Step changes and deactivation behavior in the continuous decarboxylation of stearic acid

Anders Theilgaard Madsen, Bartosz Rozmyszłowicz, Irina L. Simakova, Teuvo Kilpiö, Anne Riikka Leino, Krisztián Kordás, Kari Eränen, Päivi Mäki-Arvela, Dmitry Yu Murzin*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

39 Citations (Scopus)

Abstract

Deoxygenation of dilute and concentrated stearic acid over 2% Pd/C beads was performed in a continuous reactor at 300 °C and 20 bar pressure of Ar or 5%H2/Ar. Stable operation was obtained in 5%H 2 atmosphere, with 95% conversion of 10 mol % dilute stearic acid in dodecane and 12% conversion of pure stearic acid. Deactivation took place in H 2-deficient gas atmosphere, probably as a result of the formation of unsaturated products and coking in the pore system. Transient experiments with step changes were performed: 1 h was required for the step change to be visible in liquid sampling,whereas steady states were achieved after a total of 2.5-3 h. Postreaction analysis of the spent catalyst revealed that a deactivation profile was formed downward over the catalyst bed.

Original languageEnglish
Pages (from-to)11049-11058
Number of pages10
JournalIndustrial and Engineering Chemistry Research
Volume50
Issue number19
DOIs
Publication statusPublished - 5 Oct 2011
MoE publication typeA1 Journal article-refereed

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