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On January 7, 2013, a lithium-ion battery caught fire on a Boeing 787 Dreamliner. Watch this PStv® Safety Moment for an examination of the root causes of this incident and the implications for electric vehicles. In this video, we also present process safety design lessons learned to help you prevent future incidents.
A major petroleum company recently increased production capacity and required an analysis of its existing relief systems to validate performance and design. As a result of increasing production capacity and debottlenecking studies, several refinery units were found to be operating at charge rates higher than the design basis for the relief systems documentation.
An international oil company was preparing to startup a state of the art acid gas injection facility and needed to benchmark against current industry practices for handling large quantities of toxic gas at high pressure.
A supplier was being sued because his product, when delivered, went into the wrong storage tank. This led to a chemical reaction and release of chlorine to which the plaintiffs claimed they were exposed.
Regarding vessels and tubes containing combustible gases or dusts, it is important to acquire knowledge on the conditions under which a fuel and oxidizer could undergo explosive reactions. These conditions are strongly dependent on the pressure and temperature. Given a premixed fuel-oxidizer system at room temperature and ambient pressure, the mixture is essentially unreactive. However, if an ignition source is applied locally and the composition of the mixture is within certain limits (the so-called flammability limits), a region of explosive reaction can propagate through the gaseous mixture due to mainly two phenomena:
Characterizing potential explosive reactions is one of the main objectives of hazard assessment. Safeguards to be implemented in process equipment, best process conditions, appropriate prevention and/or mitigation measures, are some of the key purposes to be clarified when handling flammable mixtures. This characterization requires knowledge of several parameters that directly influence on the explosive reaction behavior. One of these parameters is the Laminar Flame Speed, one of the key factors that define the kinetics of the reaction. The present paper addresses how to characterize fuel-oxidizer explosive reactions, and highlights the importance of the laminar flame speed concept. The primary goal of this research is to provide reliable data on laminar flame speeds in order to ensure accurate calculations for a Process Hazard Analysis (PHA).
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