Search form

AIChE

Eliminating Difficult Start Ups with State Based Controls

Apr 3, 2012
Dustin Beebe
Some processes are just difficult to start up. Every year, significant production is lost due to start up delays, product quality issues after startup, mistakes or gaps in operator expertise and other reasons. In fact, the U.S. Chemical Safety Board has estimated that the total loss due to operator...

On-Line Energy Management System - Round 2

Apr 3, 2012
Brian Finnegan
In 2008-9 Equistar implemented an on-line, open-loop utility optimizer at one of our world scale olefin sites. We call this our energy management system. While our key project goals were met, we did not realize the full potential of the system. After the system was brought on line, we experienced...

MPC Revamp of Two Naphtha Crackers, Lessons Learned and Relearned

Apr 3, 2012
Vanessa Conz
Braskem is the 8th largest petrochemical company in the world and the biggest producer of polymers in the Americas. The Braskem Triunfo site includes 2 Naphtha Crackers with a combined capacity of 1250 KTA ethylene and 685 KTA propylene. AspenTech DMCplus controllers had been built for both plants...

Practical Process Integration Retrofit Part 5. Software Needs

Apr 3, 2012
G. T. Polley
Practical Process Integration Retrofit Part 5. Software Needs G.T.Polley In this final paper in our series on process integration retrofit we look at what is needed in terms of computer software in order to undertake retrofit projects. Three types of program are identified: Integration analysis...

Application of the Anti-Sloshing Blanket to LNG Carriers and FLNG

Apr 3, 2012
Sangeon Chun
Sloshing is long problematic issue on achieving safety and reliability of LNG carriers and FLNG if the liquid level is below at a certain point in the containment system. Sloshing motion can be significantly reduced by covering the free-surface using a patented floater type blanket which is formed...

Hydrogen Membrane Technology for Ethylene Production

Apr 3, 2012
U (Balu) Balachandran
HYDROGEN TRANSPORT MEMBRANE TECHNOLOGY FOR ETHYLENE PRODUCTION U. (Balu) Balachandran, T. H. Lee, C. Y. Park, and S. E. Dorris Energy Systems Division Argonne National Laboratory Argonne, IL 60439-4838 and Olutoye P. Akinjiola Psage Research, LLC, Macungie, PA 18062 Ethylene, the largest volume...

Practical Process Integration Retrofit Part 3. Path Analysis

Apr 3, 2012
G. T. Polley
Practical Process Integration Retrofit Part 3. Path Analysis G.T.Polley The concept of transferring heat along paths was first suggested by Dhole [1]. It was subsequently investigated by Adiarso [2] and Van Reisen [3,4]. It forms the basis of a technique known as Network Pinch introduced by Zhu...

Cost Effectiveness of 2-Row Membrane System for FLNG

Apr 3, 2012
Herbert Moon
One of the most critical issues in engineering and design of FLNG is to reduce top side weight along with its load distribution to the sub-structure. Concentrated top side loads will result in an increase in hull structure costs. The developed 2-row containment system allows flexibility of top side...

Refining Energy Utilization and CO2 Emissions Modeling

Apr 3, 2012
John J. Marano
The U.S. petroleum refining sector consumes large quantities of energy in order to convert crude oil into transportation fuels and other products. According to the Energy Information Administration, the sector consumed 31% of total U.S. industrial energy in 2006, resulting in significant CO 2...

Carbon Capture Ready Heavy Oil Extraction and Upgrading

Apr 3, 2012
Eloy Flores
Carbon dioxide emissions from heavy oil production are typically higher than that of producing conventional crudes. Ultimately, carbon dioxide emissions can make heavy oil production less competitive if regulated. Carbon dioxide emission regulations will affect the overall economics of heavy oil...

Pages

Subscribe to AIChE