Kinetic model for the ammoxidation of ethanol to acetonitrile

Tripodi, Antonio; Ripamonti, Davide; Martinazzo, Rocco; Folco, Federico; Tabanelli, Tommaso; Cavani, Fabrizio; Rossetti, Ilenia

doi:10.1016/j.ces.2019.07.015

Cited by 8 publications

(9 citation statements)

References 62 publications

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“…Recently, the ammoxidation of ethanol to ACN has drawn attention due to its high atomic efficiency. 14,26 TiO 2 and ZrO 2 supported vanadium oxide catalysts were tested for this reaction. V 2 O 5 /ZrO 2 showed a complete ethanol and oxygen conversion with a selectivity of 70% and 20% for ACN and CO x , respectively, at 400 °C.…”

Section: Yu-chuan Linmentioning

confidence: 99%

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Light hydrocarbon conversion to acrylonitrile and acetonitrile – a review

Trangwachirachai

Lin

2023

Dalton Trans.

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Section: Yu-chuan Linmentioning

confidence: 99%

“…27 Kinetic parameters were also analyzed. 26 The acidity of vanadium-based catalysts is a major difficulty in ethanol ammoxidation because it leads to a dehydration of ethanol. 28 Disadvantages include a high ammonia-to-feed ratio and the inevitable generation of hazardous HCN, raising concerns about the environmental impact.…”

Section: Yu-chuan Linmentioning

confidence: 99%

Light hydrocarbon conversion to acrylonitrile and acetonitrile – a review

Trangwachirachai

Lin

2023

Dalton Trans.

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“…Acetonitrile is a solvent of major importance for research experiments and for the pharmaceutical industry, − but its separation from water cannot be achieved with one distillation unit, given the formation of an azeotrope, so usually a pressure swing , or an extractive distillation ,− technique is used. This passage is necessary when acetonitrile is produced, because water is a byproduct of the consolidate Sohio process, as well as of the oxidative routes sought by many researchers. − All the more important, it is fundamental for the recovery and reuse of acetonitrile from effluents. ,− …”

Section: Introductionmentioning

confidence: 99%

Solid–Liquid–Liquid Equilibria of the System Water, Acetonitrile, and Ammonium Bicarbonate in Multiphase Reacting Systems

Tripodi

Conte

Robbiano

et al. 2021

Ind. Eng. Chem. Res.

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The salting out of acetonitrile from water in the presence of ammonium bicarbonate was studied at atmospheric pressure from 4 to 35 °C. The coexisting phases were analyzed independently with H1 nuclear magnetic resonance, ion chromatography, calorimetry, and titrations. The binodal region was described with semiempirical functions and with the UNIQUAC thermodynamic model. The critical composition at ambient temperature is given by 0.02 g/g of salt and 0.58 g/g of acetonitrile: at lower salt concentrations; this mixture is widely employed in liquid chromatography, thanks to the buffering properties of the bicarbonate. The separation of acetonitrile and water for extraction purposes, instead, is often obtained with other ammonium salts. These ternary equilibrium data can then be useful to develop extraction and analysis procedures at buffered, mildly alkaline pH. In addition, this mixture can be encountered during the acetonitrile synthesis proposed from bioethanol and bioethylene, so these multiphase equilibria govern the separation and purification of acetonitrile in specific reactors that allow the recovery of ammonium bicarbonate as a valuable byproduct. Furthermore, the solubility of this salt in alcohols and its decomposition were investigated to target its stability in multiphase reactors, extractors, and driers.

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“…4 Antonio Tripodi et al used the Langmuir− Hinshelwood−Hougen−Watson (LHHW) approach to establish an acceptable kinetic model of the catalytic oxidation mechanisms for the ammonia-based oxidation of ethanol to acetonitrile. 5 However, the methods described in these studies create a large number of hydrogen cyanide byproducts.…”

Section: Introductionmentioning

confidence: 99%

“…Folco et al studied the ammoxidation of ethanol to acetonitrile with a vanadium catalyst and analyzed two different support catalysts, V 2 O 5 /ZrO 2 and V 2 O 5 /TiO 2 . Antonio Tripodi et al used the Langmuir–Hinshelwood–Hougen–Watson (LHHW) approach to establish an acceptable kinetic model of the catalytic oxidation mechanisms for the ammonia-based oxidation of ethanol to acetonitrile . However, the methods described in these studies create a large number of hydrogen cyanide byproducts.…”

Section: Introductionmentioning

confidence: 99%

Process Design and Comprehensive Analysis of the Ethanol Amination Process to Improve Acetonitrile Production

Yang

Wang

et al. 2020

Ind. Eng. Chem. Res.

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Acetonitrile is an important and widely used organic solvent, but its production is limited by its production process. In this study, a new process for the amination of ethanol to acetonitrile was developed. On the basis of the reaction kinetics, the operating conditions of reaction temperature and raw material ratio were optimized. Comprehensive economic, thermodynamic, and environmental analyses were used to improve the production performance and energy utilization. Thermodynamic analysis of the acetonitrile production process shows that the separation and purification unit and product refining unit make the most critical contributions to exergy loss. The introduction of heat integration technology can effectively recover process energy and reduce the energy consumption of the whole process. On the basis of the highest product yield, the total annual cost was 6.34 × 106 $/year. The exergy efficiency of the amination process to convert ethanol to acetonitrile was 56%, which could be thermodynamically improved. Environmental analysis showed that the reaction synthesis unit had a greater environmental effect than the other two studied units. A new method combining process simulation, economics, thermodynamics, and environmental performance analysis is proposed to improve the energy efficiency and quality of the acetonitrile production process.

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Kinetic model for the ammoxidation of ethanol to acetonitrile

Cited by 8 publications

References 62 publications

Light hydrocarbon conversion to acrylonitrile and acetonitrile – a review

Light hydrocarbon conversion to acrylonitrile and acetonitrile – a review

Solid–Liquid–Liquid Equilibria of the System Water, Acetonitrile, and Ammonium Bicarbonate in Multiphase Reacting Systems

Process Design and Comprehensive Analysis of the Ethanol Amination Process to Improve Acetonitrile Production

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