Influence of calorimetric approximations on the design of emergency relief systems |
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| Institution: | 1. Dipartimento di Chimica Fisica Applicata, Politecnico di Milano, via Mancinelli, 7, 20131 Milano, Italy;2. Health, Safety and Environmental Department, Snamprogetti S.p.A., Viale de Gasperi, 16, 20097 San Donato Milanese, Italy;1. Key Laboratory of Pressure Systems and Safety (MOE), School of Mechanical Engineering, East China University of Science and Technology, Shanghai 200237, China;2. Department of Mechanical and Aerospace Engineering, University of Strathclyde, Glasgow, United Kingdom;1. Mitsubishi Chemical Corporation, 1000, Kamoshida-cho, Aoba-ku, Yokohama-shi, Kanagawa 227-8502, Japan;2. Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama-shi, Kanagawa 240-8501, Japan;1. Mary Kay O’Connor Process Safety Center, Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843-3122, United States;2. University of Bologna, DICAM, Via Terracini 28, 40120 Bologna, Italy;3. Mary Kay O’Connor Process Safety Center at Qatar, Texas A&M University at Qatar, PO Box 23874, Education City, Doha, Qatar |
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| Abstract: | The design of an emergency relief system (that is, a pressure safety valve or a rupture disk) for vessels, which may involve runaway reactions, requires knowledge of the chemical kinetics of the reactions involved. When safety-related problems are considered this is usually achieved using calorimetric tests, coupled with some suitable approximations on the kinetics of the reacting system. In this work we have analysed the extent to which the precise knowledge of the chemical kinetics influences the size of the relief system device for different reaction conditions. Decision criteria are proposed to identify situations where approximations in the kinetic mechanism lead to underestimation in the venting area. |
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