Reactive Distillation Research Papers - Academia.edu (original) (raw)

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  • Mechanical Engineering, Chemical Engineering, Mass Transfer, Chemical Kinetics
• • by Eugeny Kenig
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  • Chemical Engineering, Thermodynamics, Modeling, Heat and Mass Transfer
• • by imran rahman
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  • Chemical Engineering, Analytical Chemistry, Separation, Reactive Distillation
• • by Galen Suppes
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  • Chemical Engineering, Reactive Distillation
• • by Domingos Barbosa
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  • Mechanical Engineering, Chemical Engineering, Design, Reactive Distillation
• • by Eugeny Kenig
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  • Engineering, Modeling and Simulation, Reactive Distillation, CHEMICAL SCIENCES
• • by R Manurung
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  • Chemical Engineering, Reactive Distillation
• • by Johan Grievink
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  • Mechanical Engineering, Chemical Engineering, Reactive Distillation, Design method

Catalytic reactive distillation offers new opportunities for manufacturing fatty acid esters, involved both in biodiesel and specialty chemicals. A key problem is the effective water removal in view of protecting the solid catalyst and... more

Catalytic reactive distillation offers new opportunities for manufacturing fatty acid esters, involved both in biodiesel and specialty chemicals. A key problem is the effective water removal in view of protecting the solid catalyst and avoiding costly recovery of the alcohol excess. This work proposes a novel approach based on dual esterification of fatty acid with light and heavy alcohols, namely methanol and 2-ethylhexanol. These two complementary reactants have an equivalent reactive function but synergistic thermodynamic features. The setup behaves rather as reactive absorption combined with reactive azeotropic distillation with heavy alcohol as co-reactant and water-separation agent. Another element of originality is the control of the inventory of alcohols by fixing the reflux of heavy alcohol and the light alcohol column inflow. This strategy allows achieving both stoichiometric reactant feed rate and large flexibility in ester production. The distillation column for recovering light alcohol from water is not longer necessary. The result is a compact, efficient and easy-to-control multi-product reactive setup.

• • by Costin Sorin Bildea
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  • Mechanical Engineering, Chemical Engineering, Thermodynamics, Biodiesel
• • by Mariana Aguirre
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  • Mechanical Engineering, Chemical Engineering, Thermodynamics, Reactive Distillation
• • by dong jin suh
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  • Chemical Engineering, Kinetics, Weak interaction, Reactive Distillation
• • by Oliver Bailer
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  • Engineering, Fluid Dynamics, Heterogeneous Catalysis, Reactive Distillation
• • by Rajamani Krishna
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  • Mechanical Engineering, Chemical Engineering, Reactive Distillation, Distillation columns
• • by S.A. NIJHUIS
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  • Engineering, Reactive Distillation, Computer Simulation, CHEMICAL SCIENCES
• • by S. Crossley and +1
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  • Mechanical Engineering, Chemical Engineering, Theoretical Computer Science, Reactive Distillation
• • by Salvador Hernandez
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  • Chemical Engineering, Design, Modeling, Reactive Distillation
• • by Rey-Anne Paynter
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  • Chemical Engineering, Design, Reactive Distillation, Simulation
• • by Oliver Bailer
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  • Mechanical Engineering, Chemical Engineering, Production, Kinetics
• • by Jiri Hanika and +1
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  • Mechanical Engineering, Chemical Engineering, Reactive Distillation, Simulation
• • by Eugeny Kenig
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  • Chemical Engineering, Reactive Distillation, Scaling up, Ethyl Acetate
• • by Eugeny Kenig
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  • Chemical Engineering, Reactive Distillation, Simulation Tool

A hybrid reactive distillation system with high selectivity pervaporation was examined to produce butyl acetate and methanol via transesterification of methyl acetate with butanol. High selectivity pervaporation was combined with reactive... more

