Evaluation of Gold on Alumina Catalyst Deactivation Dynamics during α-Pinene Isomerization Full article
| Conference |
XIX International Conference on Chemical Reactors 05-09 Sep 2010 , Vienna |
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| Journal |
Chemical Engineering Journal
ISSN: 1385-8947 , E-ISSN: 1873-3212 |
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| Output data | Year: 2011, Volume: 176-177, Pages: 42-48 Pages count : 7 DOI: 10.1016/j.cej.2011.03.106 | ||||||||
| Tags | α-Pinene, Camphene, Deactivation modeling, Gold catalyst, Isomerization, UV-vis in situ | ||||||||
| Authors |
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| Affiliations |
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Funding (4)
| 1 | Russian Foundation for Basic Research | 08-03-91758 |
| 2 | National Autonomous University of Mexico | IN 224510 |
| 3 | National Autonomous University of Mexico | |
| 4 | Russian Science Support Foundation |
Abstract:
Synthesis of camphene is an important step in an industrial process for camphor production from α-pinene. Compared to conventional way of α-pinene to camphene transformation over acid-hydrated TiO2, gold on alumina catalyst was found to provide α-pinene isomerization conversion up to 99.9% and selectivity 60–80% making this catalyst very promising from an industrial viewpoint. However, deactivation of gold catalyst might be a serious obstacle for real industrial implementation. According to TPO and UV–vis-mass in situ it was shown that deactivation is caused by adsorption of hydrocarbons on the gold species. The dynamics of catalyst deactivation during α-pinene isomerization was presented based on a so-called “separable” deactivation model assumption. Effects of isomerization temperature, initial α-pinene concentration and gas atmosphere on catalyst deactivation with time-on-stream were investigated experimentally and correlated with the proposed deactivation function. The results showed that the α-pinene concentration was the major factor governing the deactivation of Au/γ-Al2O3 catalyst under substrate-feeding conditions. When the α-pinene concentration was controlled at a relatively low level such as 0.4 vol.%, especially in hydrogen atmosphere, the total deactivation rate was negligible. An equation of the reaction rate taking into account the catalyst deactivation was suggested making prediction of deactivation behavior in α-pinene conversion at different initial concentrations.
Cite:
Solkina Y.S.
, Reshetnikov S.I.
, Estrada M.
, Simakov A.
, Murzin D.Y.
, Simakova I.L.
Evaluation of Gold on Alumina Catalyst Deactivation Dynamics during α-Pinene Isomerization
Chemical Engineering Journal. 2011. V.176-177. P.42-48. DOI: 10.1016/j.cej.2011.03.106 WOS Scopus РИНЦ ANCAN OpenAlex
Evaluation of Gold on Alumina Catalyst Deactivation Dynamics during α-Pinene Isomerization
Chemical Engineering Journal. 2011. V.176-177. P.42-48. DOI: 10.1016/j.cej.2011.03.106 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Dec 23, 2010 |
| Accepted: | Mar 30, 2011 |
| Published online: | May 19, 2011 |
| Published print: | Dec 1, 2011 |
Identifiers:
| Web of science: | WOS:000298900200007 |
| Scopus: | 2-s2.0-81555203481 |
| Elibrary: | 20520141 |
| Chemical Abstracts: | 2011:1493073 |
| Chemical Abstracts (print): | 155:639265 |
| OpenAlex: | W2073875001 |