Chemical Engineering Practice

A contributor to complex/large project management difficulty is uncertainty gaps – gaps between the information required and that readily available within the project organization. Moreover, for large projects, information is generally spread among many professional personnel across multiple...

The Dow Hydrocarbons Business has a thorough process for managing excellent EHS performance during Turnarounds. We name an EHS Focal Point for each Turnaround 2 years in advance. A Turnaround EHS Preparation and Execution plan is developed and followed. An EHS Readiness Assessment is conducted with...

A history of NOx in the Ethylene Industry will be presented.

An Engineering Approach to the Synthesis of Integrated Distillation Schemes for Systems Involving Difficult Separations D. Jantes Jaramillo, G.T. Polley Dept. of Chemical Engineering, University of Guanajuato, Mexico The separations of iso-pentane and n-pentane and of iso-butane and n-butane are...

Abstract Integration of the Rayleigh Equation for batch distillation in closed analytical form has heretofore required that relative volatility (α) be assumed constant. A new technique presented in this paper produces a continuous analytical function for the Rayleigh Equation integral whether α is...

A new separation technology, called stripping crystallization (SC) or distillative freezing (DF), has been recently developed in our laboratory to separate the mixtures with close boiling temperatures, including the mixed xylenes [1-3] and the benzene/cyclohexane mixture [4]. In principle, SC is...

Hydrogen management can have a significant effect on refinery utility supply through the integration with the rest of the systems. Optimization of hydrogen production in conjunction with steam, power, and fuels can yield significant savings opportunities for the refinery. Examples of actual...

Heat recovery on Total Site level can provide a considerably high potential for energy saving. It offers additional degrees of freedom for heat recovery and cogeneration. A key issue in Total Site heat recovery is to select the minimum allowed temperature difference (ΔT min ) specifications on a...

The term “Appropriate Placement” was introduced in Pinch Analysis during the 1980s to indicate how special unit operations should be correctly integrated with the background process to ensure maximum energy savings. Pinch Analysis has provided guidelines for the design of heat exchanger networks as...

The federal safety standards for LNG facilities under 49 CFR Part 193 approves the use of specific dispersion models for performing vapor-gas dispersion exclusion zones. In addition, provisions allow for the use of alternative models if approved by PHMSA. In 2010, PHMSA, in consultation with FERC,...