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

doi:10.1021/ie201273n

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 journal › Article › Scientific › peer-review

44 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 language	English
Pages (from-to)	11049-11058
Number of pages	10
Journal	Industrial and Engineering Chemistry Research
Volume	50
Issue number	19
DOIs	https://doi.org/10.1021/ie201273n
Publication status	Published - 5 Oct 2011
MoE publication type	A1 Journal article-refereed

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10.1021/ie201273n

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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.",

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AU - Madsen, Anders Theilgaard

AU - Rozmyszłowicz, Bartosz

AU - Simakova, Irina L.

AU - Kilpiö, Teuvo

AU - Leino, Anne Riikka

AU - Kordás, Krisztián

AU - Eränen, Kari

AU - Mäki-Arvela, Päivi

AU - Murzin, Dmitry Yu

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N2 - 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.

AB - 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.

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

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