Kinetic study of glucose conversion to levulinic acid over Fe/HY zeolite catalyst

Ramli, Nur Aainaa Syahirah; Amin, Nor Aishah Saidina

doi:10.1016/j.cej.2015.07.044

Cited by 115 publications

(63 citation statements)

References 49 publications

(101 reference statements)

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“…54 In pure water, there exist a number of energetically favorable side reactions such as condensation to humin precursors, and dehydration of glucose to HMF is more thermodynamically difficult. Amin et al 55 proposed a kinetic model for glucose dehydration, which is divided into four steps: (i) Dehydration of glucose to produce HMF; (ii) Glucose dehydration to humins (byproduct); (iii) HMF rehydration to form LA; (iv) byproducts generated from HMF aggregates. In this way, the activation energies of the first formation of the enediol intermediate, which is further driven towards fructose and then HMF.…”

Section: Dehydration Of Glucose Catalyzed By Brønsted Acids In Watermentioning

confidence: 99%

Catalytic dehydration of hexose sugars to 5‐hydroxymethylfural

Zou

Zhu

Wang

et al. 2018

Biofuels Bioprod Bioref

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The catalytic conversion of cellulosic biomass to downstream products provides a viable solution to alleviate the energy crisis and global warming. This article provides a relatively comprehensive review of the dehydration of glucose (the monomer of cellulose) and fructose considering various catalyst and solvent systems. Biphasic solvents and heterogeneous systems are recommended from the point of view of industrial applications. A two‐step catalytic conversion of glucose via fructose has been envisaged: first, isomerization of glucose to fructose, which has been extensively discussed in this review, and then transformation of fructose to downstream products. Two‐step tandem catalytic reactions from glucose to downstream products (i.e., one‐pot synthesis via fructose) are also attractive for industrial applications and should be given more attention. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd

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Section: Dehydration Of Glucose Catalyzed By Brønsted Acids In Watermentioning

confidence: 99%

Catalytic dehydration of hexose sugars to 5‐hydroxymethylfural

Zou

Zhu

Wang

et al. 2018

Biofuels Bioprod Bioref

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“…This chemical reaction and its kinetics have been extensively studied recently. [51][52][53][54][55] Ther eaction mechanism is reported to consist of two major steps:c onversion of hexoses into HMFa nd the conversion of HMF into levulinic and formica cid. [56] Ther eactionm echanism for the conversion from hexoseinto HMF has received special attention because HMF itself is considered ab uildingb lock with potential in several applicationsi nt he fuel and polymer industry.…”

Section: La Production Processesmentioning

confidence: 99%

Making Levulinic Acid and Ethyl Levulinate Economically Viable: A Worldwide Technoeconomic and Environmental Assessment of Possible Routes

et al. 2017

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Ethyl levulinate is a diesel additive that has received special attention recently due to its potential for production in large quantities from inexpensive feedstocks. Several processes have been developed for the conversion of biomass into levulinic acid and ethyl levulinate, and an economic analysis of these routes would indicate the main hindering factors of their commercialization. This Review focuses on filling this gap in current knowledge by gathering data from scientific papers and patents to create a simulation to analyze processes by focusing on the production of ethyl levulinate in nine countries or regions across the globe. The key indicator to analyze the economic feasibility of ethyl levulinate production is a comparison of its minimum selling price to the local wholesale price of diesel on an energy basis. Processes simulated in Brazil, China, and India presented promising results with feedstocks such as sugarcane bagasse and rice residues. Also, the integration of ethyl levulinate production into existing ethanol plants is a factor that may improve process economics. Overall, this Review specifies key factors in economic and environmental performances of the processes to indicate research topics that could achieve high impact on industrial‐scale processes once matured.

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“…The temperature dependency of the reaction kinetics could be described as the Arrhenius law:

k_{e} = k_{e}^{0} \exp true(\frac{- E_{A, e}}{R T} true)

where E A,e is the reaction activation energy, k e 0 is the pre‐exponential factor, and R is the gas constant (8.314 J/(mol · K)).…”

Section: Resultsmentioning

confidence: 99%

Kinetics of the esterification between lactic acid and isoamyl alcohol in the presence of silica gel‐supported sodium hydrogen sulphate

Jiang

Zeng

et al. 2018

Can J Chem Eng

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The esterification reaction between isoamyl alcohol and lactic acid was studied over silica gel-supported sodium hydrogen sulphate (NaHSO 4 Á Silica). The influences of the external mass transfer, internal mass transfer, reaction temperature, catalyst loading, and initial reactant molar ratio were investigated. Kinetic experimental data of this esterification reaction obtained at different temperatures (343-378 K) were correlated with three models (the pseudo-homogeneous (PH), Eley-Rideal (ER), and Langmuir-Hinshelwood (LH) model). The UNIFAC method was employed to estimate the activity coefficients when the non-ideal thermodynamic behaviour of the reaction mixture was considered. The results show that the ER model is more appropriate for predicting the dynamic data of an esterification reaction. It was found that water and isoamyl alcohol were more strongly adsorbed onto the surface of NaHSO 4 Á Silica than lactic acid and isoamyl lactate, by comparing the adsorption equilibrium constants of different components existing in the reaction. The activation energy and standard enthalpy of the reaction were found to be 54.1 and À6.27 kJ mol À1 , respectively.

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Kinetic study of glucose conversion to levulinic acid over Fe/HY zeolite catalyst

Cited by 115 publications

References 49 publications

Catalytic dehydration of hexose sugars to 5‐hydroxymethylfural

Catalytic dehydration of hexose sugars to 5‐hydroxymethylfural

Making Levulinic Acid and Ethyl Levulinate Economically Viable: A Worldwide Technoeconomic and Environmental Assessment of Possible Routes

Kinetics of the esterification between lactic acid and isoamyl alcohol in the presence of silica gel‐supported sodium hydrogen sulphate

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