Microemulsion-assisted synthesis of catalysts based on aluminium and magnesium phosphates

Aramendía, M. A.; Boráu, V.; Jiménez, César; Marinas, J. M.; Romero, Francisco J.; Urbano, Francisco J.

doi:10.1016/s1381-1169(01)00470-8

Cited by 7 publications

(2 citation statements)

References 34 publications

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“…The data presented are referred to structural parameters obtained from the N 2 adsorptiondesorption and CO 2 adsorption isotherms, surface atomic concentration obtained by XPS and surface acidity of the carbon obtained by adsorption, desorption and TPD of ammonia. The chemical activation of olive stone with H 3 PO 4 produces an activated carbon with a wide microporous structure and a high apparent surface area (902 m 2 /g), higher than those corresponding to other acid catalysts reported in the literature 8, 41, 42. The higher value of A BET with respect to that of A DR indicates the existence of a wide microporous structure 43.…”

Section: Resultsmentioning

confidence: 71%

“…The chemical activation of olive stone with H 3 PO 4 produces an activated carbon with a wide microporous structure and a high apparent surface area (902 m 2 /g), higher than those corresponding to other acid catalysts reported in the literature. 8,41,42 The higher value of A BET with respect to that of A DR indicates the existence of a wide microporous structure. 43 The carbon catalyst presents also a relatively high value of the external surface area A s , of 113 m 2 /g, which is important in catalytic applications.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

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Kinetic study of the decomposition of 2‐butanol on carbon‐based acid catalyst

et al. 2009

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in Wiley InterScience (www.interscience.wiley.com).The catalytic conversion of 2-butanol on a carbon-based acid catalyst prepared by chemical activation of olive stone with phosphoric acid was investigated. The carbon catalyst showed a considerable amount of surface phosphorus, presumably in form of phosphate groups, as revealed by XPS, despite a washing step carried out after the activation process. Conversion of 2-butanol yields mainly dehydration products, mostly cis-2-butene and trans-2-butene with lower amounts of 1-butene, and a very small amount of mek as dehydrogenation product. Kinetic interpretation of the experimental data was performed using two elimination mechanisms for the dehydration reaction; an E1-mechanism (two-step mechanism) and an E2-mechanism (one-step mechanism). The rate expressions derived from both models fit properly the experimental results, suggesting that probably the two mechanisms occur simultaneously. This is supported by the similar rate constant obtained for the formation of the carbocation and the olefins in the E1 and E2 mechanisms, respectively. V

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Section: Resultsmentioning

confidence: 71%

Section: Catalyst Characterizationmentioning

confidence: 99%

Kinetic study of the decomposition of 2‐butanol on carbon‐based acid catalyst

et al. 2009

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Precipitation and Coprecipitation

Hesse¹,

Unger²

2008

Handbook of Heterogeneous Catalysis

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The sections in this article are Introduction General Principles Governing Precipitation from Solutions Physico‐Chemical Considerations Chemical Considerations Process Considerations Influencing the Properties of the Final Product Influence of Raw Materials Influence of Concentration and Composition Solvent Effects Influence of Temperature Influence of p H Influence of Aging Influence of Additives Prototypical Examples of Precipitated Catalysts and Supports Silica as Support Material Active Aluminas Ni /Al 2 O 3 Catalysts by Coprecipitation V / P / O Catalysts for Butane Oxidation to Maleic Anhydride Conclusions

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