Runaway reaction of non-tempered chemical systems: Development of a similarity vent-sizing tool at laboratory scale

Luc Vechot, Jean Pierre Bigot, Daniele Testa, Marc Kazmierczak, Patricia Vicot

Research output: Contribution to journalArticle

11 Citations (Scopus)


A new experimental "similarity" vent-sizing tool (A/V ratio) for non-tempered chemical systems was developed. It combines the advantages of both the Design Institute for Emergency Relief Systems (DIERS) method (laboratory scale) and UN method (less overconservative). This tool is based on the VSP2 adiabatic calorimeter. It uses a 0.1 l test cell and allows blowdown experiments to be carried out in the 0.9×10-3 m-1 <A/V<4.0×10-3 m-1 range. A simple additional set-up allows for real-time vented mass measurements. Similarity limitations are discussed. Sizing experiments for an organic peroxide (cumene hydroperoxide 30% w/w) using both the "similarity tool" and the UN 10 l reactor are compared. The similarity tool is on the safe side (0-50% oversizing). Heat losses are the main limits of the new tool.

Original languageEnglish
Pages (from-to)359-366
Number of pages8
JournalJournal of Loss Prevention in the Process Industries
Issue number4
Publication statusPublished - Jul 2008
Externally publishedYes



  • Blowdown
  • Cumene hydroperoxide
  • Non-tempered reaction
  • Similarity
  • Vent sizing

ASJC Scopus subject areas

  • Chemical Health and Safety
  • Process Chemistry and Technology
  • Safety, Risk, Reliability and Quality

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