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The article discusses troubleshooting for a debutanizer column having hot-vapor bypass pressure control and mentions challenges faced by petroleum refineries due to a flooded condenser and hot-gas bypass column pressure control. Topics discussed include dynamic simulation evaluation of the troublesome hot-gas bypass pressure control, process configuration and analysis methodology, overhead hydraulic analysis and reflux drum internal piping configuration.

The article offers information about a gasification complex overview as well as dynamic simulation base model building. It discusses the gasifier trip upset scenarios and their effect on priority H, product, and other interactions in an integrated environment and offers details about best practices when performing a dynamic simulation study on a similar integrated complex.

The article discusses the use of a dynamic simulation to reduce a design pressure in high-pressure heat exchangers. Topics include the use of the 10/13 rule according to the American Petroleum Institute (API) Standard 521, various factors that affects pressure's transient behavior include the rupture of opening area, relief device capacity, and mass flux and thermodynamics of the fluids, the assumptions for the dynamic approach, and the margin between the pressure peak and design pressure.

The article offers suggestions for analyzing abnormal operations of Hydrodesulfurization (HDS) reactor loops used in a petroleum refinery with dynamic simulation. It mentions two abnormal operating conditions which include heatwave to the reactor effluent equipment and piping caused by the sudden loss of feed, and settle-out pressure in the reactor loop after the loss of recycle gas flow.

A letter to the editor is presented in response to the article "Climate Science" in the November 2015 issue.