title: Secondary organic aerosol formation by irradiation of 1,3,5-trimethylbenzene-NOx-H2O in a new reaction chamber for atmospheric chemistry and physics.
abstract: A new environmental reaction smog chamber was built to simulate particle formation and growth similar to that expected in the atmosphere. The organic material is formed from nucleation of photooxidized organic compounds. The chamber is a 27 m3 fluorinated ethylene propylene (FEP) bag suspended in a temperature-controlled enclosure. Four xenon arc lamps (16 kW total) are used to irradiate primary gas components for experiments lasting up to 24 h. Experiments using irradiations of 1,3,5-trimethylbenzene-NOx-H2O at similar input concentrations without seed particles were used to determine particle number and volume concentration wall loss rates of 0.209+/-0.018 and 0.139+/-0.070 h(-1), respectively. The particle formation was compared with and without propene.
authors.affiliation: Laboratory of Atmospheric Chemistry, Paul Scherrer Institut, CH-5232 Villigen, Switzerland.
authors.forename: Dwane
authors.initials: D
authors.lastname: Paulsen
authors.forename: Josef
authors.initials: J
authors.lastname: Dommen
authors.forename: Markus
authors.initials: M
authors.lastname: Kalberer
authors.forename: André S H
authors.initials: AS
authors.lastname: Prévôt
authors.forename: René
authors.initials: R
authors.lastname: Richter
authors.forename: Mirjam
authors.initials: M
authors.lastname: Sax
authors.forename: Martin
authors.initials: M
authors.lastname: Steinbacher
authors.forename: Ernest
authors.initials: E
authors.lastname: Weingartner
authors.forename: Urs
authors.initials: U
authors.lastname: Baltensperger
mesh_terms: D000336:Aerosols / Q000032:analysis / Q000737:chemistry*; D000393:Air Pollutants / Q000032:analysis; D000475:Alkenes / Q000737:chemistry; D001272:Atmosphere / Q000737:chemistry; D001555:Benzene Derivatives / Q000737:chemistry*; D002627:Chemistry, Physical / Q000295:instrumentation / Q000379:methods*; D009589:Nitrogen Oxides / Q000737:chemistry*; D009930:Organic Chemicals; D010083:Oxidants, Photochemical / Q000032:analysis; D011827:Radiation; D012905:Smog / Q000032:analysis; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry*
chemical_list: C482494:1,3,5-trimethylenebenzene; D000336:Aerosols; D000393:Air Pollutants; D000475:Alkenes; D001555:Benzene Derivatives; D009589:Nitrogen Oxides; D009930:Organic Chemicals; D010083:Oxidants, Photochemical; D012905:Smog; D014867:Water; C013658:propylene