Path lumping kinetic model for aqueous phase reforming of sorbitol

Authors:  Farid Aiouache, Lisa McAleer, Quan Gan, Ala’a H. Al-Muhtaseb, Mohammad N. Ahmad

Abstract:
This workpresents a kineticmodelfor the aqueousphase reforming of sorbitolthatuses a lumping scheme of intermediates and approximates the complex path to gas products via a reforming route and liquid oxygenate route including hydrodeoxygenation, decarbonylation and dehydrogenation reactions. The model was tested at temperatures ranging from 473K to 523K, using monometallic Ni and bimetallic NiPd catalysts supported on -Al₂O₃, ZrO₂ and CeO₂. The model revealed that the relevant competing paths were a function of the composition of catalyst and the conversion to the carbon gaseous products. Paths of reforming and CO₂ methanation were more important than decarbonylation and hydrodeoxygenation at small conversions for all catalysts whereas the hydrodeoxygenation–decarbonylation towards alkanes release was more competitive than the reforming at high conversions with Ni/Al₂O₃ and NiPd catalysts supported on ZrO₂ and CeO₂ but was still less competitive with Ni-Pd catalyst supported on -Al₂O₃.

Keywords:
Sorbitol
Kinetics
Aqueous phase reforming
Lumping scheme
Catalyst
Biofuel

Published in: Applied catalysis A: General  (Volume 466, Pages 1-314, 10 September 2013)

Publisher: Elsevier  

ISSN Information: 0926-860X

Path lumping kinetic model for aqueous phase reforming of sorbitol

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