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Guidance on safety / health for process intensification including MS design. Part I : reaction hazards

By Odo Klais, Frank Westphal, Wassila BENAISSA and Douglas Carson

Abstract

International audienceThe implementation of process intensification by multiscale equipment will have a profound impact on the way chemicals are produced. The shift to higher space-time yields, higher temperatures, and a confined reaction volume comprises new risks, such as runaway reactions, decomposition, and incomplete conversion of reactants. Simplified spreadsheet calculations enable an estimation of the expected temperature profiles, conversion rates, and consequences of potential malfunction based on the reaction kinetics. The analysis illustrates that the range of optimal reaction conditions is almost congruent with the danger of an uncontrolled reaction. The risk of a spontaneous reaction with hot spots can be presumed if strong exothermic reactions are carried out in micro-designed reactors. At worst, decomposition follows the runaway reaction with the release of noncondensable gases. Calculations prove that a microreactor is not at risk in terms of overpressure as long as at least one end of the reactor is not blocked

Topics: MICROREACTOR, PROCESS SAFETY, RUNAWAY REACTION, THERMAL EXPLOSION, [SPI]Engineering Sciences [physics]
Publisher: 'Wiley'
Year: 2009
DOI identifier: 10.1002/ceat.200900216
OAI identifier: oai:HAL:ineris-00963194v1
Provided by: HAL-INERIS
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