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Showing 1 to 20 of 21 for “"Hydroxymethylfurfural"”.
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Electrochemical oxidation and reduction of 5-hydroxymethylfurfural in alkaline water electrolyzers
… sustainable biomass molecules such as 5-Hydroxymethylfurfural (HMF) can drastically reduce the overall cell potential. Thus, the energy consumption of electrolyzers, while providing valuable products, expands the potential of electrolyzers for the future. For this reason, in addition to …
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Microwave-Assisted Conversion of Sucrose into 5-Hydroxymethylfurfural over Acidic Nanoporous Materials
… be hydrolyzed into biofuel precursors such as 5-hydroxymethylfurfural (HMF). However, due to the poor solubility of cellulose and its robust crystalline structure, current methods available to degrade cellulose into these biofuel precursors are costly, result in low yields along with a large …
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The use of isothermal membrane distillation in tomato processing
… browning reactions such as the formation of hydroxymethylfurfural (HMF) can occur. IMD is a low temperature membrane process used for the concentration of heat sensitive pharmaceutical products. Its use in the food commenced with the concentration of grape juice for winemaking. Although IMD …
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Lactose Polymerization to Polylactose: Furthering Our Understanding for Commercialization
… and Ambersep and diatomaceous earth reduced the hydroxymethylfurfural (HMF) content to a level that was lower than the maximum level determined by the Joint FAO/WHO Expert Committee on Food Additives HMF limit in polydextrose, while increasing the fiber content and decreasing the citric acid …
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Synthesis of a renewable sourced thermotropic polyester with 2,5-furandicarboxylic acid
… based on FDCA. Fructose was converted to 5-hydroxymethylfurfural, which was then used to synthesize the FDCA monomer. A polycondensation reaction involving 4-hydroxybenzoic acid, hydroquinone, and FDCA was subsequently carried out to produce a random mesogenic polyester. ATR-FTIR …
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Engineering polymeric hollow fiber membrane reactors for sustainable chemical transformation reactions
… tandem reaction of glucose and fructose to 5-hydroxymethylfurfural, and nitrophenol reduction reactions”--Abstract, page iv.
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The physicochemical and antioxidant properties of double-boiled kelulut honey
… samples remain unchanged with no formation of hydroxymethylfurfural (HMF) was observed. A preliminary four-week storage study showed that double boiling treatment improves physicochemical properties of Kelulut honey as compared to the untreated samples for all three types of Kelulut honey …
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Catalytic biomass conversion and upgrading into platform chemicals and liquid fuels
… on depleting fossil fuels. Towards this goal, 5-hydroxymethylfurfural (HMF), the dehydration product from C6 (poly)sugars, has been intensively investigated as it has been identified as a versatile C6 intermediate or platform for value-added chemicals and biofuels. This work has developed several …
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The determination of drug stability by HPLC assay of degradation products.
… have not been identified. The oxidation of 5-hydroxymethylfurfural is also examined to determine the usefulness of product analysis in limit testing and in establishing reaction pathways. In all cases where product identity is known, it is shown that the initial rate method employing product …
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An Integrated Process for Catalytical Conversion of Simple Sugars into Platform Chemicals, HMF and FDCA: Catalysis, Continuous Flow Reactor Design, Valorization of Waste By-Product
… in advancing sustainable chemical production. 5-Hydroxymethylfurfural (HMF) and 2,5-furandicarboxylic acid (FDCA) are particularly valuable due to their potential as renewable substitutes for petroleum-derived chemicals. Efficient catalytic processes for converting glucose and fructose into these …
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Quality improvement of manuka honey through the application of high pressure processing
… 0.05). High pressure processing can also control hydroxymethylfurfural (HMF) concentration in honey during process within the standard limit, 16.93 to 18.76 mg/kg (which is below than the maximum allowed limit of 40 mg/kg). This work also reveals that high pressure processing can enhance …
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Compounds Released from Biomass Deconstruction: Understanding Their Effect on Cellulose Enzyme Hydrolysis and Their Biological Activity
… in the prehydrolyzates included xylose, glucose, hydroxymethylfurfural (HMF), furfural, acetic acid, formic acid, and phenolic compounds at concentration ranging from 0 to 21.4 g/L. Pretreatment conditions significantly affected the concentrations of compounds detected in prehydrolyzates. When …
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Hydrothermal and ionothermal carbon structures
… of sugars in addition to the chemistry of hydroxymethylfurfural, mechanistic considerations of the formation of hydrothermal carbon are proposed. On the base of these reaction schemes, the mineral borax, is introduced as an additive for the hydrothermal carbonisation of glucose. It was …
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Catalytic and Biological Applications of Benzoxaborolones
… the conversion of biomass-derived sugars to 5-hydroxymethylfurfural. Building on previously reported metal-promoted processes, I found that 2-carboxyphenylboronic acid (2-CPBA) is an optimal catalyst for this process which can promote the desired reaction without the addition of metals and is …
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Implementing Solvothermally Synthesized Carbon Nanodots into Dye-Sensitized Solar Cells to Enhance External Quantum Efficiency in the Ultraviolet
… conversion process, the production of 5 Hydroxymethylfurfural (5-HMF), is suspected by many researchers to form CNDs via aldol condensation. Despite the hydrothermal synthesis method being a facile method for 5-HMF production and condensation to form CNDs, it remains inefficient and …
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Kinetics of Conversion of Dihydroxyacetone to Methylglyoxal in Honey
… the concentration of MGO. The level of 5-hydroxymethylfurfural (HMF, a potentially toxic compound) must stay below 40 mg/kg if the honey is to be exported. Formation of HMF is predominately dependent on time and temperature. Therefore there is a trade off between storing honey to maximise …
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Innovative Methods for Biomass Sugars Utilization
… observed with glucose during its dehydration to hydroxymethylfurfural (HMF). However, when glucose is first isomerized to fructose, HMF yield is much improved. Thus, isomerizing xylose to xylulose may result in similar improvements to furfural yield. For both of these examples, the key for the …
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Physicochemical and aroma characterization of Arbutus pavarii honey
… the international standards, except for hydroxymethylfurfural (HMF) content of the two older samples which is justified by aging or possible thermal processing of these honeys. Pollen study revealed that melissopalynological analysis is not a reliable method and may not be useful to …
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Techno-economic analysis of furfural derivatives in integrated sugarcane biorefineries
… A-molasses into intermediates such as 5-hydroxymethylfurfural (HMF), levulinic acid (LA), and 1,4-butanediol (1,4-BDO). Process simulations were developed to generate mass and energy balances, which were used to estimate the capital and operating expenses of each biorefinery. The minimum …
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