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

48 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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title = "Step changes and deactivation behavior in the continuous decarboxylation of stearic acid",

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.",

author = "Madsen, \{Anders Theilgaard\} and Bartosz Rozmysz{\l}owicz and Simakova, \{Irina L.\} and Teuvo Kilpi{\"o} and Leino, \{Anne Riikka\} and Kriszti{\'a}n Kord{\'a}s and Kari Er{\"a}nen and P{\"a}ivi M{\"a}ki-Arvela and Murzin, \{Dmitry Yu\}",

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doi = "10.1021/ie201273n",

language = "English",

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T1 - Step changes and deactivation behavior in the continuous decarboxylation of stearic acid

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

PY - 2011/10/5

Y1 - 2011/10/5

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.

UR - https://www.scopus.com/pages/publications/84860142914

U2 - 10.1021/ie201273n

DO - 10.1021/ie201273n

M3 - Article

AN - SCOPUS:84860142914

SN - 0888-5885

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SP - 11049

EP - 11058

JO - Industrial and Engineering Chemistry Research

JF - Industrial and Engineering Chemistry Research

IS - 19

ER -

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

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