Thesis (M.Eng.)--Chulalongkorn University, 1994

A dynamic compartmental model for multicomponent distillation based on the reduced order technique is applied to a selected actual column, the Debutanizer of Bangchack Petroleum Industry. In the compartmental method, the dynamic behavior of the column is obtained after the dynamic simulation has been identified with the aid of computer software. A design case of the column, Debutanizer, is used as an initial condition. The present application results, ±15% step changes in feed flow rate, shows that the dynamic responses for bottom, top, and each intermediate stages have an accuracy, not higher than 17% deviation, against a full-order mode, which has been calculated by the existing steady state program (PRO II), at the same conditions. Furthermore, the comparison of the compartment's selection, four-and five-compartment, are also given a different of 3%