Kinetics, Catalyst Deactivation and Modeling in the Hydrogenation of β-Sitosterol to β-Sitostanol over Microporous and Mesoporous Carbon Supported Pd Catalysts Full article
Conference |
XVIII International Conference on Chemical Reactors 29 Sep - 3 Oct 2008 , Valletta |
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Journal |
Chemical Engineering Journal
ISSN: 1385-8947 , E-ISSN: 1873-3212 |
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Output data | Year: 2009, Volume: 154, Number: 1-3, Pages: 45-51 Pages count : 7 DOI: 10.1016/j.cej.2009.01.022 | ||||
Tags | Catalyst potential, Deactivation, Mesoporous carbon, Modeling, Sitosterol | ||||
Authors |
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Abstract:
Kinetics of the hydrogenation of β-sitosterol to β-sitostanol is of industrial interest, since the desired product is used for suppressing cholesterol absorption in human body. The main drawback when using microporous Pd/C catalyst in this reaction is catalyst deactivation. In the current work the performance of microporous and mesoporous Pd catalysts in the hydrogenation of β-sitosterol was compared. The catalytic hydrogenations were performed in a shaking batch reactor in 1-propanol as a solvent. With larger amounts of catalyst less catalyst deactivation occurred due to the fact that the catalyst support acted also as an adsorbent. The mesoporous 4 wt.% Pd/C (Sibunit) catalyst showed higher sitosterol conversions and less catalyst deactivation compared to a microporous 5 wt.% Pd/C catalyst. The kinetics of the hydrogenation of β-sitosterol to β-sitostanol was studied over 4 wt.% Pd/C (Sibunit) catalyst at different temperatures between 60 °C and 80 °C and by reusing the catalyst. The origin for catalyst deactivation was poisoning by phosphorus and sulphur, as well as coking. In situ catalyst potential measurements showed that there is a correlation between catalyst deactivation and decreasing catalyst potential with increasing sitosterol conversion. A mechanistic kinetic model including a deactivation factor was successfully applied to this reaction and the kinetic parameters were determined.
Cite:
Maki-Arvela P.
, Martin G.
, Simakova I.
, Tokarev A.
, Warna J.
, Hemming J.
, Holmbom B.
, Salmi T.
, Murzin D.Y.
Kinetics, Catalyst Deactivation and Modeling in the Hydrogenation of β-Sitosterol to β-Sitostanol over Microporous and Mesoporous Carbon Supported Pd Catalysts
Chemical Engineering Journal. 2009. V.154. N1-3. P.45-51. DOI: 10.1016/j.cej.2009.01.022 WOS Scopus РИНЦ
Kinetics, Catalyst Deactivation and Modeling in the Hydrogenation of β-Sitosterol to β-Sitostanol over Microporous and Mesoporous Carbon Supported Pd Catalysts
Chemical Engineering Journal. 2009. V.154. N1-3. P.45-51. DOI: 10.1016/j.cej.2009.01.022 WOS Scopus РИНЦ
Dates:
Submitted: | Nov 27, 2008 |
Accepted: | Jan 14, 2009 |
Published online: | Jan 22, 2009 |
Published print: | Nov 15, 2009 |
Identifiers:
Web of science | WOS:000274348700007 |
Scopus | 2-s2.0-75149131094 |
Elibrary | 20545344 |
Chemical Abstracts | 2009:1511486 |
Chemical Abstracts (print) | 152:169196 |
OpenAlex | W2027353243 |