Abstract
A series of Rh catalysts on various supports (Al2O3, MgAl2O4, ZrO2, and ZrO2–CeO2) 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 H2 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.
Similar content being viewed by others
References
Rostrup-Nielsen JR (1984) In: Anderson JR, Boudart M (eds) Catalysis, science and technology, vol 5. Springer, Berlin, p 1
Cao C, Xia G, Holladay J, Jones E, Wang Y (2004) Appl Catal A 262:19
Song CS (2002) Catal Today 77:17
Velu S, Suzuki K (2003) Topics Catal 22:235
Huber GW, Shabaker JW, Dumesic JA (2003) Science 300:2075
Cortright RD, Davda RR, Dumesic JA (2002) Nature 418:964
Deluga GA, Salge JR, Schmidt LD, Verykios XE (2004) Science 303:993
Kugai J, Velu S, Song C (2005) Catal Lett 101:255
Llorca J, Piscina de la PR, Dalmon JA, Sales J, Homs N (2003) Appl Catal B 43:355
Velu S, Satoh N, Gopinath CS, Suzuki K (2002) Catal Lett 82:145
Liguras DK, Kondarides DI, Verykios XE (2003) Appl Catal B 43:345
Breen JP, Burch R, Coleman HM (2002) Appl Catal B 39:65
Vasudeva K, Mitra N, Umasankar P, Dhingra SC (1996) Int J Hyrogen Energy 21:13
Fishtik I, Alexander A, Datta R, Geana D (2000) Int J Hyrogen Energy 25:31
Freni S, Maggio G, Cavallaro S (1996) J Power Sources 62:67
Tsiakaras P, Demin A (2001) J Power Sources 102:210
Trovarelli A, de Leitenburg C, Boaro M, Dolcetti G (2000) Catal Today 50:353
Trovarelli A (1996) Catal Rev-Sci Eng 38:439
Kaspar J, Fornasiero P, Graziani M (1999) Catal Today 50:285
Rossignol S, Gerard F, Duprez D (1999) J Mater Chem 9:1615
Thammachart M, Meeyoo V, Risksomboon T, Osuwan S (2001) Catal Today 68:53
Roh H-S, Jun K-W, Dong W-S, Park S-E, Baek Y-S (2001) Catal Lett 74:31
Roh H-S, Jun K-W, Dong W-S, Chang J-S, Park S-E, Joe Y-I (2002) J Mol Catal A 181:137
Potdar HS, Roh H-S, Jun K-W, Ji M, Liu Z-W (2002) Catal Lett 84:95
Roh H-S, Potdar HS, Jun K-W, Kim J-W, Oh Y-S (2004) Appl Catal A 276:231
Roh H-S, Potdar HS, Jun K-W (2004) Catal Today 93–95:39
Diagne C, Idriss H, Kiennemann A (2002) Catal Commun 3:565
Diagne C, Idriss H, Pearson K, Gomez-Garcia MA, Kiennemann A (2004) C R Chimie 7:617
Palo DR, Holladay JD, Rozmiarek RT, Guzman-Leong CE, Wang Y, Hu J, Chin Y-H, Dagle RA, Baker EG (2002) J Power Sources 108:28
Dall’Agnol C, Gervasini A, Morazzoni F, Pinna F, Strukul G, Zanderighi L (1985) J Catal 96:106
Jozwiak WK (1986) React Kinet Catal Lett 30:345
Cavallaro S (2000) Energy Fuels 14:1195
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.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Roh, HS., Wang, Y. & King, D.L. Selective Production of H2 from Ethanol at Low Temperatures over Rh/ZrO2–CeO2 Catalysts. Top Catal 49, 32–37 (2008). https://doi.org/10.1007/s11244-008-9066-3
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11244-008-9066-3