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Conference Presentations - 2011 AIChE Spring Meeting and Global Congress on Process Safety

Reducing the Load on Cooling Towers through Revamping of Individual Coolers

Mar 14, 2011
Graham T. Polley
The engineering of cooling water systems involves a consideration of both hydraulic and thermal behaviour. Unfortunately this is often ignored. For instance when engineers seek to reduce the thermal load on cooling towers they will often opt for increased heat recovery (via improved heat...

Glid ARC Plasma Conversion of Pyrolysis Gas Into Syngas

Mar 14, 2011
Fela Odeyemi
Pyrolysis gas is a product of Biomass, Municipal Wastes or Coal gasification process that contains H2, CO as well as unreacted light hydrocarbons and heavy hydrocarbons such as tar. These undesired hydrocarbons diminish Pyrogas fuel value thereby making significant removal of the unwanted...

Life Cycle of Aluminum Plate Fin Exchangers

Mar 14, 2011
Dr. Hubert Koepf
Abstract: Corrosion, blockage, fouling, and mechanical/thermal overload are the key degradation mechanisms that operators need to control to avoid premature failure of their aluminum plate fin heat exchangers. The paper will describe these degradation mechanisms as well as how to incorporate finite...

Helium Extraction From Nitrogen Rejection Unit Stream of LNG Plants

Mar 14, 2011
Chen-Hwa Chiu
Helium is a major rare gas that has a lot industrial and research application. Potential production has traditionally come from natural gas and the helium market is becoming tighter as the production is not being kept up with the demand. Helium extraction and refining from the NRU (nitrogen...

Chemical Insights Indicate Process Opportunities for Residue Processing

Mar 14, 2011
Murray R. Gray
The vacuum residue fraction of petroleum is one of the most complex mixtures of compounds known, one which continues to defy comprehensive analysis. The combination of complexity, diversity, and aggregation of the asphaltenes has enormous implications for upgrading reactions and phase behaviour...

Exploitation of Low-Grade Heat In Site Utility Systems

Mar 14, 2011
Ankur Kapil
The site utility system provides the heating, cooling load along with power production for the processes on the total site. Low-grade heat is available in large amount across the process industry from temperatures of 30 o C to 250 o C as gases (e.g. flue gas) and/or liquids (e.g. cooling water)...

Secondary Effects of Reducing Carbon Dioxide Emissions

Mar 14, 2011
Eloy Flores III
Secondary Effects of Reducing Carbon Dioxide Emissions While climate change has lost some interest to the global economy, the United States and the World continue to move forward on advancing research and technologies to capture, sequester, or reuse the green house gas carbon dioxide. Capturing...

Steam Utility Systems Are Not "Business as Usual" for Chemical Process Simulators

Mar 14, 2011
Jonathan Currie
The operating costs of a typical refinery utility system are so significant that small operational improvements can result in large annual savings. This paper introduces a new utility modelling package designed for PETRONAS to allow in-house modelling and optimization of their refinery and...

The Role of Heat Exchangers In Post-Combustion CO2 Capture

Mar 14, 2011
Warren H. Ziegler
The role of heat exchangers in post-combustion CO2 capture Warren Ziegler Motivation: The overall energy penalty for post-combustion carbon capture by aqueous amines as well as solid sorbent systems can be reduced significantly by recovering heat from the lean/hot solvents coming out of the...

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