A hybrid reactive distillation system with high selectivity pervaporation was examined to produce butyl acetate and methanol via transesterification of methyl acetate with butanol. High selectivity pervaporation was combined with reactive distillation to eliminate a hitherto required column for the separation of a methanol and methyl acetate azeotrope. The polyamide-6 membrane was used for this purpose because of its high selectivity for methanol while also allowing sufficient permeate flux. The high purity methyl acetate recovered in the retentate stream leads to high conversion in the reactive distillation column, which enhances the energy savings (up to 71%) of this process. The feasibility of the proposed hybrid processes and several alternative designs were evaluated by rigorous simulation and optimization using the Aspen Plus software package. The effects of several designs and operating variables were also investigated for the proposed design. The high potential of the hybrid reactive distillation and pervaporation system for butyl acetate production is very promising; it may not only reduce the total annual costs relative to conventional systems but may also provide an attractive strategy to address problems associated with methanol and methyl acetate azeotropes in the effluent generated in the polyvinyl alcohol industry.

• • by Gregorius Harvianto
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  • Chemical Engineering, Membrane Technology, Membrane Separation Technology, Reactive Distillation
• • by Andrzej Górak
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  • Chemical Engineering, Reactive Distillation, Scaling up, Pressure Drop

The challenges in the chemical processing industry today are environmental concerns, energy and capital costs. Catalytic distillation (CD) is a green reactor technology which combines a catalytic reaction and separation via distillation... more

The challenges in the chemical processing industry today are environmental concerns, energy and capital costs. Catalytic distillation (CD) is a green reactor technology which combines a catalytic reaction and separation via distillation in the same distillation column. Utilization of CD in chemical process development could result in capital and energy savings, and the reduction of greenhouse gases. The efficacy of CD and the economic merits, in terms of energy and equipment savings, brought by CD for the production of biodiesel from waste oil such as yellow grease is quantified. Process flow sheets for industrial routes for an annual production of 10 million gallon ASTM purity biodiesel in a conventional process (reactor followed by distillation) and CD configurations are modeled in Aspen Plus. Material and energy flows, as well as sized unit operation blocks, are used to conduct an economic assessment of each process. Total capital investment, total operating and utility costs are calculated for each process. The waste oil feedstock is yellow grease containing both triglyceride and free fatty acid. Both transesterification and esterification reactions are considered in the process simulations. Results show a significant advantage of CD compared to a conventional biodiesel processes due to the reduction of distillation columns, waste streams and greenhouse gas emissions. The significant savings in capital and energy costs together with the reduction of greenhouse gases demonstrate that process intensification via CD is a feasible and new green process for the biodiesel production from waste oils.

• • by Aashish Gaurav
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  • Reactive transport modeling, Reactive Distillation, Process Intensification, Green Process and Production Methods
• • by Rajamani Krishna
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  • Chemical Engineering, Mass Transfer, Reactive Distillation, Pressure Drop
• • by James Riggs
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  • Mechanical Engineering, Applied Mathematics, Nonlinear Programming, Finite Element
• • by Eckhard Ströfer
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  • Mechanical Engineering, Chemical Engineering, Reactive Distillation, Process Design

The combination of reactive distillation and a divided wall column leads to a reactive divided wall column. The first use of such a reactive divided wall column for the hydrolysis of methyl acetate is presented here. For the development... more

The combination of reactive distillation and a divided wall column leads to a reactive divided wall column. The first use of such a reactive divided wall column for the hydrolysis of methyl acetate is presented here. For the development of this system, kinetic data for the involved reactions was determined at the University of Stuttgart, mini plant experiments were performed

• • by Sanchez Sander
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  • Chemical Engineering, Chemistry, Reactive Distillation, Chemical Engineering Design
• • by Romualdo Salcedo
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  • Mechanical Engineering, Chemical Engineering, Design, Production
• • by Rajamani Krishna
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  • Mechanical Engineering, Chemical Engineering, Mass Transfer, Reactive Distillation
• • by Arthur Westerberg
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  • Chemical Engineering, Reactive Distillation
• • by Andrzej Górak
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  • Mechanical Engineering, Chemical Engineering, Thermodynamics, Modeling and Simulation
• • by Sigurd Skogestad and +1
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  • Mechanical Engineering, Chemical Engineering, Optimal Control, Reactive Distillation

