TY - JOUR
T1 - Adsorptive desulfurization of jet fuels over TiO2-CeO2 mixed oxides
T2 - Role of surface Ti and Ce cations
AU - Watanabe, Shingo
AU - Ma, Xiaoliang
AU - Song, Chunshan
N1 - Funding Information:
The authors gratefully acknowledge the support of this work in part by the U.S. Office of Naval Research and by US Environmental Protection Agency-US National Science Foundation through the NSF-EPA joint TSE program. We thank the ONR Navsea program manager Donald Hoffman and John Heinzel for their support and encouragement. We also thank Bob Hengstebek, Vince Bojan, and Magda N. Salama of Penn State for their technical support for analytical instrumentation.
PY - 2020
Y1 - 2020
N2 - A Ti0.9Ce0.1O2 oxide-based adsorbent with high surface area mesopores was studied for adsorptive desulfurization of jet fuel (JP-5: 1055 ppm-w of sulfur) using several techniques, including GC-PFPD, N2 adsorption-desorption, XRD, XPS and TPD. Ti0.9Ce0.1O2 oxide-based adsorbent effectively adsorbed sulfur and achieved the sulfur reduction of the jet fuel from 1055 ppm-w to lower than 1 ppm-w in multiple cycles of adsorption in a fixed-bed flow system. The spent adsorbent can be regenerated in-situ at the elevated temperature by using air. Some of the sulfur atom in the organic sulfur compounds could be oxidized to form sulfate species by reaction with the surface active oxygen species, while the surface (Ti4+, Ce4+) cations of adsorbent were reduced simultaneously upon adsorption of the sulfur compounds. The formed sulfate species were further removed from the surface during the oxidative regeneration step under an air flow. The deactivation of the adsorbent was potentially caused by sintering and metal cation migration on the surface.
AB - A Ti0.9Ce0.1O2 oxide-based adsorbent with high surface area mesopores was studied for adsorptive desulfurization of jet fuel (JP-5: 1055 ppm-w of sulfur) using several techniques, including GC-PFPD, N2 adsorption-desorption, XRD, XPS and TPD. Ti0.9Ce0.1O2 oxide-based adsorbent effectively adsorbed sulfur and achieved the sulfur reduction of the jet fuel from 1055 ppm-w to lower than 1 ppm-w in multiple cycles of adsorption in a fixed-bed flow system. The spent adsorbent can be regenerated in-situ at the elevated temperature by using air. Some of the sulfur atom in the organic sulfur compounds could be oxidized to form sulfate species by reaction with the surface active oxygen species, while the surface (Ti4+, Ce4+) cations of adsorbent were reduced simultaneously upon adsorption of the sulfur compounds. The formed sulfate species were further removed from the surface during the oxidative regeneration step under an air flow. The deactivation of the adsorbent was potentially caused by sintering and metal cation migration on the surface.
UR - http://www.scopus.com/inward/record.url?scp=85089870876&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85089870876&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2020.07.071
DO - 10.1016/j.cattod.2020.07.071
M3 - Article
AN - SCOPUS:85089870876
JO - Catalysis Today
JF - Catalysis Today
SN - 0920-5861
ER -