Hydrogenolysis
Mostrando 1-12 de 36 artigos, teses e dissertações.
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1. COVID-19: Um Novo Desafio para a Cardiopatia na Gravidez
This work presents the results obtained for the gas chromatography-mass spectrometry (GC-MS) monitoring of the liquid-phase hydrodeoxygenation (HDO) reaction of furfural (FFR) to 2-methylfuran (MF) over a bifunctional Ru/RuOx/C catalyst in the presence of a direct source of H2. Hydrogenation and hydrogenolysis reactions of FFR and of the intermediate furfury
Arq. Bras. Cardiol.. Publicado em: 2020-07
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2. Furfural Hydrodeoxygenation over a Ruthenium-Based Bifunctional Catalyst in the Presence of a Direct Source of H2
This work presents the results obtained for the gas chromatography-mass spectrometry (GC-MS) monitoring of the liquid-phase hydrodeoxygenation (HDO) reaction of furfural (FFR) to 2-methylfuran (MF) over a bifunctional Ru/RuOx/C catalyst in the presence of a direct source of H2. Hydrogenation and hydrogenolysis reactions of FFR and of the intermediate furfury
J. Braz. Chem. Soc.. Publicado em: 2020-07
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3. SELECTIVE HYDROGENOLYSIS OF GLYCEROL TO PROPYLENE GLYCOL IN A CONTINUOUS FLOW TRICKLE BED REACTOR USING COPPER CHROMITE AND Cu/Al2O3 CATALYSTS
The glycerol hydrogenolysis reaction was performed in a continuous flow trickle bed reactor using a water glycerol feed and both copper chromite and Cu/Al2O3 catalysts. The commercial copper chromite had a higher activity than the laboratory prepared Cu/Al2O3 and was used for most of the tests. Propylene glycol was the main product with both catalysts, aceto
Quím. Nova. Publicado em: 2017-05
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4. Iridium Catalysts for C-C and C-O Hydrogenolysis: Catalytic Consequences of Iridium Sites
The support effect on the properties of iridium catalysts for C-C and C-O hydrogenolysis was investigated. Cyclohexane conversion and glycerol hydrogenolysis were used to compare the behavior of iridium catalysts in terms of C-C and C-O cleavage. The nature of the support influenced the catalyst performance in both cyclohexane conversion and glycerol hydroge
J. Braz. Chem. Soc.. Publicado em: 2016-05
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5. Catalizadores de cobre soportado parareducción selectiva de glicerol
ABSTRACTThe biodiesel industry has brought with it an oversupply of glycerol, which is the byproduct of the process, generating a fall in its price. The transformation of glycerol into value-added compounds interest as it would improve the overall economic balance of biofuel production enabling environmentally sustainable development by using renewable raw m
Matéria (Rio J.). Publicado em: 2015-09
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6. Selective Hydrogenolysis of Glycerol to 1,2-Propanediol Over Bimetallic Cu-Ni Catalysts Supported on γ-Al2O3
A series of Cu or Ni monometallic and Cu-Ni bimetallic catalysts supported on γ-Al2O3 were synthesized by incipient wetness impregnation method. X-ray diffraction results exhibited the formation of bimetallic Cu-Ni phase in the reduced Cu-Ni(1:1)/γ-Al2O3 catalyst. Among the catalyst examined for hydrogenolysis
J. Braz. Chem. Soc.. Publicado em: 2015-08
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7. Hydrogenolysis of 2-tosyloxy-1,3-propanediol into 1,3-propanediol over Raney Ni catalyst
2-Tosiloxi-1,3-propanodiol (TPD), um potencial precursor para produção de 1,3-propanodiol (1,3-PD), é produzido através da tosilação do glicerol com a ajuda de uma técnica de proteção de grupos. Neste trabalho, discutiu-se a hidrogenólise do TPD em 1,3-PD sobre catalisador de Raney Ni através de diferentes parâmetros de reação para otimizar as
J. Braz. Chem. Soc.. Publicado em: 2013-03
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8. Hidrogenólise de glicerol catalisada por Pt, Pd e Ru suportados em nióbia, alumina e suas misturas / Hydrogenolysis of glycerol catalyzed by Pt, Pd and Ru supported on niobia, alumina and their mixtures
A produção de biodiesel tem sofrido incrementos significativos e paralelamente a isto o aumento proporcional dos subprodutos derivados, como o glicerol. Apesar das múltiplas aplicações deste produto, o preço tem diminuído e estima-se que haverá um excedente significativo nos próximos anos, sendo assim, a necessidade de novas aplicações da glicerin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/04/2011
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9. Preparation and characterization oF Ru-Sn/Al2O3 catalysts for the hydrogenation of fatty acid methyl esters
Ru-Sn/Al2O3 catalysts with different Sn loadings were prepared by the coimpregnation method. Several characterization techniques such as TPR, pyridine TPD and catalytic tests for dehydrogenation and hydrogenolysis were used to evaluate and compare such catalysts. TPR results indicate that Sn is deposited both onto the support and as species strongly interact
Química Nova. Publicado em: 2010
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10. Selective hydrogenolysis of glycerol on ruthenium catalysts supported on niobium, silica and alumina / Hidrogenólise seletiva do glicerol em catalisadores de rutênio suportado em nióbio, sílica e alumina
Foram avaliados os catalisadores de Ru suportados em Nióbia, Sílica e Alumina na Hidrogenólise seletiva de Glicerol para a obtenção de propanodióis (1,2 e 1,3 - Propanodiol). O método de preparação utilizado para os três catalisadores foi o de impregnação úmida partindo-se de uma solução aquosa do sal precursor RuCl3.1,37H2O cuja porcentagem e
Publicado em: 2010
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11. Gliceroquímica: novos produtos e processos a partir da glicerina de produção de biodiesel
Glycerol is a byproduct of biodiesel production through transesterification of oils and fat. This article discusses the chemical transformation of glycerol in ethers, acetals and esters of high technological applications, especially in the fuel sector. Glycerol hydrogenolysis, dehydration to acrolein and oxidation are discussed as well, to show the potential
Quím. Nova. Publicado em: 2009
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12. Síntese de 2-iodobenzamidas e 3-(iodoacetamido)benzamidas ligadas à D-galactose e suas reações de carbociclização radicalar mediadas por hidreto de tri-n-butilestanho
Starting from methyl 6-O-allyl-4-azido-2,3-di-O-benzyl-4-deoxy-α-D-galactopyranoside, four new derivatives containing 2-iodobenzamido and 3-(iodoacetamido)benzamido groups were synthesized. These four compounds were submitted to tri-n-butyltin hydride mediated radical cyclization reactions, resulting in two macrolactams from 11- and 15-endo aryl radical cyc
Química Nova. Publicado em: 2009