نتایج جستجو برای: nial2o4

تعداد نتایج: 64  

2004
P. Muralidharan I. Prakash M. Venkateswarlu N. Satyanarayana

Nanocomposite of NiAl2O4/SiO2 (NAS) was prepared through insitu solgel reaction, in which NiAl2O4 nanocrystals were dispersed in the silica glassy matrix. The prepared dried NAS gel, at 338 K, was heat treated to different temperature and identified the temperature range (1083 – 1163 K) of the nanocomposite formation through XRD patterns. From XRD patterns, crystallite size of NiAl2O4 particles...

2017
Lucia Blas Patrick Dutournié Sophie Dorge Ludovic Josien Damaris Kehrli Arnold Lambert

The influence of the preparation method of NiAl2O4 binders on their thermal stability was studied. For this purpose, the reactivity of two different NiAl2O4 binders with CO as fuel was studied in a fixed bed reactor device. Successive oxidation-reduction cycles were performed 25

2006
Kaimin Shih James O. Leckie

ncorporating Ni-laden waste sludge into kaolinite-based construction ceramic materials appears promising based on the identified nickel bearing hases, evaluated incorporation efficiency and nickel leachability of the products. Nickel aluminate spinel (NiAl2O4) results from sintering kaolinite nd nickel oxide between 990 and 1480 ◦C, with more than 90% incorporation efficiency achieved at 1250 ◦...

2010
Daisuke Maruoka Makoto Nanko

The oxidation kinetics of 5 vol% nano-Ni dispersed Al2O3 with Si-doping (nano-Ni/Al2O3-Si) was studied in the present paper. The starting powder mixture was prepared by drying aqueous slurry consisting of alumina with nickel nitrate and Si (OCH3)4. The powder mixture was reduced at 600 C for 12 h in a stream of Ar-1%H2 gas mixture. Nano-Ni/Al2O3-Si was densified by pulsed electric current sinte...

Journal: :Chemical communications 2015
L Zhou Y Guo J-M Basset H Kameyama

This communication presents the successful design of a structured catalyst based on porous anodic alumina membranes for methane dry reforming. The catalyst with a strong Ni-NiAl2O4 interaction shows both excellent activity and stability.

Journal: :Catalysts 2022

The catalyst regeneration is still a challenge to make the ethanol steam reforming (ESR) process feasible for sustainable H2 production. NiAl2O4 spinel derived catalysts are highly active and selective ESR, but they require avoiding irreversible deactivation ensure their regeneration. Their stability depends on structure, herein we report different Ni/Al2O3-NiAl2O4 obtained upon reduction of at...

Journal: :Journal of the Japan Society of Powder and Powder Metallurgy 1959

Journal: :Environmental science & technology 2006
Kaimin Shih Tim White James O Leckie

Stabilization efficiencies of spinel-based construction ceramics incorporating simulated nickel-laden waste sludge were evaluated and the leaching behavior of products investigated. To simulate the process of immobilization, nickel oxide was mixed alternatively with gamma-alumina, kaolinite, and hematite. These tailoring precursors are commonly used to prepare construction ceramics in the build...

Journal: :Journal of the Japan Society of Powder and Powder Metallurgy 2013

Journal: :Journal of Physics: Condensed Matter 2002

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