This work aimed at studying the feasibility of using mesoporous molecular sieves (MCM-41) as supports for palladium-based catalysts for methane combustion. The effects brought about by the chemical composition as well as by the presence of cerium and lanthanum were investigated. The MCM-41 structures were found to be thermally stable under air: the MCM-41 is stable until 1273 K while the [Al]-MCM-41 resists up to 1173 K. Silicate-based catalysts are more active than the aluminosilicate-supported Pd samples; while no changes were observed on the structure of the materials during the catalytic test, it was found that the addition of La and Cc decreased their activity. The catalytic activity was correlated with the hydrophobic character of the supports, and with the smaller temperature of PdO reduction presented by the catalysts. (C) 2007 Elsevier B.V. All rights reserved.
机构:
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USAUniv Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA
Carstens, JN
Su, SC
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机构:Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA
Su, SC
Bell, AT
论文数: 0引用数: 0
h-index: 0
机构:Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA
机构:
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USAUniv Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA
Carstens, JN
Su, SC
论文数: 0引用数: 0
h-index: 0
机构:Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA
Su, SC
Bell, AT
论文数: 0引用数: 0
h-index: 0
机构:Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA