April 2007

Letters to the Editor

Letters to the Editor

Corrections In the February 2007 article "Optimize your hydrocracking operations," there was an error in Fig. 1. In the figure, the de-metalized oil (DMO) unit was misnamed as the coker. HP apologize..

Corrections In the February 2007 article "Optimize your hydrocracking operations," there was an error in Fig. 1. In the figure, the de-metalized oil (DMO) unit was misnamed as the coker. HP apologizes for any inconvenience this error may have caused. The correct figure is shown here.  Fig. 1    Flow diagram of the Gulf Coast refinery processing operations. Fanning friction factor In response to the article "Analytical calculation of Fanning friction factor" (January 2007, pp. 97–100), there is a Visual Basic program for Excel that is a much simpler method of solving for the

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