2009
DOI: 10.1590/s0103-97332009000200019
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Abstract: Synthesis of polymorphous of nanoparticulate alumina has been the subject of many works. The stabilization of these nanoparticles in aqueous suspensions is necessary in many technologic application and industrial products. Recently, a number of routes have been developed using various dispersants to prepare these nanoparticles dispersed in aqueous solution. In this work, nanoparticulate alumina prepared by precipitation and freezing drying was investigated as potential material for aqueous dispersion. These na… Show more

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Cited by 4 publications
(2 citation statements)
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“…The peaks of 2θ = 25° and 44° disappeared while the other peaks are distinctive. The pattern with these peaks is well-matched with the XRD pattern of γ-alumina material, which is a major part of FCC catalyst components . The peaks in the pattern are relatively weaker than fresh materials because catalysts were deactivated during aging time in the deposit.…”
Section: Resultssupporting
confidence: 59%
“…The peaks of 2θ = 25° and 44° disappeared while the other peaks are distinctive. The pattern with these peaks is well-matched with the XRD pattern of γ-alumina material, which is a major part of FCC catalyst components . The peaks in the pattern are relatively weaker than fresh materials because catalysts were deactivated during aging time in the deposit.…”
Section: Resultssupporting
confidence: 59%
“…The catalysts of three ways (TWC -Three-Way Catalyst) are advanced systems of emission treatment of gasoline vehicles that reduce significantly the emissions of carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NOx) in atmosphere (Collins & Twigg 2007). Nevertheless, there is a steady increase in world production of vehicles powered by gasoline and by other types of fuel such as alcohol, gas and mix of fuel, leading to constant research in order to improve the catalysts already known and to develop new models (Mizukami et al, 1991;Silva et al, 2009& Sideris, 1997.…”
Section: Introductionmentioning
confidence: 99%