Photochemical ozone creation potential POCP

Analogous approaches to assessing VOC reactivities have been developed by Derwent and co-workers (e.g., see Hough and Derwent, 1987 Derwent and Jenkin, 1991 and Derwent et al., 1996) where a trajectory model is used to calculate the additional ozone production due to the addition of a particular VOC under conditions typical of air masses advected across northwest Europe toward the British Isles. The photochemical ozone creation potential (POCP) index thus calculated is a measure of the reactivity of the particular VOC in terms of 03 formation. Andersson-Skold and co-workers (1992) followed a similar approach for the summer conditions in southern Sweden. 

Smog formation Emission of smog precursors Photochemical conversion to ozone and other species Elevated ozone and aerosols in urban atmospheres Reduced plant growth, human morbidity and mortality Photochemical Ozone Creation Potential (POCP)... 

Photochemical ozone creation potential (POCP) [50-56] Emissions to air which lead to ozone production in the lower troposphere (close to ground level) Hydrocarbons... 

Photochemical Ozone Creation Potential (POCP) in kg C2H4-Equivalent... 

Photochemical ozone creation potential (POCP) measurements can give some guidance to the choice of solvent which cannot be recovered because quantities are too small. Quite surprising differences of POCP may be found with very similar volatility and solvent properties. 

Together with the rate coefficients of primary oxidant attack ( which correspond to the lifetime of the parent compound) NOCON factors may be used in atmospheric chemical - dynamic modelling to derive photochemical ozone creation potentials (POCP - values) for the individual hydrocarbons. POCP- values are expected to be the primary assessment factors in photochemical smog abatement strategies. 

Derwent, R.G., M.E. Jenkin, N.R. Passant, and M.J. Pilling (2007b), Photochemical ozone creation potentials (POCPs) for different emission sources of organic compounds under European conditions estimated with a Master Chemical Mechanism, Atmos. Env, 41, 2570-2579. 

POCP = photochemical ozone creation potential from Derwent et al. (1998). 

POCP (Photochemical Ozone Creation Potential) Total (mass of solvent [kg] x POCP value x Vapour Pressure (mm)]) mass of product (kg) x Vapour Pressure [toluene] x POCP [toluene]) Greenhouse Gas Emissions kg/kg as toluene... 

Derwent RG, Jenkin ME, Saunders SM, Pilling MJ (1998) Photochemical ozone creation potentials for organic cmnpounds in Northwest Europe calculated with a master chemical mechanism. Atmos Envirrai 32 2429—2441 POCP... 

Figure 1.14 Comparison of the most relevant ecological factors involved in the production of PLLA and fossil-based derived polymers. PED = primary renewable energy PED non-ren = primary nonrenewable energy GWP = global warming potential AP = acidification potential EP = eutrophication potential POCP = photochemical ozone creation potential ADP = abiotic resource depletion potential ...

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