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Vapor Recovery Around the World |
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Europe |
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| The Vaconovent unit, a back-end unit manufactured by GKSS’ European licensee, Aluminium Rheinfelden, is approved by TUV Rheinland for recovery efficiency and by PTB for safe operation. A 1998 study by TUV Rheinland certifies an overall hydrocarbon recovery efficiency of 93 percent, including gasoline spillage at the nozzle/fillpipe interface.
Without liquid spillage, overall recovery efficiency is greater than 96 percent, which means that the efficiency of the back-end membrane unit is about 98 or 99 percent. Additional information on the study may be obtained from TUV Rheinland at www.tuevrheinland.de/enghome.htm. Presently, multiple membrane units are operating in Germany, Luxembourg, Switzerland and the UK. In Luxembourg, based on the significant TUV report results, the membrane vapor recovery system is considered best available technology (BAT) and all new stations being constructed in densely populated areas must use the system. Additional information on the Luxembourg requirements may be obtained by contacting the Luxembourg Ministry of Environment; www.mev.etat.lu/ home.html. The units’ performance in Luxembourg are being monitored in the framework of a "DGMK project". DGMK is a technical organization that conducts projects for all the German oil companies. The vent and fugitive emissions generated at select sites are being quantified by the use of a novel optical technique developed in collaboration with the Fraunhofer research institute. In essence, a control volume will be formed by placing laser sources and sensors on the boundary of a service station. Hydrocarbon molecules entering and exiting the control volume will be measured and an emission factor will be tabulated. Results from this leading-edge laser diffraction technique are expected in August 2000. Bulk terminal gasoline vapor recovery systems using larger scale versions of the GKSS membranes have been successfully operating throughout the world since 1989. Each of the 66 systems installed since 1989 has been consistently operating in tank farms and ship loading terminals without any membrane replacements. The performance and long-term stability of these hydrocarbon-selective membranes are commercially proven; such systems are considered an established technology in Europe. |
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