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Elaboration of catalysts with silica and silica-alumina matrices

Abstract

The present work is a study of each step of the process of preparation of catalysts with silica and silica-alumina matrices. The influence of operating variables on catalyst texture at each step of the process is analysed. Firstly, it has been necessary to study the textural determinations: a calorimetric method, thermoporometry, has been used. To our knowledge, it is the only technic available for wet materials (hydrogels) and dry materials (xerogels). The first step of the process is silica gelation. This unit operation has a crucial influence on the texture. The strategy of experimental design theory has been employed to underscore the important effect of the following parameters: temperature, pH, silica content in silica hydrogel, silica-alumina ratio. The results are described by a polynomial model, which predicts final product texture. As demonstrated in this work, the other unit operations (filtration, washing, spray-drying) can modify the texture of the solid. 147 refs., 73 figs., 29 tabs., 9 appendices.
Publication Date:
Jul 01, 1992
Product Type:
Thesis/Dissertation
Report Number:
IFP-40036
Reference Number:
SCA: 400201; 020400; PA: FRC-93:000220; SN: 93000922241
Resource Relation:
Other Information: TH: These (D. es Sc.); PBD: Jul 1992
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 02 PETROLEUM; SILICON OXIDES; GELATION; ALUMINIUM OXIDES; CATALYSTS; CHEMICAL PREPARATION; GELS; TEXTURE; POROSITY; HETEROGENEOUS CATALYSIS; CALORIMETRY; TEMPERATURE DEPENDENCE; PH VALUE; MATHEMATICAL MODELS; FILTRATION; WASHING; SPRAY DRYING; CHEMICAL REACTORS; 400201; 020400; CHEMICAL AND PHYSICOCHEMICAL PROPERTIES; PROCESSING
OSTI ID:
10115653
Research Organizations:
Paris-6 Univ., 75 (France); Institut Francais du Petrole (IFP), 92 - Rueil-Malmaison (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
Other: ON: TI93756239; TRN: FR9300220
Availability:
OSTI; NTIS (US Sales Only)
Submitting Site:
FR
Size:
259 p.
Announcement Date:
Jun 30, 2005

Citation Formats

None. Elaboration of catalysts with silica and silica-alumina matrices. France: N. p., 1992. Web.
None. Elaboration of catalysts with silica and silica-alumina matrices. France.
None. 1992. "Elaboration of catalysts with silica and silica-alumina matrices." France.
@misc{etde_10115653,
title = {Elaboration of catalysts with silica and silica-alumina matrices}
author = {None}
abstractNote = {The present work is a study of each step of the process of preparation of catalysts with silica and silica-alumina matrices. The influence of operating variables on catalyst texture at each step of the process is analysed. Firstly, it has been necessary to study the textural determinations: a calorimetric method, thermoporometry, has been used. To our knowledge, it is the only technic available for wet materials (hydrogels) and dry materials (xerogels). The first step of the process is silica gelation. This unit operation has a crucial influence on the texture. The strategy of experimental design theory has been employed to underscore the important effect of the following parameters: temperature, pH, silica content in silica hydrogel, silica-alumina ratio. The results are described by a polynomial model, which predicts final product texture. As demonstrated in this work, the other unit operations (filtration, washing, spray-drying) can modify the texture of the solid. 147 refs., 73 figs., 29 tabs., 9 appendices.}
place = {France}
year = {1992}
month = {Jul}
}