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

Anders Theilgaard Madsen; B. Rozmyslowicz; I. Simakova; T. T. Kilpiö; A.-R. Leino; K. Kordás; K. Eränen; P. Mäki-Arvela; D. Y. Murzin

doi:10.1021/le201273n

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

Anders Theilgaard Madsen, B. Rozmyslowicz, I. Simakova, T. T. Kilpiö, A.-R. Leino, K. Kordás, K. Eränen, P. Mäki-Arvela, D. Y. Murzin

Department of Chemistry

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Deoxygenation of dilute and concentrated stearic acid over 2% Pd/C beads was performed in a continuous reactor at 300 degrees C and 20 bar pressure of Ar or 5% H-2/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
Journal	Industrial & Engineering Chemistry Research
Volume	50
Issue number	19
Pages (from-to)	11049-11058
ISSN	0888-5885
DOIs	https://doi.org/10.1021/le201273n
Publication status	Published - 2011

Access to Document

10.1021/le201273n

OpenUrl availability

Full text

Cite this

@article{ef0d9dd2d462430598ca1c8bb9397cb7,

title = "Step changes and deactivation behaviour 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 degrees C and 20 bar pressure of Ar or 5% H-2/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 B. Rozmyslowicz and I. Simakova and Kilpi{\"o}, {T. T.} and A.-R. Leino and K. Kord{\'a}s and K. Er{\"a}nen and P. M{\"a}ki-Arvela and Murzin, {D. Y.}",

year = "2011",

doi = "10.1021/le201273n",

language = "English",

volume = "50",

pages = "11049--11058",

journal = "Industrial & Engineering Chemistry Research",

issn = "0888-5885",

publisher = "American Chemical Society",

number = "19",

}

TY - JOUR

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

AU - Madsen, Anders Theilgaard

AU - Rozmyslowicz, B.

AU - Simakova, I.

AU - Kilpiö, T. T.

AU - Leino, A.-R.

AU - Kordás, K.

AU - Eränen, K.

AU - Mäki-Arvela, P.

AU - Murzin, D. Y.

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 degrees C and 20 bar pressure of Ar or 5% H-2/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 degrees C and 20 bar pressure of Ar or 5% H-2/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.

U2 - 10.1021/le201273n

DO - 10.1021/le201273n

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 behaviour in the continuous decarboxylation of stearic acid

Abstract

Access to Document

OpenUrl availability

Fingerprint

Cite this