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Title: Learning from the past: Are catalyst design principles transferrable between hydrodesulfurization and deoxygenation?

Journal Article · · AIChE Journal
DOI:https://doi.org/10.1002/aic.16151· OSTI ID:1656953

Molybdenum-oxide (MoO3) is a promising catalyst candidate for hydrodeoxygenation (HDO) of pyrolysis vapor or liquefaction products to renewable fuels or value-added chemicals. Density functional theory is used to study the mechanism and active site requirements for HDO of furan over the MoO3(010) facet and contrast our results with prior work on hydrodesulfurization (HDS) of thiophene over MoS2 model catalysts. The potential energy diagram for HDO over a realistically terminated MoO3(010) surface facet reveals that the elementary reaction steps for deoxygenation are facile, but the formation of oxygen-vacancies is slow and endothermic. In general, HDO over MoO3 and HDS over MoS2 exhibit mechanistic similarities, which suggests that knowledge transfer from the mature HDS system to the emerging field of HDO catalysis is possible. For instance, transition metal promotion of MoO3 resulted in an improvement of the kinetics and thermodynamics of oxygen vacancy formation, similar to Co and Ni promotion of MoS2.

Research Organization:
Univ. of Houston, TX (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
SC0011983; AC02-05CH11231; AC02-06CH11357; ACI5681053575; ACI-1531814
OSTI ID:
1656953
Alternate ID(s):
OSTI ID: 1429534
Journal Information:
AIChE Journal, Vol. 64, Issue 8; ISSN 0001-1541
Publisher:
American Institute of Chemical EngineersCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

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  • JÓNsson, Hannes; Mills, Greg; Jacobsen, Karsten W.
  • Proceedings of the International School of Physics, Classical and Quantum Dynamics in Condensed Phase Simulations https://doi.org/10.1142/9789812839664_0016
conference November 2011
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