Steam reforming of dimethyl ether over H-mordenite-Cu/CeO2 catalysts

Matsumoto, Toshiro; Nishiguchi, Toshiya; Kanai, Hiroyoshi; Utani, Kazunori; Matsumura, Yukihiko; Imamura, Seiichiro

doi:10.1016/j.apcata.2004.08.013

Cited by 70 publications

(41 citation statements)

References 23 publications

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“…Evidence for carbon deposition was observed by TPO analysis over spent zeolite-based composites [30]. The fast degradation in DME SR was generally ascribable to carbon formation over various catalyst systems, such as, Cu catalysts mixed with ZSM-5 [26,30] and H-mordenite [18,30]. Coking selectivity over acid catalysts is dependent on their acid strength, and was in line with their deactivation behavior.…”

Section: Hydrolysis and Steam Reforming Activity And Stability Of Thementioning

confidence: 62%

Dimethyl Ether—Reforming Catalysts for Hydrogen Production

Faungnawakij

Eguchi

2010

Catal Surv Asia

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This article reviews our recent works on dimethyl ether steam reforming (DME SR) over nanocomposite catalysts of copper-based spinel oxide and solidacid catalyst. A series of Cu-based spinels was prepared by citric acid complexation method and their catalytic performance was studied in terms of activity, selectivity, and stability. The influence of preparation conditions, such as calcination temperature, reduction temperature, and chemical composition, and reforming conditions, such as steam-to-carbon ratio and reaction temperature, was systematically studied. Effect of type of solid-acid catalyst was also reported. Zeolite-based composites and aluminabased ones are highly active in temperature ranges of \300°C and [300°C, respectively. The composite of CuFe 2 O 4 and alumina treated thermally in air at 700-800°C exhibited excellent activity and stability in DME SR. Upon H 2 reduction, phase separation of copper spinel to metallic copper nanoparticles and host oxides proceeds. The high dispersion of the Cu particles (Cu 1? -rich surface of ca. 70%) on the hosts, and the strong chemical interaction between them could be observed. The H 2 -rich reformate ([70% H 2 ) could be attained for longer than 800 h at 375°C, showing the good potential for practical use in H 2 and fuel cell applications. Doping Ni to CuFe 2 O 4 significantly enhanced the stability of the catalyst, in accordance with the alloying effect. Regeneration of the degraded catalysts could be obtained by simple heattreatment since carbon deposits were removed, and spinel structures were reconstructed.

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Section: Hydrolysis and Steam Reforming Activity And Stability Of Thementioning

confidence: 62%

Dimethyl Ether—Reforming Catalysts for Hydrogen Production

Faungnawakij

Eguchi

2010

Catal Surv Asia

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“…E-mail: sobyanin@catalysis.nsk.su the energy transportation. Therefore, the hydrogen-rich gas, or the synthesis gas produced by DME SR [7][8][9][10][11][12][13][14][15][16], seems to be an attractive reactant for fuel cells and other applications.…”

Section: Introductionmentioning

confidence: 99%

Steam reforming of dimethyl ether to hydrogen-rich gas

Бадмаев

Volkova

Belyaev

et al. 2007

React Kinet Catal Lett

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The steam reforming of dimethyl ether (DME) (SR) to a hydrogen-rich gas over a mechanical mixture of WO x /ZrO 2 (the DME hydration catalyst) and CuZnAlO x (the methanol SR catalyst) was studied. The mechanically mixed catalyst was shown to provide almost complete conversion of DME to the hydrogen-rich gas containing <0.5 vol.% of CO at 300°C, atmospheric pressure, gas hourly space velocity (GHSV) of 10000 h -1 and molar ratio H 2 O/DME = 3. The hydrogen production rate in DME SR was found to reach 180-250 mmol H 2 /(g cat ⋅h) at 250-300°C.

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“…In recent years, special attention is being concentrated on the development of catalytic steam reforming of dimethyl ether (DME SR) to hydrogen-rich gas for fuel cell applications [1][2][3][4][5][6][7][8]. It has been found that the DME SR proceeds via a two-step mechanism.…”

Section: Introductionmentioning

confidence: 99%

“…E-mail: sobyanin@catalysis.nsk.su second one is methanol steam reforming. According to [1][2][3][4], DME SR can be catalyzed by mechanical mixtures of two catalysts, namely, a solid acid for the DME hydration to methanol and a copper-containing catalyst for the methanol steam reforming. A design of active and selective mechanically-mixed catalysts for the DME SR requires knowledge on the properties of both Cu-containing catalysts for methanol SR and solid acids for the DME hydration to methanol.…”

Section: Introductionmentioning

confidence: 99%