Hydrogen production from steam reforming of ethanol using a ceria-supported iridium catalyst: Effect of different ceria supports

Siang, Jia-Yi; Lee, Chia-Chan; Wang, Chi-Han; Wang, Wen-Tza; Deng, Chi-Yang; Yeh, C.L.

doi:10.1016/j.ijhydene.2010.01.067

Cited by 55 publications

(30 citation statements)

References 31 publications

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“…The amount of H 2 consumed (114-132 lmol/g) was found to be slightly higher compared to the theoretical value for the reduction of IrO 2 to Ir (104 lmol/g), most possibly due to partial reduction of the gadolinium oxide species and/or the ceria support, in agreement with previous studies [61,62,64,65]. Moreover, it has been proposed that the interaction of iridium with reducible supports, like ceria, improves metal dispersion and prevents Ir from sintering [41,61,66]. This is in excellent agreement with TEM measurements (Sect.…”

Section: Catalyst Characterization Studiessupporting

confidence: 87%

Dry Reforming of Methane: Catalytic Performance and Stability of Ir Catalysts Supported on γ-Al2O3, Zr0.92Y0.08O2−δ (YSZ) or Ce0.9Gd0.1O2−δ (GDC) Supports

et al. 2015

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The impact of the support on the Ir-catalyzed dry (CO 2 ) reforming of methane (DRM) reaction is explored in the present study. With this aim, supported iridium catalysts Ir/c-Al 2 O 3 , Ir/YSZ and Ir/GDC with 1 wt% iridium loading, using c-Al 2 O 3 , 8 mol% Y 2 O 3 stabilized ZrO 2 (YSZ: Zr 0.92 Y 0.08 O 2-d ) and 10 mol% Gd 2 O 3 doped CeO 2 (GDC: Ce 0.9 Gd 0.1 O 2-d ) as supports were comparatively studied in the temperature range of 400-850°C. The feasibility of tuning the catalytic performance and/or stability of the Ir active phase during DRM reaction, via support-induced interactions, was investigated. All catalysts were found to be extremely active and stable over time on stream. No significant effects induced by the support were observed at the high operating temperature of DRM. However, opposite to Ir/cAl 2 O 3 and Ir/YSZ samples, Ir/GDC provides the benefit to be stable in oxidation steps and/or oxidation-reduction cycles. This is of significant practical importance since such treatment procedures are often used in practice for catalysts regeneration. Besides catalytic performance measurements, extended hydrogen temperature-programmed reduction experiments, supported further by transmission electron microscopy characterization studies were carried out in order to reveal the impact of the support on the aforementioned stability and its origin.

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Section: Catalyst Characterization Studiessupporting

confidence: 87%

Dry Reforming of Methane: Catalytic Performance and Stability of Ir Catalysts Supported on γ-Al2O3, Zr0.92Y0.08O2−δ (YSZ) or Ce0.9Gd0.1O2−δ (GDC) Supports

et al. 2015

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“…Not only was a high dispersion of both catalysts present but also no impurities (e.g., boron) interfered with the catalytic activities. The hydrogen yield (H 2 mole/EtOH mole) exceeds 5.0 with less content of CO and CH 4 (<2%) (Siang et al, 2010).…”

Section: Iridiummentioning

confidence: 98%

Sustainable Hydrogen Production by Catalytic Bio-Ethanol Steam Reforming

Palma¹,

Castaldo²,

Ciambelli³

et al. 2012

Greenhouse Gases - Capturing, Utilization and Reduction

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“…CH 3 -*  CH 2 -*  CH-*  C (9) C + OH-*  CO (10) Carbon deposition is considered to be the main cause for the deactivation of Co-based catalyst in the steam reforming of ethanol [34]. The effect of support can be tuned with alkaline earth to obtain sufficient acid-base sites [35,36] for water splitting into OH group and limited acidic sites to avoid the formation of coke, which results from the polymerization of olefin.…”

Section: Catalytic Performancementioning

confidence: 99%

“…From the environmental point of view the use of ethanol is preferred because renewable ethanol obtained from biomass offers high hydrogen content, non-toxicity, safe storage and easy handling [2][3][4]. Ethanol can be catalytically converted with active metals or metal oxides through steam reforming into a H 2 -rich gas at a moderate temperature (range 300 °C to 600 °C) [5][6][7][8][9][10]. Among these, Co-based catalysts exhibit appreciable activities for the CC bond broken and water-gas shift (WGS) reaction.…”

Section: Introductionmentioning

confidence: 99%

Ca-Modiﬁed Co/SBA-15 Catalysts for Hydrogen Production through Ethanol Steam Reforming

Chiou¹,

Liu²,

Ho³

et al. 2013

ILCPA

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Hydrogen production through steam reforming of ethanol (SRE) over the Ca-modified Co/SBA-15 catalysts was studied herein to evaluate the catalytic activity, stability and the behavior of coke deposition. The Ca-modified SBA-15 supports were prepared from the Ca(NO 3 ) 2 ·4H 2 O (10 wt %) which was incorporated to SBA-15 by incipient wetness impregnation (assigned as Ca/SBA-15) and direct hydrothermal (assigned as Ca-SBA-15) method. The active cobalt species from the Co(NO 3 ) 2 ·6H 2 O (10 wt %) was loaded to SiO 2 , SBA-15 and modified-SBA-15 supports with incipient wetness impregnation method to obtain the cobalt catalysts (named as Co/SiO 2 , Co/SBA-15, CoCa/SBA-15 and Co/Ca-SBA-15, respectively). The prepared catalysts were characterized by using Xray diffraction (XRD), temperature programmed reduction (TPR), transmission electron microscopy (TEM) and BET. The catalytic performance of the SRE reaction was evaluated in a fixed-bed reactor. The results indicated that the Co/Ca-SBA-15 catalyst was preferential among these catalysts and the ethanol can be converted completely at 375 °C. The hydrogen yield (Y H2 ) approached 4.76 at 500 °C and less coke deposited. Further, the long-term stability test of this catalyst approached 100 h at 500 °C and did not deactivate.

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Hydrogen production from steam reforming of ethanol using a ceria-supported iridium catalyst: Effect of different ceria supports

Cited by 55 publications

References 31 publications

Dry Reforming of Methane: Catalytic Performance and Stability of Ir Catalysts Supported on γ-Al2O3, Zr0.92Y0.08O2−δ (YSZ) or Ce0.9Gd0.1O2−δ (GDC) Supports

Dry Reforming of Methane: Catalytic Performance and Stability of Ir Catalysts Supported on γ-Al2O3, Zr0.92Y0.08O2−δ (YSZ) or Ce0.9Gd0.1O2−δ (GDC) Supports

Sustainable Hydrogen Production by Catalytic Bio-Ethanol Steam Reforming

Ca-Modiﬁed Co/SBA-15 Catalysts for Hydrogen Production through Ethanol Steam Reforming

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