Review of methanol reforming-Cu-based catalysts, surface reaction mechanisms, and reaction schemes

Yong, Siek Ting; Ooi, Chien Wei; Chai, Siang‐Piao; Wu, Xiao

doi:10.1016/j.ijhydene.2013.03.023

Cited by 252 publications

(125 citation statements)

References 128 publications

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“…Regarding the reaction mechanism of methanol steam reforming over copper-based catalysts, four schemes have been proposed [7] including a methanol decomposition-water gas shift reaction scheme [71], a 1-step methanol steam reforming scheme [72,73], a methanol steam reforming-methanol decomposition-reverse water gas shift reaction scheme [74,75] and a methyl formate scheme [76][77][78]. The methanol steam reforming-methanol decomposition-reverse water gas shift reaction scheme is also adopted for methanol steam reforming over palladium catalysts [79,80].…”

Section: Reaction Mechanism Of Methanol Steam Reformingmentioning

confidence: 99%

“…Onboard hydrogen production by a processing system which converts liquid hydrocarbon fuels into hydrogen is a practical solution [4,5]. Among various fuels, methanol receives attention for onboard processing applications because: (a) It is easy to handle and store; (b) It can be extracted from renewable sources and it is biodegradable; (c) Its reforming temperature is relatively low compared to the other fuels; and (d) Its tendency to form coke during reforming is low due to the high H/C ratio [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Review on Copper and Palladium Based Catalysts for Methanol Steam Reforming to Produce Hydrogen

Shuai

2017

Catalysts

109

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Abstract:Methanol steam reforming is a promising technology for producing hydrogen for onboard fuel cell applications. The methanol conversion rate and the contents of hydrogen, carbon monoxide and carbon dioxide in the reformate, significantly depend on the reforming catalyst. Copper-based catalysts and palladium-based catalysts can effectively convert methanol into hydrogen and carbon dioxide. Copper and palladium-based catalysts with different formulations and compositions have been thoroughly investigated in the literature. This work summarized the development of the two groups of catalysts for methanol steam reforming. Interactions between the activity components and the supports as well as the effects of different promoters were discussed. Compositional and morphological characteristics, along with the methanol steam reforming performances of different Cu/ZnO and Pd/ZnO catalysts promoted by Al 2 O 3 , CeO 2 , ZrO 2 or other metal oxides, were reviewed and compared. Moreover, the reaction mechanism of methanol steam reforming over the copper based and palladium based catalysts were discussed.

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Section: Reaction Mechanism Of Methanol Steam Reformingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Review on Copper and Palladium Based Catalysts for Methanol Steam Reforming to Produce Hydrogen

Shuai

2017

Catalysts

109

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“…Presently, four different reaction processes are considered in methanol reforming, such as: methanol decomposition, partial oxidation of methanol, steam reforming of methanol and oxidative steam reforming of methanol [24]. The sequence of the reaction is one that brings to H 2 formation is subject of different pathway proposals and discussion.…”

Section: Kinetic Modelsmentioning

confidence: 99%

Low-temperature methanol steam reforming kinetics over a novel CuZrDyAl catalyst

Silva

Mateos-Pedrero

Ribeirinha

et al. 2015

Reac Kinet Mech Cat

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A kinetic study within the low-temperature methanol steam reforming (MSR) reaction range (170 ºC -200 ºC) was performed over a novel CuZrDyAl catalyst. The physicochemical and catalytic properties of the CuZrDyAl catalyst were compared with those of a conventional CuO/ZnO/Al 2 O 3 (G66 MR, Süd-Chemie) sample, taken as reference. The in-house catalyst displays better performances, in terms of methanol conversion and H 2 production, than the reference G66 MR sample.Interestingly, the in-house catalyst is significantly more selective (namely, yielding lower CO concentration) than the commercial one, which gives extra interest for producing fuel cell grade hydrogen. Physicochemical characterization evidences that the in-house catalyst have improved reducibility of copper species compared with the G66-MR, which might account for its better performances.The parameters of a simple power-law equation and two mechanistic kinetic models were determined by non-linear regression, minimizing the sum of the residual squares; the best fitting with the experimental data was obtained when using Model 3, based on the reported work from Peppley et al. [10] for the commercial CuO/ZnO/Al 2 O 3 .This article was published in Reaction Kinetics, Mechanisms and Catalysis, 115(1), 321-339, 2015 http://dx.doi.org/10.1007/s11144-015-0846-z 03-11-2017 2 Noteworthy, is the scarce number of MSR kinetic studies at such lower temperature range.

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“…Regardless, the catalyst type ZnO support has a ubiquitous presence. Although CuO/Zn-based catalysts are used in industry since the 1960s, the role of ZnO in these catalysts systems remains unclear despite the efforts made to elucidate its role [2][3][4][5][6]. For instance, Karim et al investigated the effect of ZnO morphology on the reactivity of PdZnO catalysts for MSR [7], and concluded that the activity was higher for faceted ZnO materials [7].…”

Section: Introductionmentioning

confidence: 99%

CuO/ZnO catalysts for methanol steam reforming: The role of the support polarity ratio and surface area

Mateos-Pedrero

Silva

Tanaka

et al. 2015

Applied Catalysis B: Environmental

119

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The effect of surface area and polarity ratio of ZnO support on the catalytic properties of CuO/ZnO catalyst for methanol steam reforming (MSR) are studied. The surface area of ZnO was varied changing the calcination temperature, and its polarity ratio was modified using different Zn precursors, zinc acetate and zinc nitrate. It was found that the copper dispersion and copper surface area increase with the surface area of the ZnO support, and the polarity ratio of ZnO strongly influences the reducibility of copper species. A higher polarity ratio promotes the reducibility, which is attributed to a strong interaction between copper and the more polar ZnO support. Interestingly, it was observed that the selectivity of CuO/ZnO catalysts (lower CO yield) increases with the polarity ratio of ZnO carriers. As another key result, CuO/ZnOAc375 catalyst has proven to be more selective (up to 90%) than a reference CuO/ZnO/Al2O3 sample (G66-MR, Süd Chemie).The activity of the best performing catalyst, CuO/ZnOAc-375, was assessed in a Pd-composite membrane reactor and in a conventional packed-bed reactor. A hydrogen recovery of ca. 75% and a hydrogen permeate purity of more than 90% was obtained. The Pd-based membrane reactor allowed to improve the methanol conversion, by partially suppressing the methanol steam reforming backward reaction, besides upgrading the reformate hydrogen purity for use in HT-PEMFC.2

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Review of methanol reforming-Cu-based catalysts, surface reaction mechanisms, and reaction schemes

Cited by 252 publications

References 128 publications

Review on Copper and Palladium Based Catalysts for Methanol Steam Reforming to Produce Hydrogen

Review on Copper and Palladium Based Catalysts for Methanol Steam Reforming to Produce Hydrogen

Low-temperature methanol steam reforming kinetics over a novel CuZrDyAl catalyst

CuO/ZnO catalysts for methanol steam reforming: The role of the support polarity ratio and surface area

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