Per-Olof Eriksson Scandinaviska Raffinaderi AB Lysekil, Sweden Aric Tomlins Icotron Houston Sachindra Kumar Dash Icotron Phoenix Scandinaviska Raffineri AB (Scanraff) fully commissioned a computer-based control system on the fluid catalytic cracking unit (FCCU) at its Lysekil, Sweden, refinery in March 1991. The project incorporated a number of advanced control applications covering the entire unit. The application of advanced control resulted in a unit throughput increase, conversion control, optimum product yield distribution from fractionation, excellent product quality control, and reduced operator intera...

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