1. De-NOx Performance and Mechanism of Mn-Based Low-Temperature SCR Catalysts Supported on Foamed Metal Nickel

A series of manganese-based catalysts supported on foamed metal nickel (FMN) with various Mn/Ni ratios was prepared for low-temperature selective catalytic reduction (SCR) of NO with NH3 (NH3-SCR). The effects of calcination temperature, amount of added Mn, optimal operating conditions, and H2O on the elimination of nitrogen oxides (de-NOx) performance of ca

J. Braz. Chem. Soc.. Publicado em: 2018-08

2. Síntesis y propiedades de electrodos de níquel/grafeno para generación de hidrógeno

ABSTRACT The use of nanomaterials, such graphene oxide (GO), as blocks for the synthesis of hybrid materials has been extensively studied in recent years. In this paper a simple and reproducible method for the synthesis of hybrid nickel/graphene electrodes is presented. This method involves the modification of a conventional electroplating nickel bath by inc

Matéria (Rio J.). Publicado em: 19/07/2018

3. Electrocatalytic Oxidation Removal of Phenol from Aqueous Solution with Metal Oxides Doped Carbon Aerogel

Metal oxides (manganese oxide, MnO, manganese dioxide, MnO2, copper oxide, CuO, zinc oxide, ZnO and nickel oxide, NiO) doped carbon aerogel (CA) were prepared and used as catalysts in heterogeneous oxidation of phenol from aqueous solution in a three-dimensional (3D) electrode reactor. Textural characterization of metal oxides doped CA showed that the metal

J. Braz. Chem. Soc.. Publicado em: 2018-04

4. SBA-15 as a Support for Nickel-Based Catalysts for Polymerization Reactions

Two mesoporous SBA-15 materials with different morphologies (spherical and fiber-shaped) were synthesized and evaluated as supports for nickel-based catalysts for polymerization reactions. The supports were pretreated with trimethylaluminum (TMA), and the catalyst dibromo-bis(4-amino-2,3,5,6-tetramethylimino)acenaphthene nickel(II) was attached to the suppor

J. Braz. Chem. Soc.. Publicado em: 2018-02

5. MORE ACTIVE AND SULFUR RESISTANT BIMETALLIC Pd-Ni CATALYSTS

The influence of the kind of metal precursor and the sequence of impregnation on the properties of Pd-Ni catalysts was evaluated during the test reaction of selective hydrogenation of styrene to ethylbenzene by means of physicochemical characterization. The focus was put on the final hydrogenating activity and the resistance to deactivation by sulfided compo

Quím. Nova. Publicado em: 2018-02

6. Evaluation of nickel and copper catalysts in biogas reforming for hydrogen production in SOFC

ABSTRACT The solid oxide fuel cells (SOFC) enable the efficient generation of clean energy, fitting the current requirements of the growing demand for electricity and for the environment preservation. When powered with biogas (from digesters of municipal wastes), the SOFCs also contribute to reduce the environmental impact of these wastes. The most suitable

Matéria (Rio J.). Publicado em: 22/05/2017

7. Strontium and Nickel Heterogeneous Catalysts for Biodiesel Production from Macaw Oil

It is presented herein heterogeneous catalysts comprised of strontium and nickel oxides synthesized using a coprecipitation method. They were applied for the preparation of biodiesel from macaw palm oil. The catalysts were characterized by X-ray diffraction (XRD), adsorption and desorption of nitrogen by Brunauer-Emmett-Teller (BET) and Barrett-Joyner-Halend

J. Braz. Chem. Soc.. Publicado em: 2017-02

8. OXIDATIVE-REFORMING OF METHANE AND PARTIAL OXIDATION OF METHANE REACTIONS OVER NiO/PrO2/ZrO2 CATALYSTS: EFFECT OF NICKEL CONTENT

Abstract In this work the behavior of NiO-PrO2-ZrO2 catalysts containing various nickel loadings was evaluated in the partial oxidation of methane and oxidative-reforming reactions of methane. The catalysts were characterized by X-Ray Diffraction Analysis (in situ-XRD), Temperature Programmed Reduction (H2-TPR), Scanning Electron Microscopy (SEM/EDX) and Ads

Braz. J. Chem. Eng.. Publicado em: 2016-09

9. Synthesis of Nickel Nanoparticles Supported on Carbon Using a Filter Paper as Biomorphic Pattern for Application in Catalysis

Nickel catalysts supported over an amorphous carbon were obtained by a one-step synthesis method based on the mineralization of cellulosic paper impregnated with a salt of nickel. The effect of the mineralization temperature on material characteristics was studied. The characterization of samples revealed the formation of nickel nanoparticles well dispersed

Mat. Res.. Publicado em: 03/11/2015

10. Flash Pyrolysis of Oleic Acid as a Model Compound Adsorbed on Supported Nickel Catalysts for Biofuel Production

A pirólise rápida do ácido oleico foi estudada sobre catalisadores com 10% Ni suportados em sílica e alumina. Os catalisadores foram impregnados com 10% m/m de ácido oleico. Os precursores secos e os catalisadores contendo ácido oleico foram caracterizados por análise termogravimétrica. Os catalisadores calcinados foram analisados por difração de r

J. Braz. Chem. Soc.. Publicado em: 2014-12

11. Textural properties of nickel, palladium and titanium oxides supported on MCM-41 materials and their application on oxidative desulfurization of dibenzothiophene

Textural and catalytic properties of nickel, palladium or titanium oxides supported on MCM-41 materials were evaluated in this paper. The results indicated that the MCM-41 material with well defined and highly ordered hexagonal structure was obtained. After metal ions impregnation and calcinations, the structure of MCM-41 was preserved and formed metallic ox

Mat. Res.. Publicado em: 27/09/2013

12. Reação de deslocamento de gás d Água sobre catalisadores de cobre e níquel suportados em alumina e nanofibra de carbono / Water gas shift reaction over copper and nickel catalysts supported on alumina and carbon nanofibers

A reação de deslocamento de gás d água, também conhecida como water gas shift reaction (WGSR), é muito utilizada na produção de hidrogênio, por meio da conversão do monóxido de carbono em CO2 e da água em H2. No presente trabalho, catalisadores de cobre e níquel suportados em alumina ou nanofibras de carbono (NFC) foram utilizados para estudo da

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/08/2012