The design optimization of reactive distillation columns (RDC) is characterized by complex nonlinear constraints, nonlinear cost functions, and the presence of many local optima. The standard approach is to use MINLP solvers that work on... more

The design optimization of reactive distillation columns (RDC) is characterized by complex nonlinear constraints, nonlinear cost functions, and the presence of many local optima. The standard approach is to use MINLP solvers that work on a superstructure formulation where structural decisions are represented by discrete variables and lead to an exponential increase in the computational effort. The mathematical programming (MP)

• • by S. Engell
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  • Mechanical Engineering, Chemical Engineering, Mathematical Programming, Engineering Design

Biodiesel is a clean burning fuel derived from a renewable feedstock such as vegetable oil or animal fat. It is biodegradable, non-inflammable, non-toxic, and produces lesser carbon monoxide, sulfur dioxide, and unburned hydrocarbons than... more

Biodiesel is a clean burning fuel derived from a renewable feedstock such as vegetable oil or animal fat. It is biodegradable, non-inflammable, non-toxic, and produces lesser carbon monoxide, sulfur dioxide, and unburned hydrocarbons than petroleum-based fuel. The purpose of the present work is to present an efficient process using reactive distillation columns applied to biodiesel production. Reactive distillation is the simultaneous implementation of reaction and separation within a single unit of column. Nowadays, it is appropriately called “Intensified Process”. This combined operation is especially suited for the chemical reaction limited by equilibrium constraints, since one or more of the products of the reaction are continuously separated from the reactants. This work presents the biodiesel production from soybean oil and bioethanol by reactive distillation. Different variables affect the conventional biodiesel production process such as: catalyst concentration, reaction temperature, level of agitation, ethanol/soybean oil molar ratio, reaction time, and raw material type. In this study, the experimental design was used to optimize the following process variables: the catalyst concentration (from 0.5 wt.% to 1.5 wt.%), the ethanol/soybean oil molar ratio (from 3:1 to 9:1). The reactive column reflux rate was 83 ml/min, and the reaction time was 6 min.

• • by Carlos Santander
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  • Technology, Chromatography, Catalysis, Experimental Design

This paper presents a novel hybrid process combining thermally coupled reactive distillation with membrane-based pervaporation for enhanced production of n-butyl acetate. A conventional reactive distillation process was used as the base... more

This paper presents a novel hybrid process combining thermally coupled reactive distillation with membrane-based pervaporation for enhanced production of n-butyl acetate. A conventional reactive distillation process was used as the base case and first optimized for the transesterification of methyl acetate with n-butanol to produce n-butyl acetate. It was observed that methyl acetate recovered in the recycle stream significantly affects the con-version in the reactive distillation column and overall energy efficiency of the whole process. The existing and proposed configurations were evaluated and optimized by simulation in Aspen Plus. The integration of thermally coupled reactive distillation and pervaporation improved the energy efficiency of the reactive distillation process by preventing remixing effect in the reactive distillation column and eliminating the azeotropic nature of the methanol and methyl acetate in the recycle stream, respectively. Finally, integration of the thermally coupled reactive distillation with a commercial pervaporation membrane was explored to take synergistic advantage of the thermally coupled reactive distillation and pervaporation hybrid configuration. As a result, the proposed hybrid design showed remark-ably improved energy efficiency and economics. The total reboiler duty and total annual cost reduced to 63 and 43%, respectively, compared to those of the base case.

