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Conference Presentations - 2012 AIChE Spring Meeting and Global Congress on Process Safety

Reducing CO2 Emissions From Refineries Through Chemistry Upgrade

Apr 3, 2012
Michelle Valenzuela
Despite the lack of a global greenhouse gas emission reduction agreement, regional schemes are moving forward to limit CO 2 and other GHG emissions to the atmosphere. In the United States, the state of California is moving forward with regulations that will cap emissions from installations...

Practical Process Integration Retrofit Part 1. Cross-Pinch Method

Apr 3, 2012
G. T. Polley
Practical Process Integration Retrofit Part 1. Cross-Pinch Method G.T.Polley A number of techniques have been developed to aid the process engineer retrofit heat recovery networks. The first of these methods was called the ?Cross-Pinch Method? (Tjoe & Linnhoff [1986]) and whilst it is widely...

Absorption Refrigeration for Auxiliary Applications in LNG Plant

Apr 3, 2012
Jordan Belue
ABSORPTION REFRIGERATION FOR AUXILIARY APPLICATIONS IN LNG PLANT Jordan Belue a , Robert Havlik b , Stanley Huang a , a: Chevron Energy Technology Company, Houston, Texas b: Tengizchevoil, LLP. ABSTRACT A Liquefied Natural Gas (LNG) plant demands a large amount of mechanical power for generating...

Practical Process Integration Retrofit Part 4. Handling Large Projects

Apr 3, 2012
G. T. Polley
Practical Process Integration Retrofit Part 4. Dealing with Large Projects G.T.Polley The Cross-Pinch Method is suitable for use in identify retrofits when the number of streams is small (the example used in the demonstration of this method had seven streams, Polley [2011]). However, Pinch...

Dissolved Oxygen Content Measurement in Aqueous and Hydrocarbon Liquids

Apr 3, 2012
Feridoun Fahiminia
Dissolved oxygen in aqueous and organic liquids affects a variety of process operations. Even at trace levels, it can lead to fouling in processing units such as separators, heat exchangers, pumps, compressors, and reactors, causing unplanned shutdowns. It can also promote corrosion in processing...

Re-Rating Ethylene Plant Equipment for Optimum Results

Apr 2, 2012
Daniel Renard
Rerating of turbomachinery equipment installed in ethylene plants is a well established method of improving plant operation, whether it is capacity changes, feedstock flexibility, power reduction or combination of all three. By utilizing modern compressor and steam turbine component technology,...

Installing a Charge Gas Compressor Booster

Apr 2, 2012
Giorgio Franceschetti
The Braskem Ethylene Southeast Plant expansion study from 500 MTA to 700 MTA recommended that the charge gas compressor turbine and the 1 st and 2 nd stages should be replaced. Due to a series of technical and logistical constraints, was decided to install a booster compressor upstream the first...

Applying Offline Tools to Reduce On-Site Control Implementation Effort

Apr 2, 2012
Kenneth V. Allsford
Process control engineers are continuously challenged to reduce the effort to commission new advanced regulatory control strategies and/or linear/nonlinear multivariable control applications. Reducing on-site controller identification and tuning and the associated "interference" with process...

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