Abstract
AbstractSubsurface addition is commonly used in the chemical industry as a means of ensuring that the incoming reagent is distributed uniformly within a batch as the addition proceeds. The difference between subsurface addition and the typical above‐surface addition is in how the inlet liquid stream enters the vessel. When calculating the process vent emissions for an above‐surface addition one considers the partial pressure of the inlet stream components along with the batch components. This is because both mixtures have direct exposure to the vessel headspace during the addition process. For subsurface addition, volatile compounds that are contained in the inlet stream are exposed to the headspace only as they appear in the batch during the addition process. The purpose of this paper is to present a model for estimating the vent emissions for subsurface addition processes based on the integrated average liquid‐phase composition. © 2004 American Institute of Chemical Engineers Environ Prog, 2004
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