Step Changes and Deactivation Behavior in the Continuous Decarboxylation of Stearic Acid

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

Department of Chemistry

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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% H2 atmosphere, with 95% conversion of 10 mol % dilute stearic acid in dodecane and 12% conversion of pure stearic acid. Deactivation took place in H2-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
Journal	Industrial & Engineering Chemistry Research
Volume	50
Issue number	19
Pages (from-to)	11049-11058
ISSN	0888-5885
DOIs	https://doi.org/10.1021/ie201273n
Publication status	Published - 2011

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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\% H2 atmosphere, with 95\% conversion of 10 mol \% dilute stearic acid in dodecane and 12\% conversion of pure stearic acid. Deactivation took place in H2-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 Rozmys{\l}owicz and Simakova, \{Irina L.\} and Teuvo Kilpi{\"o} and Anne-Riikka Leino and Kriszti{\'a}n Kord{\'a}s and Kari Er{\"a}nen and P{\"a}ivi M{\"a}ki-Arvela and Murzin, \{Dmitry Yu.\}",

year = "2011",

doi = "10.1021/ie201273n",

language = "English",

volume = "50",

pages = "11049--11058",

journal = "Industrial \& Engineering Chemistry Research",

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TY - JOUR

T1 - Step Changes and Deactivation Behavior in the Continuous Decarboxylation of Stearic Acid

AU - Madsen, Anders Theilgaard

AU - Rozmysłowicz, 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

Y1 - 2011

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% H2 atmosphere, with 95% conversion of 10 mol % dilute stearic acid in dodecane and 12% conversion of pure stearic acid. Deactivation took place in H2-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% H2 atmosphere, with 95% conversion of 10 mol % dilute stearic acid in dodecane and 12% conversion of pure stearic acid. Deactivation took place in H2-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.

U2 - 10.1021/ie201273n

DO - 10.1021/ie201273n

M3 - Journal article

SN - 0888-5885

VL - 50

SP - 11049

EP - 11058

JO - Industrial & Engineering Chemistry Research

JF - Industrial & Engineering Chemistry Research

IS - 19

ER -

Step Changes and Deactivation Behavior in the Continuous Decarboxylation of Stearic Acid

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