Design and Control of Reactive Distillation System for Esterification of Levulinic Acid and <i>n</i>-Butanol

Chung, Yi‐Chang; Peng, Tao‐Chun; Lee, Hao‐Yeh; Chen, Cheng-Liang; Chien, I‐Lung

doi:10.1021/ie500660h

Cited by 38 publications

(18 citation statements)

References 24 publications

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“…However, the scheme their reported had a major deficiency which was its inability to control the composition to a set-point. Chung et al (2015) addressed design and control of reactive distillation process for esterification of levulinic acid and nbutanol. They performed sensitivities of some design variables such as feed ratio of raw materials and operating pressure for economic production of n-butyl levulinate.…”

Section: Introductionmentioning

confidence: 99%

Systematic integrated process design and control of reactive distillation processes involving multi-elements

Mansouri

Sales‐Cruz

Huusom

et al. 2016

Chemical Engineering Research and Design

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In this work, integrated process design and control of reactive distillation processes that involve multiple elements (more than two) is addressed through a computer-aided hierarchical decomposition-based framework. Multiple elements are encountered for reactive systems when four or more compounds (including inert compounds) are encountered. The reactive distillation design methods and tools which are similar in concept to design of binary non-reactive distillations and binary reactive distillations are used for design of multi-element reactive distillation processes, such as driving force approach. The methods that are used in this work are based on equivalent binary element concept. This concept provides the representation of a multi-element system in terms of two key elements, light key and heavy key elements. First, the reactive distillation column is designed using the equivalent binary element driving force approach. Next, through analytical, steady-state and closed-loop dynamic analysis it is verified that the control structure, disturbance rejection and energy requirement of the reactive distillation column is better than any other operation point that is not at the maximum driving force. Furthermore, it is shown that the design at the maximum driving force can be both controlled using simple controllers such as PI as well as advanced controllers such as MPC.

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Section: Introductionmentioning

confidence: 99%

Systematic integrated process design and control of reactive distillation processes involving multi-elements

Mansouri

Sales‐Cruz

Huusom

et al. 2016

Chemical Engineering Research and Design

View full text Add to dashboard Cite

show abstract

“…For ETBE production, Sneesby et al 48 explored the interactions between design and control, while Bernal et al 49 considered phenomena such as column hydrodynamics and pressure drop across the column together with a rigorous dynamic model for simultaneous design and control. Chung et al 50 studied the design and control of a RD process for esterification of levulinic acid and n ‐butanol. However, work on integrated design‐control using MPC has scarcely been reported.…”

Section: Introductionmentioning

confidence: 99%

Integrated design and control of reactive distillation processes using the driving force approach

et al. 2021

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Superior controllability of reactive distillation (RD) systems, designed at the maximum driving force (design-control solution) is demonstrated in this article. Binary or multielement single or double feed RD systems are considered. Reactive phase equilibrium data, needed for driving force analysis and design of the RD system, is generated through an in-house property prediction tool. Rigorous steady-state simulation is carried out in ASPEN plus in order to verify that the predefined design targets and dynamics are met. A multiobjective performance function is employed to evaluate the performance of the RD system in terms of energy consumption, sustainability metrics (total CO 2 footprint), and control performance. Controllability of the designed system is evaluated using indices like the relative gain array (RGA) and Niederlinski index (N I ), to evaluate the degree of loop interaction, as well as through dynamic simulations using proportional-integral (PI) controllers and model predictive controllers (MPC). The design-control of the RD systems corresponding to other alternative designs that do not take advantage of the maximum driving force is also investigated. The analysis shows that the RD designs at the maximum driving force exhibit enhanced controllability and lower carbon footprint than the alternative RD designs.

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“…Levulinates can be synthesized by the esterification of pure LA with a simple equilibrium reaction, requiring a mild acid catalysis/reaction conditions, and generally affording very high yields towards the desired ester products. Both the reduced number of process units and the enhanced performances of new technological solutions, such as the reactive distillation, should allow significant improvements in the economics of the esterification process [10][11][12]. However, despite these ascertained potentials, the catalysis issue can be further improved, taking into account both the synthetic strategy and the adopted feedstock.…”

Section: Introductionmentioning

confidence: 99%

One-Pot Alcoholysis of the Lignocellulosic Eucalyptus nitens Biomass to n-Butyl Levulinate, a Valuable Additive for Diesel Motor Fuel

et al. 2020

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The present investigation represents a concrete example of complete valorization of Eucalyptus nitens biomass, in the framework of the circular economy. Autohydrolyzed-delignified Eucalyptus nitens was employed as a cheap cellulose-rich feedstock in the direct alcoholysis to n-butyl levulinate, adopting n-butanol as green reagent/reaction medium, very dilute sulfuric acid as a homogeneous catalyst, and different heating systems. The effect of the main reaction parameters to give n-butyl levulinate was investigated to check the feasibility of this reaction and identify the coarse ranges of the main operating variables of greater relevance. High n-butyl levulinate molar yields (35–40 mol%) were achieved under microwave and traditional heating, even using a very high biomass loading (20 wt%), an eligible aspect from the perspective of the high gravity approach. The possibility of reprocessing the reaction mixture deriving from the optimized experiment by the addition of fresh biomass was evaluated, achieving the maximum n-butyl levulinate concentration of about 85 g/L after only one microwave reprocessing of the mother liquor, the highest value hitherto reported starting from real biomass. The alcoholysis reaction was further optimized by Response Surface Methodology, setting a Face-Centered Central Composite Design, which was experimentally validated at the optimal operating conditions for the n-butyl levulinate production. Finally, a preliminary study of diesel engine performances and emissions for a model mixture with analogous composition to that produced from the butanolysis reaction was performed, confirming its potential application as an additive for diesel fuel, without separation of each component.

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Design and Control of Reactive Distillation System for Esterification of Levulinic Acid and n-Butanol

Cited by 38 publications

References 24 publications

Systematic integrated process design and control of reactive distillation processes involving multi-elements

Systematic integrated process design and control of reactive distillation processes involving multi-elements

Integrated design and control of reactive distillation processes using the driving force approach

One-Pot Alcoholysis of the Lignocellulosic Eucalyptus nitens Biomass to n-Butyl Levulinate, a Valuable Additive for Diesel Motor Fuel

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