Real time optimization with multivariable control is required to maximize profits

On‐line parameter estimation in a high‐pressure low‐density polyethylene tubular reactor

“…Conclusively, the LDPE tubular reactor presents itself as a role model candidate for the application of an on-line optimization scheme. In the chemical engineering literature, the problem of the on-line optimization of the operation of a process has been motivated either by a change in the optimization objective, or by a change in the process characteristics (Cutler and Perry, 1983;Schuler and Schmidt, 1992). The on-line optimization level of a process operational scheme lies between the scheduling and the regulatory control problem, and its goal is to estimate within the framework of the process functioning determined at the scheduling level, the optimal operating policy to be carried out by the regulatory level controllers (Kiparissides and Ponnuswamy, 1981).…”

Modifier-Adaptation Methodology for Real-Time Optimization

“…The main reason for such success is that RTO can provide significant economic payoffs. For a high capacity plant, even a 1% improvement in yield can lead to significant annual savings [21]. RTO is targeted at reducing costs and improving profitability while taking into account security, quality, environmental and equipment constraints.…”

Startup strategy design and safeguarding of industrial adiabatic tubular reactor systems

“…Steady-state and dynamic operation optimization of production facilities is one of the major challenges for the chemical industry to strengthen profitability. Steady-state process optimization is reported to contribute roughly 3-5% to the profit margin of continuously operated chemical plants (Cutler and Perry, 1983;Baily et al, 1993;Krist et al, 1994). Dynamic simulation and optimization of process operations is a fairly new activity, but is at least of the same economic importance to the chemical industry.…”