Hydrogen production from ethanol over Co/ZnO catalyst in a multi-layered reformer

Lee, Yong‐Kul; Kim, Kyoung-Suk; Ahn, Jin-Goo; Son, In-Hyuk; Shin, Woo Cheol

doi:10.1016/j.ijhydene.2009.11.035

Cited by 18 publications

(3 citation statements)

References 13 publications

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“…Moreover, positive feedback can be observed in the use of LDHs in SRE [38][39][40][41]. In this work, we have studied the catalytic activity of hydrotalcite-like materials containing Co in which the Mg has been substituted by Zn (Zn-Al hydrotalcite-like materials), since ZnO has been used with good results as support in the SRE [42][43][44][45][46][47]. One of the advantages is related to the ability of Zn to decrease the formation of CO, because ZnO favors water gas shift reaction (WGS) [48].…”

Section: Introductionmentioning

confidence: 99%

Co and La supported on Zn-Hydrotalcite-derived material as efficient catalyst for ethanol steam reforming

Cerdá-Moreno

Costa-Serra

Chica

2019

International Journal of Hydrogen Energy

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Four samples of Zn-hydrotalcite containing different amounts of Co (5, 10, 20, and 30 wt.%) have been synthesized and tested in the steam reforming of ethanol. The best results were obtained with the sample containing 20 wt.% of Co (20CoHT), with a complete conversion of ethanol and yields to hydrogen close to the equilibrium (73 mol.%). The physicochemical characterization of the samples by DRX, BET area and TPR indicates that the excellent performance exhibited by the sample containing 20 wt.% of Co is due to the higher percentage of reduced cobalt and lower crystallite size of metallic cobalt present in this sample (11 nm). Additional studies have been carried out to improve the stability of this catalytic material against deactivation by the incorporation of 1 wt.% of La. Stability studies were carried out using an industrial alcoholic waste as feed. Deactivation after 24 hours of reaction time was found lower for the catalyst containing La (20CoLaHT), confirming the positive effect of lanthanum on the catalytic stability. The results presented here show that it is possible to prepare a catalyst based on Co supported on Zn-hydrotalcite and promoted with La with improved ethanol conversion, high hydrogen selectivity, and high stability to produce hydrogen by the steam reforming of an industrial alcoholic waste without commercial value.

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Section: Introductionmentioning

confidence: 99%

Co and La supported on Zn-Hydrotalcite-derived material as efficient catalyst for ethanol steam reforming

Cerdá-Moreno

Costa-Serra

Chica

2019

International Journal of Hydrogen Energy

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“…Previously, the reaction mechanisms of CH 3 OH dissociation with the C-H, O-H, or C-O bond on the surfaces have been investigated theoretically and experimentally [6,[9][10][11][12][13]. In the present work, we perform only the configuration of site A as initial state (IS A ) to calculate mechanism for CH 3 OH dissociation on 2Cu/ZnO (1010) [25], CuCl(111) [1], and Au(111) [4] surfaces.…”

Section: Methanol Dissociationmentioning

confidence: 99%

DENSITY FUNCTIONAL THEORY STUDY OF METHANOL ADSORPTION AND DISSOCIATION ON 2Cu/ZnO CATALYST SURFACE

Cong¹

2018

JST

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The adsorption and dissociation of methanol (CH3OH) on the cluster with two copper atoms (2Cu) supported over ZnO catalyst surface were investigated using the density functional theory (DFT). The performance of 2Cu adsorbed on ZnOsurface to obtain model of the 2Cu/ZnO catalyst surface. The most stable site of CH3OH with configuration and energy of adsorption was investigated. The reaction pathway of CH3OH dissociation via bond scission of the O–H, C–H and C–O to form methoxide, hydroxymethyl and methyl was examined, respectively. The obtained calculations pointed out that O–H bond scission is found to be the most favorable pathway on 2Cu/ZnO catalyst surface.

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“…Moreover, the morphology effect of ZnO-supported catalysts [14], doping extra metal in the catalytic system [15,16] and using a new type of multi-layered reformer [17] to modify the Co/ZnO catalytic system and promote the catalytic performance were reported on recently. In the literature there have been some reports that Pt-based catalysts on different supports, including CeO 2 , ZrO 2 , CeZrO 2 and Al 2 O 3 [18][19][20][21][22][23], exhibited good activity for hydrogen production.…”

Section: Introductionmentioning

confidence: 99%

Surface Area Effect of Zinc Oxide for Steam Reforming of Ethanol over Supported-Platinum Catalysts

Chiou

Wang

et al. 2012

e-J. Surf. Sci. Nanotechnol.

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The effect of surface area over the ZnO-supported platinum catalysts on the catalytic performance of steam reforming of ethanol (SRE) has been studied. Various surface area of ZnO is prepared through two routes: reflux (assigned as ZnO-R), thermal decomposition under air (assigned as ZnO-A) and under N2 (assigned as ZnO-N). Also, the commercial ZnO (assigned as ZnO-C) is chosen as reference. Four Pt/ZnO catalysts (3 wt% loading of Pt) are prepared by incipient wetness impregnation (assigned as Pt-R, Pt-A, Pt-N and Pt-C, respectively). The BET measurement shows that the ZnO-A (89 m 2 ·g −1 ) support possesses a higher surface area than the ZnO-R (1.3 m 2 ·g −1 ). The catalytic activity on the SRE reaction is evaluated in a fixed-bed reactor under 22,000 h −1 GHSV and H2O/EtOH molar ratio of 13. The results show that total ethanol conversion is observed at 225• C and 400• C over the Pt-A and Pt-R catalysts, respectively. When the temperature exceeds 350• C, acetaldehyde decomposition and acetaldehyde steam reforming are competitive on the platinum catalysts to promote H2 production. The small particle size catalyst of Pt-A favors the decomposition of acetaldehyde to produce CH4 and CO, and the large particle size catalyst of Pt-R favors the steam reforming of acetaldehyde to produce CH4 and CO2.

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Hydrogen production from ethanol over Co/ZnO catalyst in a multi-layered reformer

Cited by 18 publications

References 13 publications

Co and La supported on Zn-Hydrotalcite-derived material as efficient catalyst for ethanol steam reforming

Co and La supported on Zn-Hydrotalcite-derived material as efficient catalyst for ethanol steam reforming

DENSITY FUNCTIONAL THEORY STUDY OF METHANOL ADSORPTION AND DISSOCIATION ON 2Cu/ZnO CATALYST SURFACE

Surface Area Effect of Zinc Oxide for Steam Reforming of Ethanol over Supported-Platinum Catalysts

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