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1. |
The Distribution of Active ingredients in Supported Catalysts Prepared by Impregnation |
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Catalysis Reviews,
Volume 27,
Issue 2,
1985,
Page 207-340
Sheng-Yi Lee,
Rutherford Aris,
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摘要:
Supported catalysts, one of the commonest forms of heterogeneous catalysts in practical use, consist of small crystallites of a catalytically active component dispersed in a porous support of high surface area. Impregnation of the support with an aqueous solution of a compound containing the appropriate catalytic component is an important and frequently used method of preparing this type of catalyst. A nonaqueous solution should be used if the sup port surface is hydrophobic or if hydrolysis of the support surface is to be avoided. In its simplest form, this impregnation method involves three steps: (1) contacting the support with impregnating solution for a certain period of time, (2) drying the support to remove the imbibed liquid, and (3) activating the catalyst by calcination, reduction, or other appropriate treatment.
ISSN:0161-4940
DOI:10.1080/01614948508064737
出版商:Taylor & Francis Group
年代:1985
数据来源: Taylor
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2. |
Design and Preparation of Impregnated Catalysts |
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Catalysis Reviews,
Volume 27,
Issue 2,
1985,
Page 341-372
Masaharu Komiyama,
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PDF (1525KB)
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摘要:
Solid catalysts in common use are typically in the form of small metal crystallites dispersed on the internal surface of the porous support. Advantages of these supported-metal catalysts lie in their high surface-to-volume ratio and the high thermal stability endowed by the dispersion. Such catalysts are commonly produced by liquid-phase impregnation in which a dry or wet pellet of the porous support is impregnated with a solution of a compound of the desired catalytic constituent. During impregnation and subsequent drying, small crystallites of the catalyst precursors are deposited on the internal surface of the support material. The impregnation and drying steps involve mass and /or heat transfer processes which often do not reach equilibrium, resulting in nonuniform concentration profiles of impregnant, or “impregnation profiles” along the radius of the support pellet.
ISSN:0161-4940
DOI:10.1080/01614948508064738
出版商:Taylor & Francis Group
年代:1985
数据来源: Taylor
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3. |
Editorial board page for “Catalysis Reviews Science and Engineering”, Volume 27, Number 2 |
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Catalysis Reviews,
Volume 27,
Issue 2,
1985,
Page -
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PDF (54KB)
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摘要:
This is a scanned image of the original Editorial Board page(s) for this issue.
ISSN:0161-4940
DOI:10.1080/01614948508064736
出版商:Taylor & Francis Group
年代:1985
数据来源: Taylor
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