Kinetic investigation of the catalytic conversion of cellobiose to sorbitol

Negahdar, Leila; Oltmanns, Jens Uwe; Palkovits, Stefan; Palkovits, Regina

doi:10.1016/j.apcatb.2013.09.046

Cited by 54 publications

(41 citation statements)

References 38 publications

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“…No inhibition by sorbitol or mannitol was observed. The activation energy of glucose hydrogenation over the Ru catalyst was 55 kJ/mol, which is well consistent with the values of ~60 kJ/mol in other studies [106,108,112]. Besides Ru catalysts, Ni catalysts are also extensively considered for glucose hydrogenation.…”

Section: Reaction Kineticssupporting

confidence: 76%

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Mechanism and Kinetic Analysis of the Hydrogenolysis of Cellulose to Polyols

Wang

Pang

et al. 2016

Green Chemistry and Sustainable Technology

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The catalytic hydrogenolysis of cellulose to polyols represents an attractive process for biomass conversion to value-added products with a high atom economy. In the past decade, extensive studies have been conducted and promptly accumulated a rich knowledge in this field. In this chapter, we focus on the review of reaction mechanisms and kinetics after a brief description of the catalyst development for this process. In view of the different polyol products, the present review is mainly composed of two parts: cellulose conversion to sugar alcohols and cellulose hydrogenolysis to ethylene glycol and 1,2-propylene glycol. The reaction mechanisms are discussed and summarized to obtain general rules in terms of the specific performance of various catalysts. The reaction kinetics of cellulose hydrogenolysis are analyzed on the basis of the kinetics of the individual reaction steps and their correlations in the whole route covering in detail the reactions of cellulose hydrolysis, sugar hydrogenation, retro-aldol condensation, and sugar condensations. Finally, the prospective for the reaction mechanism and kinetics study of cellulose hydrogenolysis is presented.

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Section: Reaction Kineticssupporting

confidence: 76%

“…Negahdar et al conducted a kinetic study of the catalytic conversion of cellobiose to sorbitol by using a binary catalyst of silicotungstic acid and Ru/AC [112]. As shown in Fig.…”

Section: Reaction Kineticsmentioning

confidence: 99%

Mechanism and Kinetic Analysis of the Hydrogenolysis of Cellulose to Polyols

Wang

Pang

et al. 2016

Green Chemistry and Sustainable Technology

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“…However, our previous work on the model compounds di‐ and trisaccharide revealed two competing reaction pathways, namely hydrolysis of oligosaccharides and hydrogenation to a reduced form. Further, at lower reaction temperatures the hydrogenation becomes considerably dominant, which is contrary to the widely accepted premises .…”

Section: Introductioncontrasting

confidence: 59%

Conversion of Polysaccharides to Sugar Alcohols: A Modeling Approach Based on Oligosaccharides

Negahdar

Hausoul

Sibirtsev

et al. 2018

Int J of Chemical Kinetics

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We extend our former kinetic and experimental study of hydrogenolysis of di‐ and trisaccharides using Ru/C in combination with a molecular acid as a catalyst system, to longer oligosaccharides up to heptasaccharide. The extended kinetics, despite the considerably more complex reaction network, reconfirms our previous hypothesis that reactions of oligosaccharides proceed through two competing reaction pathways, namely hydrolysis of oligosaccharides and their hydrogenation to a reduced form. This challenges the widely accepted supposition that conversion of polysaccharides to sorbitol passes consecutively through hydrolysis to monosaccharides followed by hydrogenation to sorbitol. This works also sets forth the hypothesis that hydrogenation of long‐chain oligosaccharides increases the rate of hydrolysis to a considerable extent and presents a significant alternative pathway in sorbitol formation.

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“…23 Previous research has suggested that understanding homogeneous catalyst systems can allow for the design of improved solid catalysts. [28][29][30][31] Our investigations of the roles of each catalyst component revealed that the PWA/CeO 2-x catalyst demonstrates a synergistic ability to convert cellobiose to monosaccharides. CeO 2-x , 0<x≤0.5, is a widely used support material which has previously been used to prepare cerium oxide supported PWA.…”

Section: Introductionmentioning

confidence: 91%

One-pot conversion of cellobiose to mannose using a hybrid phosphotungstic acid–cerium oxide catalyst

et al. 2015

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A hybrid catalyst composed of phosphotungstic acid coated cerium oxide nanoparticles was demonstrated to catalyze the one-pot conversion of cellobiose, the disaccharide unit of cellulose, to a monosaccharide mixture of glucose and mannose. A high % conversion of cellobiose (up to 99%) was achieved resulting in a yield of mannose up to 15.8%. The yield of mannose from a glucose starting material was 22.8%, exceeding those of previous ceriumbased glucose epimerization catalysts. The components of the hybrid material were revealed to function synergistically via a two-step process. Cellobiose was hypothesized to be first hydrolyzed to glucose, which was subsequently epimerized to mannose by the cerium ions leached from the catalyst. The 13 C NMR spectroscopic study suggested that the epimerization likely occurred by the way of a 1,2-carbon shift reaction mechanism.

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Kinetic investigation of the catalytic conversion of cellobiose to sorbitol

Cited by 54 publications

References 38 publications

Mechanism and Kinetic Analysis of the Hydrogenolysis of Cellulose to Polyols

Mechanism and Kinetic Analysis of the Hydrogenolysis of Cellulose to Polyols

Conversion of Polysaccharides to Sugar Alcohols: A Modeling Approach Based on Oligosaccharides

One-pot conversion of cellobiose to mannose using a hybrid phosphotungstic acid–cerium oxide catalyst

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