Chemical Engineering Practice

WASTE HEAT RECOVERY CONSIDERATIONS IN LNG PLANTS ABSTRACT DOUGLAS WILES, RYAN HOLLENBACH & STANLEY KWAN Thermal integration in an LNG plant improves its overall thermal efficiency. Thermally integrated plants tend to have lower operating costs and reduced environmental emissions including, CO,...

Mono and poly-nitrated aromatic compounds are used to make products in a variety of industries. The reactions that produce them are often highly exothermic and present a very high risk of thermal runaway. Recent work has shown that nitrobenzene can form 3 phase systems with concentrated sulfuric...

While most studies on flares have been done with single hydrocarbon fuels or binary mixtures, the reality of most industrial flares is that they see different mixtures of many gases. Over the past 5 years the International Flare Consortium (IFC) has been conducting research on just this issue. In a...

When evaluating the safety and environmental aspects in olefins facility one must surely consider the flare. The flare is responsible for combusting enormous amounts of flammable material during plant upsets. Not only is the flare responsible for combusting these materials but it also must perform...

Optimal control of refrigeration compressors is important during each phase of ethylene operations; startup, steady state, and shutdown. At steady state, optimal control of the refrigeration compressors can help maximize production rates and minimize horsepower. During startup and shutdown, optimal...

Advanced Process Control Strategies for Process Fired Heaters Fired Heaters are used extensively throughout refineries for heating, vaporization and thermal cracking of various process fluids. These heaters are essential for refinery operation. The main objectives for fired heater optimization are...

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...

Process Engineers have a strong inclination for qualitative and quantitative analysis of process streams. On-Line process gas analyzers are a fundamental requirement for control, optimization and energy efficiency but have a stigma with end users and maintenance managers, sometimes well earned. On-...

This presentation illustrates the need and solution for operators viewing and making changes to set points and outputs in context. It shows the penalty and risks of operators shifting focus to faceplates and performing other window management tasks when trying to operate an industrial process. In-...

The chemistry of refinery fouling is well enough understood to mitigate nearly all fouling. The key information required are the location of the foulant, elemental analysis of the foulant, and identification of precursors in the oil flowing through the fouled unit. Most organic fouling is caused by...