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Development of Bifunctional Hydrodeoxygenation Catalyst Rh‐HY for the Generation of Biomass‐Derived High‐Energy‐Density Fuels
Author(s) -
Granados Fócil Andrés A.,
Granados Fócil Sergio,
Conde Sotelo Víctor M.,
Grimm Ronald Lionel,
González García Federico,
Rojas Santiago Eleazar,
Santolalla Vargas Carlos E.,
Vera Ramírez Marco A.,
de los Reyes Heredia José Antonio
Publication year - 2019
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201801112
Subject(s) - hydrodeoxygenation , chemistry , anisole , thermal desorption spectroscopy , guaiacol , catalysis , rhodium , cyclohexanone , inorganic chemistry , organic chemistry , desorption , selectivity , adsorption
Liquid‐phase hydrodeoxygenation (HDO) of phenol, anisole, and guaiacol over rhodium‐doped, high‐silica content zeolite catalysts (Si/Al = 15), HY, is investigated in a high‐pressure‐fixed bed reactor. These catalysts are characterized by inductively coupled plasma optical emission spectrometry, scanning electron microscopy with energy‐dispersive spectroscopy, thermogravimetric analysis, X‐ray diffraction, N 2 physisorption, ammonia temperature‐programmed desorption, temperature‐programmed oxidation, temperature‐programmed reduction, 27 Al magic angle spinning nuclear magnetic resonance, and X‐ray photoelectron spectroscopy. The effects of reaction temperature (150–250 °C) and weight hourly space velocity (WSHV = 1.0–2.8 h −1 ) on activity, stability, and product distribution are investigated. The main products obtained from HDO reactions are methylcyclopentane, cyclohexane, methylcyclohexane, and bicyclohexyl. Cyclohexanone is the most abundant oxygenated product along with deactivation. For all tested catalysts, increasing the reaction temperature up to 250 °C improves the HDO reactions without significant activity or selectivity loss. Higher rhodium loading extends the catalyst life and increases the activity and cyclohexane selectivity for the guaiacol feed. The experiments indicate that anisole, phenol, and guaiacol undergo aromatic hydrogenation on rhodium particles first, followed by deoxygenation on the acid sites over zeolite combined with additional hydrogenation.