Chemical Engineering Practice

Turnaround Excellence is more than a state of being… it is a journey. Achieving and sustaining excellence is wholly dependent on a site approach of shared accountability towards Turnaround Excellence and must be a continually improving process. Starting well in advance of “feed out”, a long range...

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...

Optimizing the clearing and cleaning of process units during turnarounds. Primary discussion involves the three key areas related to an effective, timely cleaning plan. Chemistry, planning and execution. Minimization of effluent is also addressed. Overall timeliness, from oil out to vessel entry,...

PT Badak NGL utilizes groundwater for Plants and Community water consumption. Demineralization water production in PT Badak NGL uses ion exchange process which has high safety risk since it utilizes sulfuric acid and caustic for ion exchanger regeneration. The sulfuric acid sometimes leaks out from...

Hydroprocessing or hydrotreating is the key technology to clean, to refine, and to convert crude oils into valuable products, such as gasoline and diesel. It covers a wide range of feed stocks and numerous configurations. The tutorial will discuss process configuration, material selection, and heat...

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...

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...

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...

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...

This paper will give an overview of the current status of jet fuels production from hydrotreating of biooils, including vegetable oils and microalgae oils. Hydrotreating of biooils is different from the conventional hydrotreating process; there are two reasons: 1) Different routes. There are at...