Adsorption of carbon dioxide in several aged hydrotalcites and calcined hydrotalcites:: Influence of microwave irradiation during the ageing step on their basic properties

被引:6
作者
Bergada, Olga
Salagre, Pilar
Cesteros, Yolanda
Medina, Francisco
Sueiras, Jesus E.
机构
[1] Univ Rovira & Virgili, Fac Quim, Tarragona 43007, Spain
[2] Univ Rovira & Virgili, Escola Tecn Super Enginyeria Quim, Tarragona 43007, Spain
关键词
D O I
10.1260/026361707782398191
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Several Ni/Mg/Al hydrotalcites were aged by autoclaving under microwave irradiation, refluxing under microwave irradiation and by traditional refluxing methods. The hydrotalcite aged by autoclaving under microwave irradiation at a higher temperature (453 K) and for a longer time (120 min) exhibited a higher surface area and a higher basicity than the hydrotalcites aged by refluxing under microwave irradiation or by traditional refluxing. This can be explained by the generation of surface-defective sites accompanied by a loss of aluminium due to the effect of microwave irradiation. However, after calcination, high-area mixed oxides obtained from hydrotalcites aged by refluxing under microwave irradiation exhibited a higher basicity per square metre than those obtained from hydrotalcites aged under more drastic conditions. For the hydrotalcites aged under microwave irradiation, this may be related to the surface characteristics of the amorphous alumina generated during calcination. The sample with the lowest amount of alumina was that obtained from the hydrotalcite which had been aged at a higher temperature and for a longer time.
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页码:143 / 154
页数:12
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共 19 条
  • [1] Effect of the Mg/Al ratio of the hydrotalcite-type precursor on the dispersion and activity of Rh and Ru catalysts for the partial oxidation of methane
    Basile, F
    Fornasari, G
    Rosetti, V
    Trifirò, E
    Vaccari, A
    [J]. CATALYSIS TODAY, 2004, 91-2 : 293 - 297
  • [2] Influence of microwave radiation on the textural properties of layered double hydroxides
    Benito, P.
    LabajoS, F. M.
    Rocha, J.
    Rives, V.
    [J]. MICROPOROUS AND MESOPOROUS MATERIALS, 2006, 94 (1-3) : 148 - 158
  • [3] HYDROTALCITE-TYPE ANIONIC CLAYS: PREPARATION, PROPERTIES AND APPLICATIONS
    Cavani, F.
    Trifiro, F.
    Vaccari, A.
    [J]. CATALYSIS TODAY, 1991, 11 (02) : 173 - 301
  • [4] Increasing the basicity and catalytic activity of hydrotalcites by different synthesis procedures
    Climent, MJ
    Corma, A
    Iborra, S
    Epping, K
    Velty, A
    [J]. JOURNAL OF CATALYSIS, 2004, 225 (02) : 316 - 326
  • [5] Structural requirements and reaction pathways in condensation reactions of alcohols an MgyAlOx catalysts
    Di Cosimo, JI
    Apesteguía, CR
    Ginés, MJL
    Iglesia, E
    [J]. JOURNAL OF CATALYSIS, 2000, 190 (02) : 261 - 275
  • [6] Influence of the acid-base properties of solid catalysts derived from hydrotalcite-like compounds on the condensation of formaldehyde and acetaldehyde
    Dumitriu, E
    Hulea, V
    Chelaru, C
    Catrinescu, C
    Tichit, D
    Durand, R
    [J]. APPLIED CATALYSIS A-GENERAL, 1999, 178 (02) : 145 - 157
  • [7] Microwave Irradiation Effect on Hydrotalcite Synthesis
    Fetter, G.
    Hernandez, F.
    Maubert, A. M.
    Lara, V. H.
    Bosch, P.
    [J]. JOURNAL OF POROUS MATERIALS, 1997, 4 (01) : 27 - 30
  • [8] Detrital Mg(OH)2 and Al(OH)3 in microwaved hydrotalcites
    Fetter, G
    Botello, A
    Lara, VH
    Bosch, P
    [J]. JOURNAL OF POROUS MATERIALS, 2001, 8 (03) : 227 - 232
  • [9] Microwave assisted rapid crystallization of Mg-M(III) hydrotalcite where M(III) = Al, Fe or Cr
    Kannan, S
    Jasra, RV
    [J]. JOURNAL OF MATERIALS CHEMISTRY, 2000, 10 (10) : 2311 - 2314
  • [10] Epoxidation of styrene with hydrogen peroxide using hydrotalcites as heterogeneous catalysts
    Kirm, I
    Medina, F
    Rodríguez, X
    Cesteros, Y
    Salagre, P
    Sueiras, J
    [J]. APPLIED CATALYSIS A-GENERAL, 2004, 272 (1-2) : 175 - 185