共 19 条
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
论文数: 0 引用数: 0
h-index: 0
机构: Univ Rovira & Virgili, Fac Quim, Tarragona 43007, Spain

Salagre, Pilar
论文数: 0 引用数: 0
h-index: 0
机构: Univ Rovira & Virgili, Fac Quim, Tarragona 43007, Spain

Cesteros, Yolanda
论文数: 0 引用数: 0
h-index: 0
机构: Univ Rovira & Virgili, Fac Quim, Tarragona 43007, Spain

Medina, Francisco
论文数: 0 引用数: 0
h-index: 0
机构: Univ Rovira & Virgili, Fac Quim, Tarragona 43007, Spain

Sueiras, Jesus E.
论文数: 0 引用数: 0
h-index: 0
机构: Univ Rovira & Virgili, Fac Quim, Tarragona 43007, Spain
机构:
[1] Univ Rovira & Virgili, Fac Quim, Tarragona 43007, Spain
[2] Univ Rovira & Virgili, Escola Tecn Super Enginyeria Quim, Tarragona 43007, Spain
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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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