• • by Gregorius Harvianto
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  • Chemical Engineering, Membrane Science, Process Optimization, Process Modeling and Simulation
• • by Roel Prins
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  • Engineering, Reactive Distillation, Silica, CHEMICAL SCIENCES
• • by Xavier Joulia
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  • Chemical Engineering, Reactive Distillation, Process Design, Process Synthesis

Biodiesel fuel represents an interesting alternative as a clean and renewable substitute of fossil fuels. A typical biodiesel production process involves the use of a catalyst, which implies high energy consumptions for the separation of... more

Biodiesel fuel represents an interesting alternative as a clean and renewable substitute of fossil fuels. A typical biodiesel production process involves the use of a catalyst, which implies high energy consumptions for the separation of the catalyst and the by-products of the reaction, including those of undesirable side reactions (such as the saponification reaction). A recently proposed process involves the use of short-chain alcohols at supercritical conditions, avoiding the use of a catalyst and the occurrence of the saponification reaction. This process requires fewer pieces of equipment than the conventional one, but its high energy requirements and the need of special materials that support the reaction conditions makes the main product, biodiesel fuel, more expensive than petroleum diesel. In this work, a modification of the supercritical process for the production of biodiesel fuel is proposed. Two alternatives are proposed. The process involves the use of either reactive distillation or thermally coupled reactive distillation. Simulations have been carried out by using the Aspen One™ process simulator to demonstrate the feasibility of such alternatives to produce biodiesel with methanol at high pressure conditions. A design method for the thermally coupled system is also proposed. Both systems have been tested and the results indicate favorable energy performance when compared to the original scheme. Furthermore, the thermally coupled system shows lower energy consumptions than the reactive distillation column.

• • by Salvador Hernandez
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  • Chemical Engineering, High Pressure, Energy Consumption, Feasibility Study
• • by Uwe Kruger
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  • Mechanical Engineering, Applied Mathematics, Control Engineering, Principal Component Analysis
• • by Senthil Kumar
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  • Chemical Engineering, Mass Transfer, Heat Transfer, Reactive Distillation
• • by Nitin Kaistha
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  • Mechanical Engineering, Chemical Engineering, Design, Controller Design
• • by vincent GERBAUD
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  • Chemical Engineering, Reactive Distillation, Design method, Energy Balance
• • by Shubham Sharma
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  • Materials Engineering, Kinetics, Modeling, Comparative Study

The separation of 2-Methoxyethanol-toluene azeotropic mixture has high practical significance in both industry and the laboratory because of their multipurpose solvating properties. However, both 2ME and toluene have adverse effects on... more

The separation of 2-Methoxyethanol-toluene azeotropic mixture has high practical significance in both industry and the laboratory because of their multipurpose solvating properties. However, both 2ME and toluene have adverse effects on human and animal health; therefore, researchers have become interested in their separation. A significant amount of 2-methoxyethanol-toluene forming a minimum-boiling azeotrope is discharged by the electrochemical industry. The presence of this azeotrope renders separation a challenging task. Separation techniques, namely pressure swing distillation (PSD) and azeotropic distillation (AD), have not yet been explored. In this study, these separation techniques are evaluated economically and dynamically using a wellknown commercial simulator Aspen Plus®. This study includes the development of process schematics for these alternative separation processes and economic analysis involving total annual cost (TAC) calculations. It is concluded that the heat-integrated PSD technique leads to 21.35% savings in TAC compared to previously reported techniques. Furthermore, a decentralized plant-wide control structure for a suitable separation technique is also developed and tested for ±10% throughput manipulations in fresh feed flow rate and ±5% disturbances in feed composition. This study will significantly help the process engineers overcome the challenges of handling the electrochemical industry's hazardous effluent in environmentally and economically ways.

• • by Dr. Abdul-Sattar Nizami
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  • Engineering, Electrical Engineering, Chemical Engineering, Civil Engineering
• • by Iqbal Mujtaba
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  • Chemical Engineering, Reactive Distillation, Batch Distillation, Process Model
• • by Basudeb Saha
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  • Materials Engineering, Heterogeneous Catalysis, Reactive Distillation, Functional Reactive Programming
• • by Eugeny Kenig
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  • Engineering, Mass Transfer, Reactive Distillation, Process Simulation
• • by Salvador Hernandez
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  • Chemical Engineering, Energy Consumption, Reactive Distillation, Singular value decomposition
• • by S. Engell
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  • Chemical Engineering, Chemistry, Control, Controller Design