Take a life-cycle view of site remediation
Article Abstract:
Government and corporate policies for risk reduction at contaminated sites, which are common in many urban areas, seldom evaluate total risk within a broad geographic and temporal context. The life-cycle approach to remediation enables a systematic review of potential impacts beyond those immediately associated with contaminated sites and thus promotes the consideration of potentially wider impacts on human and ecological health. A life cycle framework has been developed specifically for assessing contaminated soil and groundwater remediation options. It may be used as a decision-making tool to select options to minimize environmental and human health burdens.
Publication Name: Chemical Engineering Progress
Subject: Engineering and manufacturing industries
ISSN: 0360-7275
Year: 1998
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Model for multicomponent gas separation developed
Article Abstract:
Three researchers have developed a model for multicomponent gas separaton that utilizes hollow fiber contactors. The model permits the simulation of co-current, counter-current and radial cross-flow contacting patterns with permeate punging. The model uses a numerical approach to bring the simulation to considerably higher stage cuts than previously published models. This numerical technique also provides rapid and stable solutions for cases involving many components, even when the mixture contains components with widely varying permeability coefficients.
Publication Name: Chemical Engineering Progress
Subject: Engineering and manufacturing industries
ISSN: 0360-7275
Year: 1998
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Easily predict structured-packing HETP
Article Abstract:
The increasing popularity of structured packings in distillation has given rise to the need for an efficient shortcut technique for predicting the height equivalent to a theoretical plate (HETP). A new, simple to use, shortcut method for HETP using the best of previously published, rigorous models for structured-packing HETP has been developed. It will be shown that its application leads to an accurate result which rivals that of a rigorous model.
Publication Name: Chemical Engineering Progress
Subject: Engineering and manufacturing industries
ISSN: 0360-7275
Year: 1998
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