Selective production of H2 from ethanol at low temperatures over Rh/ZrO2-CeO2 catalysts

Hyun Seog Roh; Yong Wang; David L. King

doi:10.1007/s11244-008-9066-3

Selective production of H₂ from ethanol at low temperatures over Rh/ZrO₂-CeO₂ catalysts

Hyun Seog Roh, Yong Wang, David L. King

Division of Environmental Engineering

Research output: Contribution to journal › Article › peer-review

49 Citations (Scopus)

Abstract

A series of Rh catalysts on various supports (Al₂O₃, MgAl₂O₄, ZrO₂, and ZrO₂-CeO ₂) have been applied to H₂ production from the ethanol steam reforming reaction. In terms of ethanol conversion at low temperatures (below 450 °C) with 1wt% Rh catalysts, the activity decreases in the order: Rh/ZrO₂-CeO₂ > Rh/Al₂O₃ > Rh/MgAl₂O₄ > Rh/ZrO₂. Support plays a very important role on product selectivity at low temperatures (below 450 °C). Acidic or basic supports favor ethanol dehydration, while ethanol dehydrogenation is favored over neutral supports at low temperatures. The Rh/ZrO₂-CeO₂ catalyst exhibits the highest CO₂ selectivity up to 550 °C, which is due to the highest water gas shift (WGS) activity at low temperatures. Among the catalysts evaluated in this study, the 2wt% Rh/ZrO₂-CeO₂ catalyst exhibited the highest H ₂ yield at 450 °C, which is possibly due to the high oxygen storage capacity of ZrO₂-CeO₂ resulting in efficient transfer of mobile oxygen species from the H₂O molecule to the reaction intermediate.

Original language	English
Pages (from-to)	32-37
Number of pages	6
Journal	Topics in Catalysis
Volume	49
Issue number	1-2
DOIs	https://doi.org/10.1007/s11244-008-9066-3
Publication status	Published - 2008 Jul

Bibliographical note

Funding Information:
Acknowledgements This work was supported by Department of Energy’s Office of Hydrogen, Fuel Cells, and Infrastructure Technologies. Most of work was performed in the Environmental Molecular Science Laboratory, a national scientific user facility sponsored by the U.S. Department of Energy’s Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory in Richland, WA.

All Science Journal Classification (ASJC) codes

Catalysis
Chemistry(all)

Access to Document

10.1007/s11244-008-9066-3

Cite this

@article{3a15ec6beada42a5a2380939dcbbc7eb,

title = "Selective production of H2 from ethanol at low temperatures over Rh/ZrO2-CeO2 catalysts",

abstract = "A series of Rh catalysts on various supports (Al2O3, MgAl2O4, ZrO2, and ZrO2-CeO 2) have been applied to H2 production from the ethanol steam reforming reaction. In terms of ethanol conversion at low temperatures (below 450 °C) with 1wt% Rh catalysts, the activity decreases in the order: Rh/ZrO2-CeO2 > Rh/Al2O3 > Rh/MgAl2O4 > Rh/ZrO2. Support plays a very important role on product selectivity at low temperatures (below 450 °C). Acidic or basic supports favor ethanol dehydration, while ethanol dehydrogenation is favored over neutral supports at low temperatures. The Rh/ZrO2-CeO2 catalyst exhibits the highest CO2 selectivity up to 550 °C, which is due to the highest water gas shift (WGS) activity at low temperatures. Among the catalysts evaluated in this study, the 2wt% Rh/ZrO2-CeO2 catalyst exhibited the highest H 2 yield at 450 °C, which is possibly due to the high oxygen storage capacity of ZrO2-CeO2 resulting in efficient transfer of mobile oxygen species from the H2O molecule to the reaction intermediate.",

author = "Roh, {Hyun Seog} and Yong Wang and King, {David L.}",

note = "Funding Information: Acknowledgements This work was supported by Department of Energy{\textquoteright}s Office of Hydrogen, Fuel Cells, and Infrastructure Technologies. Most of work was performed in the Environmental Molecular Science Laboratory, a national scientific user facility sponsored by the U.S. Department of Energy{\textquoteright}s Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory in Richland, WA.",

year = "2008",

month = jul,

doi = "10.1007/s11244-008-9066-3",

language = "English",

volume = "49",

pages = "32--37",

journal = "Topics in Catalysis",

issn = "1022-5528",

publisher = "Springer Netherlands",

number = "1-2",

}

TY - JOUR

T1 - Selective production of H2 from ethanol at low temperatures over Rh/ZrO2-CeO2 catalysts

AU - Roh, Hyun Seog

AU - Wang, Yong

AU - King, David L.

N1 - Funding Information: Acknowledgements This work was supported by Department of Energy’s Office of Hydrogen, Fuel Cells, and Infrastructure Technologies. Most of work was performed in the Environmental Molecular Science Laboratory, a national scientific user facility sponsored by the U.S. Department of Energy’s Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory in Richland, WA.

PY - 2008/7

Y1 - 2008/7

N2 - A series of Rh catalysts on various supports (Al2O3, MgAl2O4, ZrO2, and ZrO2-CeO 2) have been applied to H2 production from the ethanol steam reforming reaction. In terms of ethanol conversion at low temperatures (below 450 °C) with 1wt% Rh catalysts, the activity decreases in the order: Rh/ZrO2-CeO2 > Rh/Al2O3 > Rh/MgAl2O4 > Rh/ZrO2. Support plays a very important role on product selectivity at low temperatures (below 450 °C). Acidic or basic supports favor ethanol dehydration, while ethanol dehydrogenation is favored over neutral supports at low temperatures. The Rh/ZrO2-CeO2 catalyst exhibits the highest CO2 selectivity up to 550 °C, which is due to the highest water gas shift (WGS) activity at low temperatures. Among the catalysts evaluated in this study, the 2wt% Rh/ZrO2-CeO2 catalyst exhibited the highest H 2 yield at 450 °C, which is possibly due to the high oxygen storage capacity of ZrO2-CeO2 resulting in efficient transfer of mobile oxygen species from the H2O molecule to the reaction intermediate.

AB - A series of Rh catalysts on various supports (Al2O3, MgAl2O4, ZrO2, and ZrO2-CeO 2) have been applied to H2 production from the ethanol steam reforming reaction. In terms of ethanol conversion at low temperatures (below 450 °C) with 1wt% Rh catalysts, the activity decreases in the order: Rh/ZrO2-CeO2 > Rh/Al2O3 > Rh/MgAl2O4 > Rh/ZrO2. Support plays a very important role on product selectivity at low temperatures (below 450 °C). Acidic or basic supports favor ethanol dehydration, while ethanol dehydrogenation is favored over neutral supports at low temperatures. The Rh/ZrO2-CeO2 catalyst exhibits the highest CO2 selectivity up to 550 °C, which is due to the highest water gas shift (WGS) activity at low temperatures. Among the catalysts evaluated in this study, the 2wt% Rh/ZrO2-CeO2 catalyst exhibited the highest H 2 yield at 450 °C, which is possibly due to the high oxygen storage capacity of ZrO2-CeO2 resulting in efficient transfer of mobile oxygen species from the H2O molecule to the reaction intermediate.

UR - http://www.scopus.com/inward/record.url?scp=48949120194&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=48949120194&partnerID=8YFLogxK

U2 - 10.1007/s11244-008-9066-3

DO - 10.1007/s11244-008-9066-3

M3 - Article

AN - SCOPUS:48949120194

SN - 1022-5528

VL - 49

SP - 32

EP - 37

JO - Topics in Catalysis

JF - Topics in Catalysis

IS - 1-2

ER -