Low VOC Concentration Vapour Recovery Units


Thermal Regenerated Activated Carbon System, TRAC™


VOCZero offers a range of Vapour Recovery Systems (VRU) for recovery of relatively low concentrations of volatile organic compounds from vapours. These systems are in particular well suited for areas, where extreme low VOC emission in the ppb-ppm level is required, like in many petrochemical facilities.


The process is based on adsorption of VOCs on activated carbon followed by steam regeneration of the carbon. This technology is valued to be among the best available, for applications like storages and loading operations.


The design and selection of parts are made to achieve a durable, safe and efficient process plant, and are based on international standards recognised in the oil and gas industry, such as ASME VIII, ASME B31.3, EN 60079 & EN 1127.

The typical vapours to be treated are:


  • Gasoline

  • Diesel

  • E5-E100 Gasohol (Ethanol)

  • Methanol

  • Benzene

  • Toluene

  • Xylene

  • MTBE

  • ETBE

  • Naphtha

  • Crude Oil

  • Gas Condensate

The VRU’s are designed to meet the stringent health and safety requirement set out by European ATEX and Machinery directives.

VOC Emission standards

  • 1 ppm

  • 150 mg/Nm³

  • 100 ppm

  • 300 ppm

  • Application specific emission standard

Key features

  • Modular design

  • Energy efficient

  • Prefabricated pipes and steel makes installation simple



Low VOC concentration vapour from storage tanks or other VOC handling facilities, typically having VOC concentration in the range of 1 - 4%vol., is collected in a sealed vapour header, and passed to one of two activated carbon filter in the VRU.


The VOC vapour will flow down through the activated carbon layer, where the VOC molecules are adsorbed onto the surface of the activated carbon, while the inert gas/air exits the filter vessel at the bottom.


When the activated carbon reach saturation, the regeneration process is initiated.

The activated carbon are thermally regenerated by means of steam. As activated carbon has a much higher affinity towards water molecules than VOC, the carbon readily releases the VOC molecules, when 100°C steam is passed up through the activated carbon bed. Steam regeneration will take place until the activated carbon and vessel is heated up, and a temperature break-through is detected in the top of the activated carbon filter vessel.


The released VOC and steam will flow to an air-cooled condenser, in which the steam will be condensed, and following drained off in a separator. From the separator the pure VOC vapour is passed to the bottom of a packed absorber column, in which the VOC vapour will be partly absorbed, partly condensed, into a stream of a suitable absorbent media, taken from a nearby storage tank. The absorbent now containing the recovered VOC, is collected in the bottom part of the absorber, and pumped back to the storage tank.


After regeneration, the activated carbon must be dried, and subsequently cooled down, before the carbon bed is ready for another adsorption cycle.


VOCZero Representative

VG Industrial Solutions

The Nederlands

Niels van Gent

Phone: +31 6508 19690

E-mail:  info@vg-indu.nl



VOCZero Representative

JSP Associates

No. 214, B N Chambers RC Dutt Road,

Alkapuri, Vadodara-390007,

Gujarat, India

Email: jaimin@jspassociates.in


VOCZero Partner

PT.Prolindo Aditya Prima

Graha Mandiri 31 Floor, Jalan Imam Bonjol 61

Jakarta 10310

Mobile: +62811898989

Email: Soebiakto@mac.com

South Africa

VOCZero Representative

Butla Holdings

9 Cypress Street, Dawn Park Ext 37

Boksburg 1459

Office: +27 (82) 96 14 482

Mobile: +27 82 841 7351


Spain & Portugal

VOCZero Representative

Sparktrol SL

Rua da Brua 29, Vilacova,

Santiago De Compostela,

A Coruna, Spain


Nico Menghi

Phone +34 625 207576.

Email: nico.menghi@sparktrol.com



VOCZero Partner


Yesiloba Mahallesi Mehmet Baspinar Orta Olcekli Sanayi Sitesi
46067 Sokak C Blok Daire : 7 / 9    Seyhan / ADANA 


Tel: +90 530 603 1013 / +90 322 428 70 67


United Kingdom

VOCZero Partner

Assentech Sales Limited

Mount Pleasant Farm


St Austell

Cornwall PL26 6LR

Office: +44 (0) 1726 844 707

Mobile: +44 (7770) 578935

Email: ewart@assentech.co.uk


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