Reactive distillation column design for controllability: A case study

Kumar, M. V. Pavan; Kaistha, Nitin

doi:10.1016/j.cep.2008.07.004

Cited by 20 publications

(12 citation statements)

References 36 publications

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“…The impact of steady-state multiplicity on the performance of decentralized control structures for this system was demonstrated by Kumar and Kaistha [26]. It has been used as a control test-bed problem by several researchers [17,[26][27][28][29]. Its endothermic counterpart, on the other hand, has received much less attention in the open literature.…”

Section: Introductionmentioning

confidence: 96%

Control of Quaternary Ideal Endothermic Reactive Distillation with and without Internal Heat Integration

2016

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Decentralized control system design is evaluated for a basic and an internally heat-integrated generic, ideal, double-feed, two-product reactive distillation system. The internally heat-integrated reactive distillation column (HiRDC) is obtained via catalyst redistribution into the rectifying zone and feed tray relocation. For basic regulatory control, three two-point control structures with a fixed reflux rate or a fixed reflux ratio operation policy are synthesized and evaluated for their closed-loop disturbance rejection characteristics using rigorous dynamic simulations. To eliminate the purity offsets for on-target product purities, product purity composition controllers manipulating the reflux ratio and stripping tray temperature set point are implemented. Reactive tray section composition control is necessary for on-target product purity operation of HiRDC.

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Section: Introductionmentioning

confidence: 96%

Control of Quaternary Ideal Endothermic Reactive Distillation with and without Internal Heat Integration

2016

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“…As a typical process intensification technology, RD has gained significant attention recently. [1][2][3][4][5][6][7][8][9][10][11][12] It is typically operated in two modes: excess reactant feed (twocolumn process) and neat operation (single-column process). Luyben [13] quantitatively compared the steadystate economics and the dynamic controllability of two alternative RD systems, and the results show that the single-column process has better steady-state economics, while the two-column process exhibits adequate dynamic controllability.…”

Section: Introductionmentioning

confidence: 99%

Rigorous design and control of thermally integrated pressure‐swing reactive distillation process for isobutyl acetate production considering the effect of column pressures

Zhang

Liu

et al. 2020

Can J Chem Eng

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By studying the effect of pressure on relative volatility, azeotrope composition, and net reaction rate, a rigorous pressure-swing thermally integrated reactive distillation (PST-RD) process for isobutyl acetate synthesis is proposed. The steady-state and dynamic characteristics of the PST-RD process are evaluated based on Aspen and Aspen Dynamic. Steady-state optimization results show that the energy consumption and the total annual cost (TAC) reduced by 42.32% and 34.20% compared with the conventional two-column process, respectively. Subsequently, two control structures of the PST-RD process under a rigorous model are developed and evaluated by large disturbances in throughput and feed composition. Dynamic simulation results show that peak dynamic transients can be effectively reduced by adding a Q/F feedforward control structure. Furthermore, the effective heat integration of high-pressure (HP) and low-pressure (LP) columns can be realized by implementing composition/pressure cascade control when the capacity of the LP column increases.

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“…At present, in current domestic and foreign industrial production, the main method to synthesize EA and BA is through esterification. Reactive distillation (RD) has extensively been considered as a more sustainable and energy‐ and cost‐efficient process, largely because of its promise for reversible reactive systems, in which chemical equilibrium limits conversion . The RD process scheme for the production of esters may vary significantly, depending on the reactive system and the properties of mixtures .…”

Section: Introductionmentioning

confidence: 99%

Coproduction of Ethyl Acetate and n‐Butyl Acetate by Using a Reactive Dividing‐Wall Column

Xie

Peng

et al. 2018

Chem Eng & Technol

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The performance of the reactive distillation dividing-wall column for coproduction of ethyl acetate and butyl acetate was experimentally studied. n-Butanol and ethanol are raw reaction materials that react with acetic acid in the reaction zone to produce n-butyl acetate and ethyl acetate, respectively. n-Butyl acetate is not only a product, but also acts to remove water generated by the esterification reactions. The effects of various parameters, such as catalyst loading per stage, reflux ratio, liquid split and molar feed ratios, ethyl acetate/n-butyl acetate purity, pressure drop, and total energy consumption, are investigated. Results show that ethanol could be completely converted and the products could be easily separated, which shows great industrial application potential in the coproduction of ethyl acetate and n-butyl acetate.

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Reactive distillation column design for controllability: A case study

Cited by 20 publications

References 36 publications

Control of Quaternary Ideal Endothermic Reactive Distillation with and without Internal Heat Integration

Control of Quaternary Ideal Endothermic Reactive Distillation with and without Internal Heat Integration

Rigorous design and control of thermally integrated pressure‐swing reactive distillation process for isobutyl acetate production considering the effect of column pressures

Coproduction of Ethyl Acetate and n‐Butyl Acetate by Using a Reactive Dividing‐Wall Column

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