The stringent quality requirement of petroleum products in highly competitive markets makes on-line controlling of distillation composition essential. In this paper, a novel method using sensitivity matrix analysis and kernel ridge regression to implement on-line estimation of distillation compositions is proposed. In the approach, the sensitivity matrix analysis is presented to select the most...

Ethylene Oxide was first reported in 1859 as being prepared from the reaction of potassium hydroxide on ethylene chlorohydrins. But nowadays it is mainly prepared by direct oxidation of ethylene with oxygen on silver based catalyst. In its final product stream along with ethylene oxide many other impurities like formaldehyde, acetaldehyde, unconverted ethylene, water and other inert gases are a...

Through its ‘Column Targeting Tools’ the Aspen plus simulator performs the ‘Thermal Analysis’ for rigorous column (RadFrac) calculations and produce Column Grand Composite Curves (CGCC) and exergy loss profiles. The CGCC displays the net enthalpies for the actual and ideal operations at each stage, and the cold and hot heat utility requirements, while the exergy loss profiles indicate the level...

This paper considers the design and control of a reactive distillation column in which one reactant is consumed and two products are formed (A B+C). The volatilities are B ¿ A ¿ C , i.e. the reactant is intermediate boiling between the two products. The metathesis of 2-pentene is considered as the demonstrative example. The column has a single feed of the intermediate boiling reactant. The dist...

1 Significance A method is proposed that either returns all solutions to steady-state models of distillation columns or proves infeasibility. No initial estimates are required. The computational effort grows linearly with the number of stages. Successful solution of a numerically challenging reactive distillation column with 7 steady-states show the robustness of the method. The authors do not ...

INTRODUCTION. What is the effect of maldistribution on the mass transfer efficiency of a distillation column containing structured packing?. The column of structured packing is considered to consist of a set of unit cells. Each pair of sheets gives a two-dimensional set of " elementary " cells: