Steam reforming of ethanol over Rh/CeO2/Al2O3 catalysts in a microchannel reactor

Peela, Nageswara Rao; Mubayi, Anamika; Kunzru, Deepak

doi:10.1016/j.cej.2010.09.081

Cited by 55 publications

(20 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The doped catalyst with both promoters (Rh/2.5Ce-15LA) exhibited the lowest carbon deposition rate compared with the others catalysts and with some data reported in literature for similar systems [49,50]. The addition of low CeO 2 loading (2.5%) and high La 2 O 3 loading (15%) to Rh/A catalyst induced important changes in the acid-base properties of the support.…”

Section: Catalystsmentioning

confidence: 56%

Improved ethanol steam reforming on Rh/Al2O3 catalysts doped with CeO2 or/and La2O3: Influence in reaction pathways including coke formation

Osorio-Vargas

Campos

Navarro

et al. 2015

Applied Catalysis A: General

View full text Add to dashboard Cite

Section: Catalystsmentioning

confidence: 56%

Improved ethanol steam reforming on Rh/Al2O3 catalysts doped with CeO2 or/and La2O3: Influence in reaction pathways including coke formation

Osorio-Vargas

Campos

Navarro

et al. 2015

Applied Catalysis A: General

View full text Add to dashboard Cite

“…310 o C could be caused by the formation of rhodium species strongly interacting at defect sites of the support. 20,22 The observed small intensity for rhodium oxide resulted from the limited quantity of Rh. In contrast, 1 showed sharp peaks with a maximum centered at 440 o C, likely attributable to the reduction of NiO (Figure 3, blue).…”

Section: Introductionmentioning

confidence: 99%

“…Upon reduction of Rh/CeO 2 (20 wt %)-Al 2 O 3 , a small peak centered at 200 o C was found, which is attributed to the reduction of rhodium oxide. 20,21 The reduction peak centered at ca. 310 o C could be caused by the formation of rhodium species strongly interacting at defect sites of the support.…”

Section: Introductionmentioning

confidence: 99%

Rh-Ni and Rh-Co Catalysts for Autothermal Reforming of Gasoline

Jung

Lee

Kim

et al. 2014

Bulletin of the Korean Chemical Society

View full text Add to dashboard Cite

Rh doped Ni and Co catalysts, Rh-M/CeO2(20 wt %)-Al2O3 (0.2 wt % of Rh; M = Ni or Co, 20 wt %) were synthesized to produce hydrogen via autothermal reforming (ATR) of commercial gasoline at 700 o C under the conditions of a S/C ratio of 2.0, an O/C ratio of 0.84, and a gas hourly space velocity (GHSV) of 20,000 h 1 . The Rh-Ni/CeO2(20 wt %)-Al2O3 catalyst (1) exhibited excellent activities, with H2 and (H2+CO) yields of 2.04 and 2.58 mol/mol C, respectively. In addition, this catalyst proved to be highly stable over 100 h without catalyst deactivation, as evidenced by energy dispersive spectroscopy (EDX) and elemental analyses. Compared to 1, Rh-Co/CeO2(20 wt %)-Al2O3 catalyst (2) exhibited relatively low stability, and its activity decreased after 57 h. In line with this observation, elemental analyses confirmed that nearly no carbon species were formed at 1 while carbon deposits (10 wt %) were found at 2 following the reaction, which suggests that carbon coking is the main process for catalyst deactivation.

show abstract

“…Kunzru and coworkers [52,58] investigated the steam reforming of ethanol over Rh/CeO 2 /Al 2 O 3 catalysts in a microchannel reactor. The catalyst was coated on a SS304 plate of 1 mm thickness and consisted of 25 microchannels (depth D 400 m, width D 500 m, width of separating fin between channels D 300 m and length D 60 mm) along with inlet and outlet chambers.…”

Section: Steam Reforming Of Ethanolmentioning

confidence: 99%

Microstructured Reactors for Hydrogen Production from Ethanol

Peela

Kunzru

2015

Springer Tracts in Mechanical Engineering

Self Cite

View full text Add to dashboard Cite

The continuously increasing demand for clean and renewable energy warrants the development of renewable, nonpolluting energy resources. Hydrogen is emerging as a natural choice as a more secure and cleaner energy carrier. Fuel cells can be used to produce clean energy from hydrogen, particularly for portable applications. Hydrogen can be produced from a variety of fossil fuel sources, but to decrease the dependence on fossil fuels, hydrogen has to be produced from a renewable source. Hydrogen production from steam reforming of ethanol (a renewable fuel) has emerged as a promising alternative in recent years. For conducting this reaction on board a vehicle, a compact reactor system is required. A microchannel reactor is more efficient and attractive for this purpose, because of the high surface to volume ratio, resulting in high heat and mass transfer rates.The reactions involved in producing CO-free hydrogen from ethanol include steam reforming of ethanol, water-gas shift reaction, and preferential oxidation of carbon monoxide. This chapter discusses the steps involved in the development of a microfuel processor for producing hydrogen from ethanol that include fabrication of the microchannels on the metal substrate, coating of the catalyst and support on the microchannels, assembly of the microchannel reactor, optimization of the catalysts for the three reactions, and, finally, heat integration of the different processes to maximize the efficiency of the fuel processor.

show abstract

Steam reforming of ethanol over Rh/CeO2/Al2O3 catalysts in a microchannel reactor

Cited by 55 publications

References 40 publications

Improved ethanol steam reforming on Rh/Al2O3 catalysts doped with CeO2 or/and La2O3: Influence in reaction pathways including coke formation

Improved ethanol steam reforming on Rh/Al2O3 catalysts doped with CeO2 or/and La2O3: Influence in reaction pathways including coke formation

Rh-Ni and Rh-Co Catalysts for Autothermal Reforming of Gasoline

Microstructured Reactors for Hydrogen Production from Ethanol

Contact Info

Product

Resources

About