Hydrothermal Solubilization–Hydrolysis–Dehydration of Cellulose to Glucose and 5-Hydroxymethylfurfural Over Solid Acid Carbon Catalysts

Gromov, Nikolay V.; Medvedeva, Тatiana B.; Taran, Oxana P.; Bukhtiyarov, Andrey V.; Aymonier, Cyril; Prosvirin, Igor P.; Parmon, Valentin N.

doi:10.1007/s11244-018-1049-4

Cited by 42 publications

(43 citation statements)

References 75 publications

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“…Based solely on this criterion, the hydrolytic activity of oxidized carbons should be proportionally lower than that of strongly acidic SACs. However, in practice, this is typically not the case: the activity of oxidized carbons is comparable to that of sulfonated carbons ,. On the other hand, one case is known where an activated carbon catalyst (acid group count at 77 % of the sulfonated carbon used in the same study) resulted in the conversion of cellulose that was more or less equal to that in a blank run .…”

Section: Resultsmentioning

confidence: 99%

Electrical Double Layer as a Model of Interaction between Cellulose and Solid Acid Catalysts of Hydrolysis

Tarabanko

Kukhtetskiy

et al. 2019

ChemPhysChem

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Solid acid catalysts of cellulose hydrolysis in aqueous media attract considerable research interest because of the ease of their separation from the reaction products. The nature of interaction between the two solids is a relevant topic of ongoing research. One aspect of behavior of solid acids in water was not previously discussed in literature with regard to hydrolysis of cellulose: electrolytic dissociation and formation of electric double layers. In this work, on theoretical level, we consider the role of the double layer created by the solid acid when cellulose hydrolysis takes place. The diffuse layer of protons is regarded as the medium where the hydrolysis reaction occurs. Protonation of cellulose by these protons imparts positive charge onto its surface, and cellulose is electrostatically attracted to the polyanion of the catalyst. Thus, the two solid surfaces stay close to each other despite Brownian motion; this allows explaining the high activity of solid catalysts even when chemisorption of carbohydrates on a catalyst is not favorable.

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Section: Resultsmentioning

confidence: 99%

Electrical Double Layer as a Model of Interaction between Cellulose and Solid Acid Catalysts of Hydrolysis

Tarabanko

Kukhtetskiy

et al. 2019

ChemPhysChem

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“…A catalytically active autodissociative diffuse layer would be particularly beneficial when acting on a solid substrate since it extends the action of a catalyst outside of the latter's surface, thus excluding problematic direct solid‐to‐solid contact as the prerequisite for the chemical reaction (an example of such solid‐to‐solid catalytic process is the aforementioned cellulose hydrolysis). However, it may also be helpful in reactions with dissolved substrates, particularly if the functional group upon which the catalyst acts is sterically hindered and its interfacing with a solid catalyst surface is thereby complicated .…”

Section: Introductionmentioning

confidence: 99%

Unidimensional Approximation of the Diffuse Electrical Layer in the Inner Volume of Solid Electrolyte Grains in the Absence of Background Ions

Tarabanko

Тaran

2020

ChemPhysChem

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In this paper we continue working on our theory of electrical double layers resulting exclusively from dissociation of a solid electrolyte, which we previously proposed as a medium for catalytic interaction between solid cellulose and solid acid catalysts of hydrolysis. Two theoretical unidimensional models of the inner grain volume are considered: an infinitely long cylindrical pore, and a gel electrolyte near a grain outer surface. Despite the model simplicity, the predictions for the cylindrical pore case are in semi‐quantitative agreement with literature data on electroosmotic experiments, adequately explaining high proton selectivity of sulfonic membranes, and decline of such selectivity at high background acid concentration. The gel model predicts less concentrated diffuse layer in comparison to electrolytes with impenetrable skeleton (e. g., sulfonated carbons). This suggests limited suitability of gel electrolytes as catalysts if a substrate cannot diffuse into the gel bulk and the reaction is thereby spatially limited to the near‐surface region, for example if a substrate is solid like aforementioned cellulose.

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“…Under hydrothermal conditions, starch and saccharine are released into the solution. The dehydration and aromatization would occur, which are similar to the glucose [28,29], resulting in the formation of carbonaceous particles. In order to confirm this, pure starch and maltose were also employed as raw materials.…”

Section: Resultsmentioning

confidence: 99%

Environmentally Friendly and Cost-Effective Synthesis of Carbonaceous Particles for Preparing Hollow SnO2 Nanospheres and their Bifunctional Li-Storage and Gas-Sensing Properties

et al. 2020

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The templated preparation of hollow nanomaterials has received broad attention. However, many templates are expansive, environmentally-harmful, along with involving a complicated preparation process. Herein, we present a cost-effective, environmentally friendly and simple approach for making carbonaceous particles which have been demonstrated as efficient templates for preparing hollow nanospheres. Natural biomass, such as wheat or corn, is used as the source only, and thus other chemicals are not needed. The carbonaceous particles possess abundant hydroxyl and carboxyl groups, enabling them to efficiently adsorb metal ions in solution. The prepared SnO2 hollow spheres were used in a lithium-ion (Li-ion) battery anode, and as the sensing layer of a gas sensor, respectively. After charge–discharge for 200 times at a rate of 1 C, the anodes exhibit a stable capacity of 500 mAh g−1, and a Coulombic efficiency as high as 99%. In addition, the gas sensor based on the SnO2 hollow spheres shows a high sensing performance towards ethanol gas. It is expected that the presented natural biomass-derived particles and their green preparation method will find more applications for broad research fields, including energy-storage and sensors.

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Hydrothermal Solubilization–Hydrolysis–Dehydration of Cellulose to Glucose and 5-Hydroxymethylfurfural Over Solid Acid Carbon Catalysts

Cited by 42 publications

References 75 publications

Electrical Double Layer as a Model of Interaction between Cellulose and Solid Acid Catalysts of Hydrolysis

Electrical Double Layer as a Model of Interaction between Cellulose and Solid Acid Catalysts of Hydrolysis

Unidimensional Approximation of the Diffuse Electrical Layer in the Inner Volume of Solid Electrolyte Grains in the Absence of Background Ions

Environmentally Friendly and Cost-Effective Synthesis of Carbonaceous Particles for Preparing Hollow SnO2 Nanospheres and their Bifunctional Li-Storage and Gas-Sensing Properties

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