics enhancing the water tolerance and hydrothermal stability of the catalysts for NO reduction under the lean NOx wet condition.
More recent chamber studies show that SOA yields measured under NOx-limited conditions greatly exceed formation under NOx-rich conditions, and that SOA yields under NOx-rich conditions are even greater than were observed previously [ 24].
OSAT tends to apportion less ozone to biogenics as BVOC emissions increase, since that shifts marginal ozone formation toward more NOx-limited conditions.
