Buscar
Mostrando ítems 71-80 de 841
Supported heteropolycompounds as ecofriendly catalysts for 2,6-dimethylphenol oxidation to 2,6-dimethyl-1,4-benzoquinone
(Elsevier Science, 2008-01)
Supported catalysts were prepared by in situ deposition of the cesium salt of H4PMo11VO40. Commercial silica was impregnated to incipient wetness with an aqueous solution of CsNO3. The dried and calcined solid was then ...
First Report About the Use of Micellar Keggin Heteropolyacids as Catalysts in the Green Multicomponent Synthesis of Nifedipine Derivatives
(Springer, 2016-06-24)
Micellar Keggin heteropolyacid catalysts were prepared using hexadecyltrimethylammonium bromide (cetyltrimethylammonium bromide—CTAB), 1-hexadecyl-pyridinium chloride, and Keggin heteropolyacids H3PMo12O40 and H4PMo11VO40 ...
ACIDITY OF H3PW12O40/SiO2 AND CATALYTIC ACTIVITY OF a -PINENE
(Sociedad Chilena de Química, 2003)
Síntese e caracterização de catalisadores SnO2.Nb suportado em argila maranhense
(2018-01-01)
The development and optimization of heterogeneous catalysts is a fundamental step to ensure the technical and economic feasibility of new materials created for a wide range of applications, including catalytic applications. ...
ACETYLATION OF BANANA (MUSA PARADISIACA L.) AND MAIZE (ZEA MAYS L.) STARCHES USING A MICROWAVE HEATING PROCEDURE AND IODINE AS CATALYST: PARTIAL CHARACTERIZATION.
(2013-02-26)
Banana and maize starches were acetylated with acetic anhydride in the presence of different levels of catalytic agent (iodine) using microwave heating. Degree substitution, he Fourier transforms infrared (FT-IR) spectra, ...
Efeito da concentração de irídio sobre as propriedades de catalisadores do tipo Pt-Ge-Ir/Al2O3
(Programa de Pós-Graduação em Química da UFBA, 2008)
Neste trabalho, foi estudado o efeito do conteúdo de irídio na atividade, seletividade e estabilidade de catalisadores de platina, irídio e germânio suportados em alumina, destinados à reforma catalítica de nafta de petróleo. ...
Rh-decorated PtIrOx nanoparticles for glycerol electrooxidation: Searching for a stable and active catalyst
(Elsevier Science, 2016-02)
We report a fast method of producing rhodium-decorated platinum nanoparticles (NPs) containing iridium oxides (IrOx) to be used in the glycerol electrooxidation reaction. We synthesize PtIrOx/C electrocatalysts of different ...
Melhoria do cetano em óleo diesel : abertura do ciclo da decalina sobre catalisadores de Pt, Ir ou Rh suportados em zeólitas FAU e BEA
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Engenharia Química - PPGEQ, 2011-06-08)
Environmental laws and stricter quality specifications have driven the development of technologies for improving the cetane number in diesel fuel. In addition to the saturation of (poly)aromatic compounds, responsible for ...
Bioenergy II: Acid Diphosphates as Catalysts for the Production of Methyl and Ethyl Esters from Vegetable Oils
(Walter De Gruyter GmbhBerlinAlemanha, 2009)