Hydrogen Vent Flare Stack Performance

  • A. Lapin
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 12)


This paper describes the tests that were performed to establish practical limits for a hydrogen vent flare stack operating under adverse weather conditions. The basic components of the vent stack are a flare, molecular seal, flame front generator ignition system, pilots, support skirt, associated piping, valves, and gauges; all assembled and mounted on a concrete pad as shown in Fig. 1. The molecular seal (John Zink Company) is a device to reduce purging requirement and is identified in Fig. 2. It uses the differential molecular weights of gases to form a seal. This is accomplished by bleeding a lighter-than-air gas into an inverted cylinder which is sealed at the upper end. The flare pilot details are shown in Fig. 3.


Wind Velocity Gaseous Hydrogen Hydrogen Flow Full Flow Extinction Test 
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Copyright information

© Springer Science+Business Media New York 1967

Authors and Affiliations

  • A. Lapin
    • 1
  1. 1.Air Products and Chemicals, Inc.AllentownUSA

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