Relevant aspects of the conversion of guaiacol as a model compound for bio-oil over supported molybdenum oxycarbide catalysts

Molybdenum supported over activated carbon has been carburized under carbothermal hydrogen reduction conditions at different temperatures in order to modify the carburization degree. The resulting catalysts were characterized by N 2 physisorption, CO chemisorption, XPS, TPR, and TPD-NH 3 and compare...

Full description

Saved in:
Bibliographic Details
Published in:New journal of chemistry 2020-07, Vol.44 (28), p.1227-1235
Main Authors: Blanco, Elodie, Aguirre-Abarca, Diego A, Díaz de León, J. Noé, Escalona, Néstor
Format: Article
Language:English
Subjects:
Activated carbon
Ammonia
Benzene
Carbon monoxide
Carburization (corrosion)
Carburizing
Catalysts
Catechol
Chemisorption
Hydrogen reduction
Hydrogen storage
Hydrogenolysis
Molybdenum
Oxycarbides
Transalkylation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Molybdenum supported over activated carbon has been carburized under carbothermal hydrogen reduction conditions at different temperatures in order to modify the carburization degree. The resulting catalysts were characterized by N 2 physisorption, CO chemisorption, XPS, TPR, and TPD-NH 3 and compared in the hydrodeoxygenation of guaiacol in a batch reactor as a lignin-derived model compound. The results have shown that the CO produced during the TPR could be related to the CO chemisorbed and the carburization degree of the material. The carburization degree was shown to increase with the final temperature, and under such conditions, two different Mo species, Mo 4+ and Mo 3+ , were identified in the oxycarbide phase. Catalytic results showed that the Mo 2 C is less active than the oxycarbide MoO x C y phase. Mo 2 C showed to improvement in the transalkylation reactions while in the case of MoO x C y , Mo 4+ promotes the hydrogenolysis of catechol to benzene while the Mo 3+ species was shown to activate hydrogenation reactions. Molybdenum supported over activated carbon has been carburized under carbothermal hydrogen reduction conditions at different temperatures in order to modify the carburization degree and evaluated for guaiacol conversion.
ISSN:1144-0546
1369-9261
DOI:10.1039/d0nj02531c