Water gas shift reaction of reformed fuel over supported Ru catalysts

Utaka, Toshimasa; Okanishi, Takeou; Takeguchi, Tatsuya; Kikuchi, Ryuji; Eguchi, Koichi

doi:10.1016/s0926-860x(02)00657-9

Cited by 87 publications

(43 citation statements)

References 12 publications

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“…CO produced by steam reformation must be reduced to ppm levels before introducing the reformate to the PEM fuel cell. CH 3 OHðgÞ þ H 2 OðgÞ ¼ 3H 2 ðgÞ þ CO 2 ðgÞ;…”

Section: Introductionmentioning

confidence: 99%

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The Effects of PdZn Crystallite Size on Methanol Steam Reforming

2007

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Exceptional activity and selectivity of Pd/ZnO catalysts for methanol steam reforming have been attributed to the formation of PdZn alloy. In this paper, we evaluated the crystallite size effects of PdZn alloy on methanol steam reforming. An organic preparation method was used to avoid the complexity from the alteration of ZnO morphology typically associated with the conventional aqueous preparation method. Both Pd loading and reduction temperature ([350°C) were used to vary the crystallite size of PdZn alloy. Experimental activity studies and transmission electron microscope (TEM) characterizations indicated that formation of large sized PdZn crystallites exhibit high reactivity and low CO selectivity during methanol steam reforming.

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“…CO produced by steam reformation must be reduced to ppm levels before introducing the reformate to the PEM fuel cell. CH 3 OHðgÞ þ H 2 OðgÞ ¼ 3H 2 ðgÞ þ CO 2 ðgÞ;…”

Section: Introductionmentioning

confidence: 99%

“…However, the Cu-based catalysts have significant disadvantages, including their pyrophoric nature and the tendency to deactivate at high temperature ([*280°C) [1,2]. In addition, stability under certain oxidizing environments is a concern [3]. On the other hand, group VIII metals exhibit different performance than copper based catalysts.…”

Section: Introductionmentioning

confidence: 99%

The Effects of PdZn Crystallite Size on Methanol Steam Reforming

2007

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“…In the fuel cell technology, highly active catalysts are also required for reforming, shift reaction, preferential oxidation, electrode reaction, etc. [4][5][6][7][8][9][10][11][12]. Precious metals are generally deposited on oxide or carbon supports which possess high surface area to maintain highly dispersed active reaction sites.…”

Section: Introductionmentioning

confidence: 99%

Effect of reduction–oxidation treatment on the catalytic activity over tin oxide supported platinum catalysts

Matsui

Okanishi

Fujiwara

et al. 2006

Science and Technology of Advanced Materials

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In precious metal-oxide catalyst system, the support materials strongly affect the catalytic activity. Especially the term of strong metal-support interaction is well known: Tauster . It was also demonstrated that this interaction could modify the catalytic activity of precious metals in different reactions. Accordingly, elucidating these phenomena will be the useful guide for the development of new class of active catalysts. Thus, we had focused on the chemical interaction between platinum and oxide and reported several results. Tin oxide supported platinum catalysts were heat-treated under oxidizing or reducing atmospheres at various temperatures, and their catalytic activity for methane combustion and electrochemical oxidation of CO was investigated. The resulting catalysts exhibited the peculiar microstructure and catalytic activity because of the metal-support interaction. r

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“…ZnO is also used to improve the catalyst dispersion. 38 The most commonly used catalysts reported in the literature for the WGS reaction are Cu-based catalysts and precious metal catalysts such as Au, 39,40 Pt, 41 Ru, 42 and Pd. 43 Recently, demand for small-scale H 2 production units for fuel cell applications has increased.…”

Section: Water Gas Shiftmentioning

confidence: 99%

Properties of Nanocatalytic Materials for Hydrogen Production from Renewable Resources

Xianqin

2013

Nanocatalysis Synthesis and Applications

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INTRODUCTIONHeterogeneous catalysis is an integral part of more than 90% of chemical manufacturing processes worldwide. 1 It has been improving in both energy production and environment on the Earth (i.e., reduced crude cracking). Currently, almost 85% of the world energy demand is fulfilled by oil, natural gas, and coal. 2 These finite resources will deplete within less than 120 years. 3 Moreover, the alternative nonconventional energy sources, such as solar energy, geothermal energy, and nuclear energy, are difficult to grow rapidly to fill the gap. Additionally, CO 2 emissions, mainly from fossil energy combustion, 4 have increased tremendously in the past 150 years (from 280 to 370 ppm). The standard of living conditions is improving constantly at the expense of higher energy consumption. However, we cannot afford to meet our energy needs at the cost of environmental and climate deterioration in the twenty-first century. The aforementioned challenges urge us to develop alternative and clean energy resources to secure the sustainability of human society and the environment.Combustion of H 2 is an attractive alternative; unlike fossil fuels, its only combustion by-product is water. In addition, H 2 possesses the highest energy content per unit weight than any other fuels, almost three times that of gasoline. Furthermore, H 2 is available from a variety of sources in the universe. Thus, H 2 has been considered to be the best solutions to the potential energy crisis. 5 It has also been globally used in ammonia Nanocatalysis: Synthesis and Applications, First Edition. Edited by Vivek Polshettiwar and Tewodros Asefa.

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Water gas shift reaction of reformed fuel over supported Ru catalysts

Cited by 87 publications

References 12 publications

The Effects of PdZn Crystallite Size on Methanol Steam Reforming

The Effects of PdZn Crystallite Size on Methanol Steam Reforming

Effect of reduction–oxidation treatment on the catalytic activity over tin oxide supported platinum catalysts

Properties of Nanocatalytic Materials for Hydrogen Production from Renewable Resources

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