July 2000

Environment

Optimize sulfur recovery operations with advanced controls

By installing a feedfoward control system, an operating facility met tighter limits on SO2 emissions on the SRU

Guillemois, A., Chevron Chemical Co.; Rossati, F., Le Gaz Integral

Sulfur recovery units (SRUs) are widely used in the oil and gas industry; they handle feeds with minor variations in flow and composition. However, adapting this process to treat highly variable feeds was successfully implemented at Chevron Chemical's Gonfreville production site. It has been operating successfully since 1993. Fig. 1. The Chevron Chemical SRU at Gonfreville, France. As part of a plant expansion, Chevron had to build a new SRU to meet new, tighter environmental limits. Variable process streams and sulfur concentrations of feeds were an ongoing challenge to design a new plant or find a process to solve t

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