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AIChE Spring Meeting and Global Congress on Process Safety

Ensuring Reliability and Optimum Performance in Antisurge Applications

Mar 21, 2010
Janine Keeley
There are several compressors within an ethylene plant, cracked gas and refrigeration compressors are the major ones. These compressors are high capital cost items. Performance and reliability of these units are especially important. The antisurge control system is designed to protect this asset. A...

Magnetic Bearings in Turboexpander Applications

Mar 21, 2010
Tim Ryan
Magnetic bearings in turboexpander have become the standard for the installation in gas processing and ethylene plants; there are areas of the design that are challenging to the designer for each application. This paper begins with a review of magnetic bearings, the components and how they operate...

Process Gas Compressor Fouling & Washing Mitigation

Mar 21, 2010
Sheri R. Snider
Part A: The ethylene industry has been affected by the economic downturn. Plants have operated at low rates and have fed lighter feeds when possible. In this paper, the impacts of feed rates and types on process gas compressor operation and monitoring are discussed. Part B: Ethylene plant...

On the Solubility of Mercury in Liquid Hydrocarbons

Mar 21, 2010
D. Gallup
The solubility of Hgo was determined in 34 pure hydrocarbons, hydrocarbon mixtures, crude oils, and water from -65oC to +65oC (where each solvent remained liquid). The solubility of HgCl2 was also quantified, but in a limited subset of the solvents. The solubility of any Hg species in its...

Simulating a Typical Atmospheric Crude Distillation Unit Tutorial

Mar 21, 2010
David Myers
Atmospheric Crude Columns are one of the most important pieces of equipment in the petroleum refining industry. Typically located after the Desalter and the Crude Furnace, the Atmospheric Tower serves to distil the crude oil into several different cuts. These include naphtha, kerosene, light diesel...

Real Time Detection of Gaseous Metal Contaminants in Coal Flue and Fuel Gas

Mar 21, 2010
Erik C. Rupp
The Integrated Gasification Combined Cycle (IGCC) is a promising technology for the future use of coal to provide energy. During this process, many of the trace elements present in coal are volatilized, and remain in the gas phase through the gas turbine, only to be released in the flue gas. Trace...

Progression of GHG Emissions Benchmarking

Mar 21, 2010
Claire Cagnolatti
The efforts to measure, regulate, and control the emissions of greenhouse gases (GHG) by the refining and petrochemicals industries have been in effect in varying degrees in several countries and regions around the world. Companies that operate such facilities in regions with pending or active...

CO2 Footprinting in the Chemical Industry

Mar 21, 2010
Russell Heinen
This paper provides a brief global perspective to the GHG issue as it impacts the petrochemical industry and then focuses on the factors of developing carbon footprints for processes and products in the chemical industry. Using results from our recent studies we illustrate the complexities of...

CFD Simulation of Diesel Hydrotreaters Under Periodic Operation Mode

Mar 21, 2010
Middle distillate hydrotreating is the most important refining process for the production of ultra-low-sulfur diesel, in which sulfur content is required to be less than 15 wppm. Hydrotreating is usually conducted in trickle bed hydrotreaters under steady-state operation with constant gas and...

Energy Security and Affordability in the 21st Century

Mar 21, 2010
John Hofmeister
Hofmeister, former President of Shell Oil Company, and founder of the non-profit association, Citizens for Affordable Energy, tackles two of the most critical concerns facing industry today – energy availability and affordability. While green energy is helpful, it's inadequate for the demands of...

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