If you don't know how to estimate fugitive and diffuse emissions, the new EN 17628 just came at hand

en17628   The European Standard EN 17628, just published, now defines not just one method but five different methodologies to evaluate fugitive and diffuse emissions of Volatile Organic Compounds (VOCs). Isn't that wonderful? Well, hold your horses because they ain't easy methods!

  EN 17628 deals with Fugitive and diffuse emissions of common concern to industry sectors. This standard defines a series of methodologies to determine diffuse emissions of VOCs into the atmosphere from industrial sources. These methods are Optical Gas Imaging (OGI), Differential Absorption Lidar (DIAL), Solar Occultation Flux (SOF), Tracer Correlation (TC), and Reverse Dispersion Modelling (RDM).

  OGI uses an infrared thermal imaging camera fitted with an optical filter, which is sensitive to IR absorption by certain VOCs. The camera enables VOC plumes to be visualised, appearing as clouds of vapour on the camera.

  DIAL is a technique which uses pulses of laser light in the infrared and ultraviolet spectral region transmitted into the atmosphere to determine the concentration and location of VOCs in the atmosphere. The technique can determine the spatial concentration over an area typically up to 500 m to 800 m with a spatial resolution of approximately 10 m.

  SOF uses FTIR spectrometry to analyse sunlight passing through the atmosphere and detected from a mobile system. An integrated concentration profile is obtained by measuring downwind of the VOC sources and intersecting the plume with the measurement path.

  TC uses tracers such as C2H2 or N2O that can be easily measured downwind, usually with a mobile monitor. In this case, the emission rate of the source gas can be calculated, provided there is a relationship between the release rate of the tracer gas and the measured mass concentration in the emission plume of both the tracer gas and the source gas.

  Last but not least, RDM is a well-known asset in the toolbox of the odour manager, as it is well described in EN 16841, part 2. However, this standard uses a much different approach, more related to the one described in the European standard EN 15445.

  If you want to know more about these methodologies to estimate diffuse and fugitive emissions from VOCs, you are lucky because this standard is available for purchase. However, as usual in these standards, they can be purchased in any European country with different pricing, so we recommend looking for various alternatives. For example, here, you may get the standard in English at competitive pricing.


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Carlos Nietzsche Diaz Jimenez's Avatar

Carlos Nietzsche Diaz Jimenez

Carlos is the editor-chief of olores.org and has been in the odour world since 2001. Since then, Carlos has attended over 90 conferences in odour management, both national and international and authored a few papers on the subject. He has also organized a few international meetings and courses. Carlos owns a small company named Ambiente et Odora (AEO). He spends his free time with his wife and his twins, Laura and Daniel, and of course, writing on olores.org.

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