Experimental studies of a consecutive—competitive reaction in steady state and forced periodic CSTRs

Abstract

Experimental studies of diethyl adipate saponification in a CSTR show that forced cycling of feed composition produces significant yield increases in intermediate product relative to the optimal steady state operation, while forced temperature cycling has much less effect. Related experiments provide useful transient heat transfer data for this system. Reaction kinetics have been determined in water and in a 5070 (v/v) isopropanol solvent.onsecutive-competitive reactions are of great in-

Periodic forcing of the CSTR: An Application of the generalized II‐criterion

“…Experiments and simulation studies verify that it is often advantageous to exploit the nonlinear behavior of chemical reactions and operate in a transient regime by periodic cycling of one or more control parameters. Dun and Gulari (1985), Wilson and Rinker (1982), and Lee et al, (1980) discuss a range of experimental results supporting this claim. One physical explanation for the phenomenon was given by Cutlip (1979), who periodically switched the feed in the isothermal oxidation of carbon monoxide.…”

Periodic operation of catalytic reactors—introduction and overview

“…High thermal inertia makes wall temperature difficult to modulate for cycle periods that affect performance. This input variable, therefore, has had only limited study [20] 1970 As above Flow Selectivity Wandrey and Renken [21 ] 1973 ' Hydrocarbons oxidation (propene, cyclohexene ) Concentration Product distribution Renken et al [22] 1974 EtOH dehydration to diethyl ether Concentration Selectivity Helmrich et al [23] 1974 Ethylene hydrogenation Concentration Rate Baiker and Richarz [ 24] 1976 As above Concentration Rate Renken et al [25] 1976 Ethylene oxidation Concentration Selectivity Dautzenberg et al [26] 1977 Fischer-Tropsch synthesis Concentration Product distribution Briggs et al [27] 1977-80 SO2 oxidation Concentration Rate Leupold and Renken [ 28 ] 1977 Ethyl acetate from ethylene and acetic acid Concentration Rate AI- Taie and Kershenbanm [ 291 1978 Butadiene hydrogenation Concentration Selectivity Bilimoria and Bailey [ 30] 1978 Acetylene hydrogenation Concentration Selectivity Crone and Renken [ 31 ] 1979 Styrene polymerization Concentration Rate, product distribution Cutlip [ 32 ] 1979 CO oxidation Concentration Rate Abdul-Kareem et al [33] 1980 As above Concentration Rate Lee et al [ 34 ] 1980 Saponification of diethyl adipate Concentration Selectivity Silveston and Hudgins [ 35 ] 1981 SO2 oxidation Concentration Rate Jain et al [ 15,36] 1982-83 NH3 synthesis Concentration Rate Wilson and Rinker [ 37 ] 1982 NH3 synthesis Concentration Rate Adesina et al [38] 1984 Fischer-Tropsch synthesis Concentration Rate EI-Masry [ 39] 1985 Claus reaction Concentration Rate Nappi et al [40] 1985 Low-pressure methanol Concentration rate M/iller-Erlwein and Guba [ 41 ] 1988 Methacrolein from IBA Concentration Selectivity Haure et al [2] 1989 SO2 oxidation in tfickel bed Flow Rate Saleh-Alhamed et al [42] 1992 ._co_J , ....…”

Operability Analysis and Design of a Reverse-Flow Microreactor for Hydrogen Generation via Methane Partial Oxidation

“…However, enormous opportunities exist to improve the performance of the reactors and other process systems using periodic control, as illustrated by several experiments. [1][2][3] A number of theoretical studies on the advantages of periodic operation have been performed as well, such as the Hamilton-Jacobi theory, [4][5][6] vibrational control, 7,8 and frequency domain approaches. 9,10 In the 1980s, the field emerged as forced unsteady state operation (FUSO).…”

“…Conventional chemical processes are run in a steady-state mode of operation. However, enormous opportunities exist to improve the performance of the reactors and other process systems using periodic control, as illustrated by several experiments. − A number of theoretical studies on the advantages of periodic operation have been performed as well, such as the Hamilton−Jacobi theory, − vibrational control, , and frequency domain approaches. , In the 1980s, the field emerged as forced unsteady state operation (FUSO). The significant interest in FUSO is largely attributed to the Novosibirsk group of Matros. , This era represents a shift from approaches based on periodic control or optimization theory to those based on analysis of chemical kinetics and reactor dynamics.…”