European PHOtoREactor

K.L. Feilberg, et ah. Relative tropospheric photolysis rates of HCHO, (HCHO) C, (HCHO) 0, and DCDO measured at the European photoreactor facility, /. Phys. Chem. A109 (37) (2005) 8314— 8319. 

The problems associated with calculating photolysis rates can be overcome by the experimental determination of j values in outdoor simulation chambers, such as the European Photoreactor (EUPHORE), in Valencia, Spain (Becker, 1996). The decay of an aldehyde when irradiated by natural sunlight can be measured directly by FTIR spectroscopy or gas chromatography and the j values determined from a simple first order kinetic plot in the form of equation (III) ... 

Becker, K.H. (Ed.) The European Photoreactor EUPHORE, Final Report of the EC Project EV5V-CT92-0059, Wuppertal (1996). 

Thiault, G., A. Mellouki, G. Le Bras and K. Wirtz The photolysis of aromatic aldehydes in The European Photoreactor, EUPHORE, 4 report, (2001), 29. 

Volkamer, R., U. Platt and K. Wirtz OH reaction rate constants and photolysis frequencies of a series of aromatic aldehydes and phenols in The European Photoreactor, EUPHORE, 3" report, (2000) 1. 

Becker, K. H. The European Photoreactor EUPHORE , Final report, EC contract EV5V-CT92-0059, 1996. 

Although the entire MCM has been tested in atmospheric models, and through intercomparison with the results of chamber-validated mechanisms (e.g. Derwent et al, 1998 Jenkin et al, 2002), it has only been partially tested using environmental chamber data. It has been used in a number of studies involving die European Photoreactor (EUPHORE) in Valencia (EUPHORE, 2002), providing the basis for validation of the mechanisms for selected VOC. MCM v3 chemistry has thus already been tested for the photo-oxidation of a-pinene-NOx mixtures at comparatively low NOx concentrations (Saunders et al, 2003). The aromatic mechanisms in MCM v3 and MCM v3.1 have also been evaluated against a set of smog-chamber experiments the evaluation was focused on four representative species of the... 

This paper describes a project that was designed to study the products from sunlight, ozone, HO radical, and NO3 radical-initiated reactions (the latest in the dark) of diesel emissions with the aid of an environmental simulation chamber, under realistic ambient conditions (dilution in the range of 1 300 - 1 400). The European Photoreactor in Valencia, Spain, (EUPHORE) which is currently one of the largest (approximately 200 m ) and best equipped outdoor simulation chambers in the world, is employed for this study. 

Figure 1. The European Photoreactor EUPHORE in Valencia/Spain.

Zador, J., Wagner, V., Wirtz, K., Pilling, M.J. Quantitative assessment of uncertainties for a model of tropospheric ethene oxidation using the European Photoreactor (EUPHORE). Atmos. Environ. 39, 2805-2817 (2005a)... 

Zador, J., Zsely, I.G., Turanyi, T., Ratto, M., Tarantola, S., Saltelli, A. Local and global uncertainty analyses of a methane flame model. J. Phys. Chem. A 109, 9795-9807 (2(X)5b) Zador, J., Turanyi, T., Wirtz, K., Pilling, M.J. Uncertainty analysis backed investigation of chamber radical sources in the European Photoreactor (EUPHORE). J. Atmos. Chem. 55, 147-166 (2006a)... 

G6mez Alvarez et al. coupled PTR-MS with the European PHOtoREactor (EUPHORE) atmospheric simulation chamber (Valencia, Spain) to provide experimental confirmation of the dicarbonylic mechanism in the photooxidation of toluene and benzene [189]. The particular benefit of PTR-MS in this context is its relatively fast response time, which provides data that can be tested against a Master Chemical Mechanism (MCMv3.1) model. Differences in mass spectral fragmentation patterns also allowed PTR-MS to distinguish between cis- and fraws-butenedial, which are two of the products resulting from the photooxidation process. 

Sprensen, S., and 1. Barnes (1998), Photolysis of unsaturated 1,4-dicarbonyls, in, editors I. Barnes and J. Wenger, European Photoreactor EUPHORE Report 1997, pp.l49—164, University... 

Thiiner, L.P., G. Rea, and J. Wenger (2004h), in, editor 1. Barnes, The European Photoreactor EUPHORE 4th Report 2001, Valencia, Spain, February 2004. 

---