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Preparation, performances and reaction mechanism for the synthesis of H2O2 from H2 and O2 based on palladium membranes
Full text linkPalladium-modified catalytic membranes for the direct synthesis of H2O2: preparation and performance in aqueous solution
No full textA series of new tubular catalytic membranes (TCMs) have been prepared and tested in the direct synthesis of H2O2. Such TCMs are
carbon-coated asymmetric α-alumina mesoporous membranes supported on macroporous α-alumina. Pd was introduced by deposition–
precipitation to obtain an even Pd particle distribution inside the membrane pore network. This type of membrane was active in the direct
synthesis of H2O2. Catalytic tests were carried out in a semi-batch recirculating reactor under very mild conditions. Concentrations as high
as 250–300 ppm H2O2 were commonly achieved after 6–7 h on stream, with a particularly high decomposition rate in the presence of H2.
Important features are optimization of the metal deposition procedure and preactivation. To slow down the decomposition and favor the
synthesis of H2O2, a smooth metal particle surface is needed.
2005 Elsevier Inc. All rights reserved
Production of H2O2 by direct synthesis under non-explosive conditions on supported Pd catalysts
No full textFine chemicals with sulphated zirconia: effect of the synthesis variables on the structural fearures and the catalytic activity
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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