Gas Solid Reactions
Mostrando 1-12 de 29 artigos, teses e dissertações.
-
1. Concomitant Production of Hydrogen, Sodium Acetate, and Polymerized Species from Non-Catalytic Ethanol Dehydrogenation
A detailed study of the production of hydrogen and high added-value liquid products from the ethanol dehydrogenation reaction in the presence of sodium hydroxide (10% m m-1) was undertaken. Experiments were carried out in a batch reactor under different reaction conditions (temperature of 240 ºC and autogenous pressure between 45 and 72 bar), with analysis
J. Braz. Chem. Soc.. Publicado em: 2020-01
-
2. Synthetic Niobium Oxyhydroxide as a Bifunctional Catalyst for Production of Ethers and Allyl Alcohol from Waste Glycerol
A synthetic niobia was modified by treatment with hydrogen peroxide to be used as a catalyst for converting glycerol into petrochemical compounds. The catalytic properties of niobium oxyhydroxide were obtained by generating acidic and oxygenated groups (peroxo groups) on the solid surface. Compounds like ethers and allyl alcohol were obtained. A very active
J. Braz. Chem. Soc.. Publicado em: 2017-11
-
3. Fragmentation Reactions of Rhodamine B and 6G as Revealed by High Accuracy Orbitrap Tandem Mass Spectrometry
Correct interpretation of mass spectra is essential to our understanding of the ion chemistry occurring in the gas phase inside mass spectrometers and for constructing a solid knowledge from which mass spectrometry (MS) data of novel molecules will be interpreted. Assignments of product ions leading to incorrect dissociation mechanisms can also be dangerous
J. Braz. Chem. Soc.. Publicado em: 2017-01
-
4. ON THE SYNTHESIS OF MOLYBDENUM CARBIDE WITH COBALT ADDITION VIA GAS-SOLID REACTIONS IN A CH4/H2 ATMOSPHERE
Abstract Due to ever more severe environmental regulations regarding SOx, NOx and other pollutants' emissions, there has been an interest in developing new and improved catalysts for hydroprocessing reactions. Mo2C has been reported to display good selectivity and activity for those reactions, especially for HDS. Addition of another metal to the carbide stru
Braz. J. Chem. Eng.. Publicado em: 2016-09
-
5. Synthesis, Characterization and Applications of Iron Oxide Nanoparticles - a Short Review
ABSTRACT: Iron oxide is a mineral compound that shows different polymorphic forms, including hematite (α-Fe2O3), magnetite (Fe3O4) and maghemite (γ-Fe2O3). Solid propulsion technology nanoparticulate materials, such as hematite and maghemite, exhibit high performance on thermal decomposition of ammonium perchlorate. The enhanced catalytic effect of metalli
J. Aerosp. Technol. Manag.. Publicado em: 2015-09
-
6. Application of Computational fluid dynamic in aluminum refining through pneumatic injection of powders
Magnesium removal process from molten aluminum using particles of silica sand was studied from a hydrodynamic point of view using computational fluid dynamics (CFD). The gas-liquid flow was modeled by a model of the Euler type for both gas and liquid phase transport. Newton´s law of motion was used to describe the subsurface motion of injected solid particl
Mat. Res.. Publicado em: 2014-12
-
7. Biocatálise heterogênea em fase sólido/gás: princípios e aplicações
Enzymatic conversion of gaseous substrates into products in aquo-restricted media, using enzymes or whole cells (free and immobilized) as biocatalysts, constitutes a promising technology for the development of clearer processes. Solid-gas systems offer high production rates for minimal plant sizes, allow important reduction of treated volumes, and permit sim
Quím. Nova. Publicado em: 2014-04
-
8. Application of computational chemistry methods to obtain thermodynamic data for hydrogen production from liquefied petroleum gas
The objective of this study was to estimate thermodynamic data, such as standard enthalpy, entropy and Gibbs free energy changes of reaction and, consequently, chemical equilibrium constants, for a reaction system describing the hydrogen production from Liquefied Petroleum Gas (LPG). The acquisition of those properties was made using computational chemistry
Braz. J. Chem. Eng.. Publicado em: 2013-03
-
9. Desenvolvimento e caracterização de catalisadores de níquel suportados em matrizes CeO2-ZrO2-Al2O3, CeO2-La2O3-Al2O3 e ZrO2-La2O3-Al2O3 avaliados para as reações de reforma do metano / Development and characterization of nickel catalysts supported on CeO2-ZrO2-Al2O3, CeO2-La2O3-Al2O3 and ZrO2-La2O3-Al2O3 evaluated for the reactions of methane reforming
A reforma do metano é um processo de grande interesse industrial para a produção de hidrogênio e de gás de síntese. Entre as reações de reforma do metano, destacam-se as reações de reforma a vapor e a reação com dióxido de carbono. O catalisador comumente utilizado nos processos e Ni/Al2O3. Porém, durante este processo, ocorre uma indesejada fo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/04/2012
-
10. Simulação de Reações de craqueamento catalítico e térmico em riser industrial / Simulation catalytic and thermal cracking reactions at industrial riser
The dynamic behavior of a FCC (Fluidized Catalytic Cracking) industrial reactor was simulated employing 3D gas-solid ow models and applying the ten-lumps kinetic model developed by JACOB et al.(1976). The uid-dynamic and the chemical reactions predicted were validated with a set of plant data publicated in literature. Besides, there were added thermal cracki
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/01/2012
-
11. Modeling of a three-phase reactor for bitumen-derived gas oil hydrotreating
A three-phase reactor model for describing the hydrotreating reactions of bitumen-derived gas oil was developed. The model incorporates the mass-transfer resistance at the gas-liquid and liquid-solid interfaces and a kinetic rate expression based on a Langmuir-Hinshelwood-type model. We derived three correlations for determining the solubility of hydrogen (H
Brazilian Journal of Chemical Engineering. Publicado em: 2012-03
-
12. Sintese de materiais nanoestruturados MS IND. 2 (M = Mo, W) com alta pureza de fase e morfologia / Synthesis of MS IND. 2 (M = Mo, W) nanostructured materials with high purity of phase and morphology
The main of this Dissertation is the preparation of nanostructured WS2 and MoS2 from a template reaction with the respective nanorods oxides. Molybdenum oxide nanorods with diameters around 100 nm and microscale lengths were prepared from MoO3·2H2O via a one step solvothermal reaction. The formation of MoO3 rods proceeds in acidic media at 180 °C. The oxid
Publicado em: 2008