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Effect of Additives on Catalytic Cracking of Biomass Gasification Tar over a Nickel-Based Catalyst
biomass gasification tar supported catalyst palygorskite nickel additive carbon deposition tar removal
2011/11/14
The palygorskite-supported nickel (Ni/PG) catalysts were modified by loading with several additives (Fe, Mg, Mn, and Ce) by
incipient wetness impregnation. The effect of the additives and their conte...
Influence of the clay and the nickel content in catalysts for vegetable oil hydrogenation
Influence of the clay nickel content catalysts vegetable oil hydrogenation
2011/11/10
Nickel catalysts prepared using two different clays as support, natural bentonite and palygorskite, and with different nickel contents have been tested in the hydrogenation of a sunflower oil. The inf...
A Nickel Hydroxide-Vermiculite Complex: Preparation and Characterization
Clay-Inorganic Complex One-Dimensional Fourier Electron Density Map Nickel Hydroxide Vermiculite
2011/12/8
Abstract: A nickel hydroxide-vermiculite complex (NHVC) with csinβ = 1.41 nm and particle sizes from 0.075 to 0.15 mm was obtained hydrothermally by adding nickel nitrate solution to vermiculite from ...
Removal of Nickel and Cobalt from Aqueous Solutions by Na-Activated Bentonite
Adsorption Bentonite Cation Exchange Clays Cobalt Removal Heavy Metals Nickel Removal Wastewater
2011/12/7
Abstract: The ability of Na-activated bentonite to remove Ni2+ and Co2+ from aqueous solutions at room temperature (22 ± 1°C) was studied under various experimental conditions. The parameters studied ...
Site occupancies in synthetic monoclinic amphiboles: Rietveld structure refinement and infrared spectroscopy of (nickel, magnesium, cobalt)-richterite
Site occupancies synthetic monoclinic amphiboles Rietveld structure refinement infrared spectroscopy nickel magnesium cobalt richterite
2012/4/5
Amphibolesweresynthesizedat750C,1kbar(H O)onthebinaryjoins(nickel,
magnesium)-richteriteand(magnesium,cobalt)-richterite.Structuralvariationsandsiteoc-
cupancieswerecharacterizedbyRietveldstructurer...
The Quantity of Reduced Nickel in Synthetic Takovite: Effects of Preparation Conditions and Calcination Temperature
Calcination Nickel particle size Takovite Temperature programmed reduction
2011/12/28
Takovite, Ni6Al2(OH)16CO3·5H2O, with molar Ni/Al ratios of 2.5 and 3 is prepared by precipitation at pH levels of 7 and 10, periods of reaction of 3 and 20 hr, and calcination temperatures varying bet...
X-ray Photoelectron Spectroscopic Study of Cobalt(II) and Nickel(II) Sorbed on Hectorite and Montmorillonite
Cation exchange Cobalt Hectorite Ligand exchange Montmorillonite Nickel X-ray photoelectron spectroscopy
2011/11/30
Abstract: The safe disposal of 60Co, 63Ni, and 59Ni has required considerable information on the interactions of Co2+ and Ni2+ with clay minerals in the geosphere. X-ray photoelectron spectroscopy (XP...
Effect of Ionic Strength and Ion Pair Formation on the Adsorption of Nickel by Kaolinite
Ion speciation Ionic strength Ion pair Kaolinite Nickel adsorption
2012/2/10
Adsorption of Ni(II) by Ca- and Na-saturated kaolinites was studied in equilibrating solutions with total Ni concentrations ranging from 118 to 946 ?liter. Background electrolytes used in these experi...
Hydroxy-Nickel Interlayering in Montmorillonite by Titration Method
Chlorite Interlayer Montmorillonite Nickel Potentiometric
2011/11/18
Abstract: Nickel nitrate solution is potentiometrically titrated (a) with montmorillonite, (b) without montmorillonite, in the nitrate solution. X-ray powder diffraction and chemical analyses are made...
A Golden-Colored, Ferri-Nickel Chloritic Mineral from Morro Do Niquel, Minas Gerais, Brazil
Golden-Colored Ferri-Nickel Chloritic Mineral Morro Do Niquel
2011/11/18
Abstract: A golden-colored, flaky mineral from Morro do Niquel, Minas Gerais, Brazil, gives an X-ray diffraction pattern of a IIb chlorite polytype, with basal spacing 14·21 【 0·02 ∈ and b = 9·23 ∈. T...
Nickel Containing Regularly Interstratified Chlorite-Saponite from Szklary, Lower Silesia, Poland
Chlorite-Saponite Lower Silesia new mineral species
2012/2/13
The present paper describes a new mineral species, namely a regularly interstratified chlorite —trioctahedral smectite bearing as much as 24% NiO. The high Ni content proves it to be nickel mineral.On...
Exchangeable Cation Distribution in Nickel- and Magnesium- Vermiculites
Exchangeable Cation Distribution Magnesium- Vermiculites
2012/2/15
Abnormal scatterings of X-rays take place between Bragg spots. Their study in hydrated Mg- and Ni-vermiculites shows that they appear in reciprocal space in the form of modulated lines, elongated alon...
Transformation of Montmorillonite to Nickel-Chlorite
Transformation Montmorillonite Nickel-Chlorite
2012/2/21
Nickel-chlorite has been obtained by the co-precipitation of nickelous hydrous oxide and montmorillonite at an OH/Ni ratio of 2·0. Chemical analysis shows that 16 me of Ni is fixed per gram of clay. S...