Article,
Different scale experimental techniques to approach the problem of substances generated in the loss of control of chemical systems: a study on ethyl diazoacetate decomposition
Journal of Loss Prevention in the Process Industries, 17 (1): 9--22 (January 2004)
DOI: http://dx.doi.org/10.1016/j.jlp.2003.08.012
Abstract
Article 2 of European Community Directive 96/82/EC (known as ‘Seveso-II’
Directive) also requires consideration in the plant inventory of
the dangerous substances ‘which it is believed may be generated in
the loss of control of an industrial chemical process’. The present
study was directed to the further development and assessment of procedures
for the identification of products formed in the ‘loss of control’
of chemical systems caused by exothermic decomposition reactions.
The specific aim was the development of procedures for the sampling
and identification of products formed in four different scale experimental
devices and the comparison of the results obtained. The methodologies
developed were tested on ethyl diazoacetate (EDA). The results obtained
indicated that sufficient agreement was present in the data obtained
for the thermal effects and for the apparent kinetic parameters of
the thermal decomposition. On the other hand, the analysis of the
decomposition products showed important differences both from the
qualitative and quantitative point of view. Operating conditions
such as pressure, heating rate, and residence time in the hot zones
of the experimental devices may become critical factors if a quantitative
analysis of decomposition products formed is required. Therefore,
the development of standard experimental procedures seems to be necessary
in order to apply Article 2 of the ‘Seveso-II’ Directive.
Tags
- accident
- analysis
- decomposition
- decomposition;
- hazardous
- hazards;
- major
- of
- products
- reactions;
- runaway
- substances;
- thermal
