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Showing 1 to 20 of 56 for “"furfural"”.
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Furfural and the Treatment of Experimental Histoplasmosis
Histoplasmosis was described over 50 years ago by S. T. Darling while he was a pathologist at Ancon (now Gorgas) Hospital in the Panama Canal Zone (20). During 1905-1906 three patients had entered the hospital terminally ill, constantly febrile, coughing, vomiting and suffering from diarrhea. …
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Techno-economic analysis of furfural derivatives in integrated sugarcane biorefineries
… greenhouse gas (GHG) assessments of five furfural-derived products: tetrahydrofuran (THF), 2-methyltetrahydrofuran (MTHF), maleic anhydride (MAH), 2,5-dimethylfuran (DMF), and gamma-valerolactone (GVL) from sugarcane. Conventional second-generation (2G) routes, based on furfural production …
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A study of the quantitative formation of furfural from d-lyxose
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1939.
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Catalytic Production of Furfural by the Subcritical Hydrothermal Gasification of Flax Straw
… without the necessity of the drying step. Furfural is an important chemical that has many industrial applications, and as such, was considered to be the major desired product through the hydrothermal gasification of flax straw using a solid acid catalyst. This study focused on the catalytic …
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Síntese, análise e caracterização do filme polimérico da eletrorredução do furfural sobre platina em acetonitrila
… a partir da eletrooxidação e eletrorredução do furfural. O filme foi crescido sobre a superfície do eletrodo usando-se três técnicas eletroquímicas: voltametria cíclica (VC); a cronoamperometria e a cronopotenciometria. Estas técnicas foram usadas em ambos os processos. Inicialmente foi testada …
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Experimental and DFT study on selective oxidation of 5-Hydroxymethyl furfural over cadmium sulfide catalyst
… fossil fuels. Oxidation of 5-hydroximethyl furfural (HMF) is considered one of the most important biomass conversions, which resulted into value added 2,5-diformylfuran (DFF), 2,5-furandicarboxylic acid (FDCA), 5-hydroxymethyl-2-furancarboxylic acid (HMFCA), and 5-formyl-2-furancarboxylic …
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Humane Alkoholdehydrogenasen und Aldehyddehydrogenasen : Bedeutung für den Metabolismus von Methylpyrenderivaten und von 5-(Hydroxymethyl)-2-furfural
… Rauchen). Ähnliches gilt für 5-(Hydroxymethyl)-2-furfural (HMF), einem Pyrolyseprodukt reduzierender Zucker, dem gegenüber Menschen in recht hohen Mengen exponiert sind. Auch bei HMF steht der ADH- und ALDH-vermittelte oxidative Metabolismus in Konkurrenz zu einer Aktivierung durch …
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Modified ldh-supported au catalystssynthesis, characterization and catalytic performances in furfural liquid phase oxidation and hydrogenation
This thesis focuses on the valorization of furfural, a biomass-derived compound, via oxidation and hydrogenation reactions. Thus, for the mentioned transformations in the previous sentence, gold-modified LDH-based catalysts were prepared: MgAlZr-LDH for oxidation and NiAlZr- LDH for hydrogenation. …
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Avaliação de resinas de troca iônica para o tratamento de hidrolisado hemicelulósico de bagaço de cana-de-açúcar
… a sua capacidade em adsorver ácido acético, furfural e hidróximetil furfural presentes no hidrolisado hemicelulósico de bagaço de cana-de-áçúcar obtido por hidrólise ácida. A metodologia empregada consistiu em determinar, inicialmente, as curvas cinéticas de adsorção para cada um destes …
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The ultra-selective hydrogenation of Furfural on PtCu supported bimetallic nanoparticles and on Pt(111) under ultra-high vacuum
The selective transformation of furfural, a biomass platform molecule, was studied on Pt based heterogeneous catalysts and model single crystal surfaces. Hydrogenation reactions were carried out at pressures ranging from ultra-high vacuum to 20 bar. Temperature Programmed Desorption data in …
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The production of a plastic form sulfate lignin
… was condensed with a mixture of formaldehyde and furfural. The amount of formaldehyde remained fixed at ½ mol whereas ½ mol, 1 mol, and 1½ mols of furfural were used. A molded sample that had been condensed with a mixture of ½ mol of formaldehyde and 1 mol of furfural had the highest relative …
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Sais silicotungstatos de cobalto e ácido túngstico como catalisadores em reações de acetalização do furfural e oxidação de álcoois terpênicos
… de química fina, fármacos e fragrâncias. Já o furfural é uma importante molécula-plataforma derivada de biomassa usada na síntese de solventes, bioaditivos e biocombustíveis. Neste trabalho, o objetivo foi desenvolver catalisadores ativos e seletivos para reações de conversão destes substratos …
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Separation and purification of the resins in tallol
… a waste product of the paper industry. The furfural-water and furfural-petroleum ether methods were investigated. In the first method, a 5% solution of water in furfural by weight was used as a polar solvent with solvent to tallol ratios of 1-1, 2-1, and 3-1 by weight and attempting to …
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Solvent extraction of lubricating oils
… stock out of midcontinent oil was subjected to furfural refining in a one-inch in nominal diameter pyrex glass spray column using various ratios of furfural to oil. The oil was passed in tiny drops through the 9.75 feet high column countercurrent to the furfural flow which was down through the …
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Switchable butadiene sulfone pretreatment of lignocellulosic biomass
… to pretreat the solids after the production of furfural from sugarcane bagasse. These furfural residues are rich in glucan, but mostly used as boiler fuel at a commercial-scale. Alternatively, a furfural-based biochemical conversion approach was proposed, consisting in the pretreatment of the …
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Understanding the Kinetics and Mechanisms of the Desired and Undesired Reactions during Electrochemical Hydrogenation and Hydrogenolysis of Furfural on Copper in Acidic Media
… of chemical processes with renewable energy. Furfural is a biomass derived species that has been identified as a platform molecule. Electrochemical processes are more easily coupled with renewable electricity and can be used to valorize biomass derived species such as furfural. The …
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Utilization of Biomass Derived Furans in Value-Added Organics and Heterogeneous Oxorhenium Catalysts for Deoxydehydration of Diols
… liquefaction, hydrothermal treatment, etc.). Furfural is one particular chemical that can be obtained from lignocellulosic biomass in good yields through the dehydration of sugar residues. It can be used as a feedstock for chemicals such as furan and THF, or as a platform molecule for making …
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