Chemical Engineering Practice

Accompanying the ever-increasing performance of polymerization catalysts used to produce polyethylene (PE) is a general increase in catalyst sensitivity to impurities in ethylene feed. These can impact the length and branching of polymer chains as well as interchain bonding, which in turn determine...

The fouling of oil quench tower internals is a recurrent problem for ethylene plants and it is important to monitor the rate of fouling so that mitigating steps can be taken and cleaning of the tower can be planned. The most useful instruments for monitoring the fouling of the OQT are differential...

Hydroprocessing or hydrotreating is the key technology to clean, to refine, and to convert crude oils into valuable products, such as gasoline and diesel. It covers a wide range of feed stocks and numerous configurations. The tutorial will discuss process configuration, material selection, and heat...

The products of petroleum refining must meet tight specifications, including limits on sulfur, nitrogen, olefins, aromatics, and other contaminants. Hydrotreating removes these contaminants from distilled crude oil fractions and intermediate process streams. Hydrocracking converts heavy oil...

The paper will present an overview of the Hydrocracking process as applied in the refineries today. It will cover Mild Hydrocracking, Partial Conversion Hydrocracking, Full Conversion Hydrocracking, Hydrocracker/FCC integration, Hydrocracker/Ethylene Steam Cracker integration and Production of Lube...

Energy efficiency has become an important theme in the process industries, and many companies have implemented sophisticated strategies to improve both the design and the operation of their plants. However, many efficiency improvements are possible simply by doing basic things right. This article...

This paper will give an overview of the current status of jet fuels production from hydrotreating of biooils, including vegetable oils and microalgae oils. Hydrotreating of biooils is different from the conventional hydrotreating process; there are two reasons: 1) Different routes. There are at...

The formation of a flammable vapor cloud following a spill of cryogenic liquids, such as ammonia and LNG (liquefied natural gas), on a ground or water includes significant toxic, fire or explosion hazards. The ability to predict the consequences of such an event is crucial to perform proper risk...

The term “Appropriate Placement” was introduced in Pinch Analysis during the 1980s to indicate how special unit operations should be correctly integrated with the background process to ensure maximum energy savings. Pinch Analysis has provided guidelines for the design of heat exchanger networks as...

Liquefied Natural Gas (LNG) has been a growing energy resource in the U.S., for which significant import and storage infrastructure was developed in the past decade. The infrastructure for liquefaction and export has also been developing as a result of recent shale gas finds in North America. In...