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Fossil Fuels

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...

Improved LNG Plant Performance Through Higher Thermodynamic Efficiency

Mar 14, 2011
Christopher M. Ott
For many years, the LNG industry has focused on large baseload plants. Recently, more attention is being given to smaller LNG facility sizes and alternative liquefaction strategies. This presentation will examine the impact that the thermodynamic efficiency of a particular cycle can have on the...

Using a Continuous MPC Algorithm to Control An Unsteady Batch Fermentation Process

Mar 14, 2011
William Stewart
Classical MPC has been leveraged to improve control on a nonlinear unsteady-state system, batch alcohol fermentation. The controller uses a hybrid model with fundamental reaction equations along with empirical process data-based modeling. More than thirty lines of batch quality control have been...

Multi-Model MPC for a Complex pH Neutralization Process

Mar 14, 2011
Weiting Tang
Control of feed pH control is an important task in chemical industries, wastewater treatment, polymerization reactions, fatty acid production and biochemical processes. However, this is a challenging problem due to (i) presence of large and varying time delays and (ii) complex time varying...

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...

Reliable Innovations on Compressors for LNG Value Chain

Mar 14, 2011
Mirco Ermini
Since the restart of its expansion in 1985 with Woodside plant, OEM has tried to support the growth of LNG market all over the years by introducing always-new technologies for both driver and driven equipments. Nowadays, new challenges are emerging from the market, asking the OEM to give its...

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...

New Cooling Application: Total Heat Removal From Base Load LNG Plants

Mar 14, 2011
J. C. Kuo
Most new and existing liquefied natural gas (LNG) plants have used dry air cooler (DAC) technology to reject the total heat required to liquefy natural gas. Only a few others are able to overcome environmental issues such as thermal pollution and water limitations using water cooler (WC) technology...

New Continuous Coking Process

Mar 14, 2011
Douglas W. Sullivan
NEW CONTINUOUS COKING PROCESS A new coking process can accept resid feed from the conventional resid heater in a coking plant and continuously discharge vapor and dry petroleum coke particles. The process promotes a rapid recovery of volatiles from the resid enabling recovery of more volatiles. It...

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...

Handling LPG Components In LNG Plants

Mar 14, 2011
Stanley Huang
Natural Gas Liquid (NGL) recovery is an inherent part of most Liquefied Natural Gas (LNG) production trains. The requirement serves many purposes, such as adjusting the heating value of the product LNG, mitigating the freezing risks caused by specific intermediate and heavy components, and...

Efficient Power Recovery In LNG Regasification Plants

Mar 14, 2011
Hans E. Kimmel
Regasification plants vaporize liquefied natural gas using mainly high-pressure LNG pumps and heat exchangers. The vaporization pressure corresponds to the natural gas pipe line pressure. Due to the large temperature difference between the LNG feed and the pipe line gas, a substantial power...

Predicting Operating Regimes In Heavy Gas Oil Hydrotreating Reactors

Mar 14, 2011
Jinwen Chen
Predicting Operating Regimes in Heavy Gas Oil Hydrotreating Reactors Jinwen Chen and Mugurel Munteanu CanmetENERGY, Natural Resources Canada One Oil Patch Drive, Devon, AB, T9G 1A8, Canada Hydrotreating (HDT) or mild hydrocracking (HDC) of heavy gas oil or vacuum gas oil is an important step in...

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