Glycerol 98
Mostrando 1-12 de 44 artigos, teses e dissertações.
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1. Catalytic Dehydration of Glycerol to Acrolein over Aluminum Phosphate Catalysts
Gas phase conversion of glycerol to acrolein over a variety of aluminum phosphate (AlP) catalysts synthesized by a simple replacement reaction method with a variation in calcination temperature (300-700 ºC, AlP-300, AlP-400, AlP-500, AlP-600, and AlP-700, respectively) has been investigated. The textural properties, acidities and coke contents of the sample
J. Braz. Chem. Soc.. Publicado em: 2020-08
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2. Regenerated Cellulose Membrane from Peanut Shell for Biodiesel Purification
Biodiesel purification by water washing has been proved to be an unattractive process from an economic and environmental point of view. In this work, we propose the use of regenerated cellulose membranes from peanut shell as an alternative in the biodiesel purification. The preparation of the membranes was optimized from a central composite design, resulting
J. Braz. Chem. Soc.. Publicado em: 2020-05
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3. SIMULTANEOUS LIPID AND CAROTENOID PRODUCTION BY STEPWISE FED-BATCH CULTIVATION OF Rhodotorula mucilaginosa WITH CRUDE GLYCEROL
Abstract In the present study, an innovative cultivation strategy of Rhodotorula mucilaginosa CCT 7688 to accumulate both lipids and high added value carotenoids was proposed, with the potential to contribute to the economic feasibility of microbial oils in comparison with vegetable oils. The stepwise fed-batch cultivation with crude glycerol feeding at 24 h
Braz. J. Chem. Eng.. Publicado em: 09/12/2019
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4. RE-ESTERIFICATION OF MACAUBA ACID OIL USING GLYCEROL FOR ACIDITY REDUCTION AND BIODIESEL PRODUCTION
Abstract Biodiesel production using acid oils is an important alternative for biofuel cost reduction. However, it is a huge challenge for homogeneous transesterification, the main industrial route commonly used. This paper presents macauba oil with high acidity, 43.90 w/w%, as a potential raw material for biodiesel production. The acidity was reduced to 0.8
Braz. J. Chem. Eng.. Publicado em: 09/12/2019
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5. ADSORÇÃO DE CONTAMINANTES DO BIODIESEL POR FIBRAS DE BAGAÇO MODIFICADAS NA SUPERFÍCIE
Sugarcane bagasse fibers chemically modified on its surface were used to adsorb contaminants from biodiesel. Two biodiesel samples were used as adsorbates: crude and washed biodiesel. The contaminants were mainly glycerol and water, but also ions, and methanol. The biodiesel is usually washed, in order to remove most of the contaminants, but the procedure in
Quím. Nova. Publicado em: 2018-02
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6. Performance and carcass characteristics of dairy steers fed diets containing crude glycerin
ABSTRACT The objective of the study was to assess the effects of including 0, 79.8, 159.8, and 240.0 g kg-1 crude glycerin in the total diet dry matter on the 84 days feedlot performance, nutrient digestibility, blood parameters, and carcass characteristics of crossbred dairy steers. Experimental diets were composed of 98.5 g kg-1 of sorghum silage and 901.5
R. Bras. Zootec.. Publicado em: 2016-11
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7. Synthesis of Triacetin and Evaluation on Motor
Triacetin (or glycerol triacetate) was obtained by acetylating the glycerol by-product of biodiesel production process. This procedure is an interesting alternative that follows the principles of green chemistry. In this work, triacetin was synthesized using reactions between glycerol and acetic acid, as well as glycerol and acetic anhydride, using homoge
J. Braz. Chem. Soc.. Publicado em: 2015-08
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8. Wet oxidation of glycerol into fine organic acids: catalyst selection and kinetic evaluation
The liquid phase oxidation of glycerol was performed producing fine organic acids. Catalysts based on Pt, Pd and Bi supported on activated carbon were employed to perform the conversion of glycerol into organic acids at 313 K, 323 K and 333 K, under atmospheric pressure (1.0 bar), in a mechanically agitated slurry reactor (MASR). The experimental results ind
Braz. J. Chem. Eng.. Publicado em: 2014-12
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9. Avaliação da permeabilidade em membrana tubular de TiO2/AL2O3 dos constituintes do sistema reacional heterogêneo para produção de biodiesel / Assessment of tubular membrane permeability in the constituents TiO2/AL2O3 reaction heterogeneous system for the production of biodiesel
In addition to being biodegradable and renewable, Biodiesel presents physicochemical properties very similar to those of petroleum-based diesel, so a new engine is not required for its use. The most commonly used chemical process for obtaining biodiesel is transesterification. In this process, through the reaction of an alcohol with triacylglycerols (TAG) pr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/08/2011
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10. Produção de biodisel : processo e caracterizações / Biodiesel production : process and characterization
O biodiesel (ésteres) é um combustível que pode ser produzido a partir de óleos vegetais, gorduras animais e óleo de origem microbiana (algas, fungos e bactérias). As matérias-primas são convertidas em biodiesel por meio de uma reação química envolvendo álcool e catalisador. Esta reação é chamada de transesterificação ou etanólise, caso o �
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/07/2010
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11. Co-digestÃo anaerÃbia de glicerina bruta e efluente de fecularia
O Programa Nacional de ProduÃÃo e Uso do Biodiesel, lanÃado pelo Governo Federal, introduz o biodiesel na matriz energÃtica brasileira com a perspectiva de aumento da oferta de glicerina, co-produto gerado na produÃÃo do biodiesel. Uma vez que, para cada 100 L de biodiesel sÃo produzidos 10 kg de glicerina bruta, isto implica o desenvolvimento de estu
Publicado em: 2009
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12. RECONSTRUÇÃO DE RUPTURAS INDUZIDAS NO TENDÃO EXTENSOR DIGITAL LONGO EM PÔNEIS, UTILIZANDO HOMOIMPLANTE TENDÍNEO PRESERVADO EM GLICERINA 98% E FIO NÁILON MONOFILAMENTOSO / THE RECONSTRUCTION OF INDUCED RUPTURE IN THE LONG DIGITAL EXTENSOR TENDON IN PONIES USED TENDON HOMOGRAFT PRESERVED IN GLYCERIN 98% AND MONONYLON SUTURE.
O tendão do músculo extensor digital longo (TEDL) pode sofrer ferimento traumático com considerável perda de segmento, tornando extremamente difícil o seu reparo primário devido à contratura dos músculos e contaminação da ferida. Com base nesta observação foi elaborado um modelo experimental em que foram utilizados seis pôneis adultos com peso m
Publicado em: 2007