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Lafficher R, Digne M, Salvatori F, Boualleg M, Colson D, Puel F. Influence of micromixing time and shear rate in fast contacting mixers on the precipitation of boehmite and NH4-dawsonite. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2017.10.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Lafficher R, Digne M, Salvatori F, Boualleg M, Colson D, Puel F. Ammonium aluminium carbonate hydroxide NH4Al(OH)2CO3 as an alternative route for alumina preparation: Comparison with the classical boehmite precursor. POWDER TECHNOL 2017. [DOI: 10.1016/j.powtec.2017.07.080] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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El-Sharkawy E. Textural, Structural and Catalytic Properties of ZnCr2O4–A12O3 Ternary Solid Catalysts. ADSORPT SCI TECHNOL 2016. [DOI: 10.1177/026361749801600304] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Two series of ternary solid catalysts containing Al, Cr and Zn but with different ZN2+ or Cr3+ ion contents were prepared by impregnation methods. All systems were calcined by heating within the temperature range 773–1073 K. Structural characterization of the systems was effected by X-ray diffraction (XRD) methods and by differential thermal analysis (DTA). The textural properties of the precalcined products were measured from adsorption/desorption studies of nitrogen at 77 K. The surface acidities of the precalcined products were also studied using a poisoning method employing pyridine as the probe base. The adsorption and disproportionation of NO at 298 K was followed via in-situ FT-IR spectroscopic methods, while the catalytic activities of the prepared samples towards the dehydration (DHD)/dehydrogenation (DHG) of propan-2-ol were studied using a pulse microcatalytic technique. XRD and DTA analyses showed the presence of γ-A12O3 and ZnCr2O4 in the prepared samples but did not provide any evidence for other detectable species in the ternary solid materials. The disproportionation of NO, as well as the catalytic conversion of propan-2-ol, was apparently strongly influenced by the structural properties of these materials but to a lesser extent by their textural properties.
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Affiliation(s)
- E.A. El-Sharkawy
- Faculty of Education at Al-Arish. Suez Canal University, Al-Arish, Egypt
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Spetsow EA, Nefedova LA, Lavrishcheva SA. Chemisorption of microimpurities of nitrogen(II) and (IV) oxides in the presence of an excess amount of oxygen. RUSS J APPL CHEM+ 2014. [DOI: 10.1134/s1070427214040065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Hwang S, Hong UG, Lee J, Seo JG, Baik JH, Koh DJ, Lim H, Song IK. Methanation of carbon dioxide over mesoporous Ni–Fe–Al2O3 catalysts prepared by a coprecipitation method: Effect of precipitation agent. J IND ENG CHEM 2013. [DOI: 10.1016/j.jiec.2013.03.015] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Yalfani MS, Santiago M, Pérez-Ramírez J. In situ studies during thermal activation of dawsonite-type compounds to oxide catalysts. ACTA ACUST UNITED AC 2007. [DOI: 10.1039/b615264c] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Hellgardt K, Chadwick D. Effect of pH of Precipitation on the Preparation of High Surface Area Aluminas from Nitrate Solutions. Ind Eng Chem Res 1998. [DOI: 10.1021/ie970591a] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Klaus Hellgardt
- Imperial College of Science, Technology and Medicine, Department of Chemical Engineering and Chemical Technology, London SW7 2BY, U.K
| | - David Chadwick
- Imperial College of Science, Technology and Medicine, Department of Chemical Engineering and Chemical Technology, London SW7 2BY, U.K
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Nakayama T, Sato S, Nozaki F. Physical and Catalytic Properties of MgO Prepared Using Citric Acid. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1996. [DOI: 10.1246/bcsj.69.2107] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Control of porosity and surface area in TiO2-Al2O3 mixed oxides supports by means of ammonium carbonate. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/s0167-2991(06)81777-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Okada K, Kawashima H, Saito Y, Hayashi S, Yasumori A. New preparation method for mesoporous γ-alumina by selective leaching of calcined kaolin minerals. ACTA ACUST UNITED AC 1995. [DOI: 10.1039/jm9950501241] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Rhee YW, Guin JA. Preparation of alumina catalyst supports and NiMo/Al2O3 catalysts. KOREAN J CHEM ENG 1993. [DOI: 10.1007/bf02697403] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Rodríguez O, González F, Bosch P, Portilla M, Viveros T. Physical characterization of TiO2 and Al2O3 prepared by precipitation and sol-gel methods. Catal Today 1992. [DOI: 10.1016/0920-5861(92)80026-j] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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