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*

*Korresponderande författare för detta arbete

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

39 Citeringar (Scopus)

Sammanfattning

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.

OriginalspråkEngelska
Sidor (från-till)11049-11058
Antal sidor10
TidskriftIndustrial and Engineering Chemistry Research
Volym50
Utgåva19
DOI
StatusPublicerad - 5 okt 2011
MoE-publikationstypA1 Tidskriftsartikel-refererad

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