Inherently safer processing: batch and semi batch reactors for exothermic processes. Impact on relief sizing

摘要

Semi-batch processes for strongly exothermic chemical reactions are, in principle, inherently safer than batch processes. This is most evident if they are operated under feed rate limited conditions. This paper shows how a combination of isotermal and adiabatic calorimetry can be used to extend the DIERS vent sizing methodology to apply to semi-batch operations. "Vapour presure" and "gassy" systems are considered when the reaction rate is either kinetically controlled or feed-rate controlled.