Methanol steam reforming over paper-like composites of Cu/ZnO catalyst and ceramic fiber

Fukahori, Shuji; Kitaoka, Takuya; Tomoda, Akihiko; Suzuki, Ryō; Wariishi, Hiroyuki

doi:10.1016/j.apcata.2005.11.008

Cited by 63 publications

(42 citation statements)

References 27 publications

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“…1). In addition, the paper-structured catalysts were highly effective in various catalytic processes, such as the photodecomposition of bisphenol A in water [21], methanol reforming for hydrogen production [22][23][24] and NOX removal for exhaust gas purification [25][26][27]. Several of our studies suggest that the paper-specific microstructure effectively improves the efficiency of catalytic reactions [28].…”

Section: Paper-like Fiber/catalyst Compositesmentioning

confidence: 99%

“…zeolite [20], titanium dioxide [21], Cu/ZnO [22][23][24] and platinum/aluminum oxide (Pt/Al2O3) [25,26], were successfully supported on a microstructured paper matrix composed of ceramic fibers, using a papermaking technique combined with a dual polymer retention (DPR) system. We found that the as-prepared composites, which we referred to as paper-structured catalysts, had paperlike practical utility and a highly porous microstructure that was derived from their ceramic fiber networks (Fig.…”

Section: Paper-like Fiber/catalyst Compositesmentioning

confidence: 99%

“…The AuNPs@ZnO paper was subjected to CO oxidation [32]. These gas-phase catalytic processes were carried out using a fixed-bed flow-type reactor with on-line gas chromatography (GC) [22,24] and a NOX analyzer system [25]. For AuNPs@ZnO paper, a liquid-phase 4-NP reduction process to produce 4-aminophenol (4-AP) was also conducted in batch mode, and the reaction progress was monitored by UV-vis spectrometry [33].…”

Section: Catalytic Performance Testmentioning

confidence: 99%

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On-paper Synthesis of Metal Nanoparticles for Catalytic Applications

Koga

Kitaoka²

2011

Sen-i Gakkaishi

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Metal catalysts have played essential roles in a wide range of chemical industrial processes [1][2][3]. For example, the copper/zinc oxide (Cu/ZnO) catalyst has been especially important for methanol synthesis [4] and alcohol reforming to produce hydrogen for fuel cell applications [5]. Energy, environmental and resource problems have escalated in recent times. Therefore, the development of high-performance catalytic materials that can effectively and selectively promote desired reactions is required for sustainability. Metal nanocatalystsNanosized metal particles have received an increasing amount of attention in various fields, such as in electronic [6], optical [7] and biomedical [8] applications, because of their unique and specific properties. In particular, the extremely large specific surface areas of metal nanoparticles (NPs) are very advantageous for effective catalytic reactions [9]. This has led to the active use of metal NPs as heterogeneous catalysts for a variety of industrial processes [9] including energy conversion, fine chemical synthesis and environmental cleanup. For example, gold (Au) nanocatalysts have received considerable interest for use in various reactions, including the reduction of 4-nitrophenol (4-NP) in the liquid phase [10] and low-temperature carbon monoxide (CO) oxidation [11] in the gas phase, even though bulk Au is typically regarded as an ineffective catalyst. However, the practical implementation of metal NPs is difficult, because they are difficult to handle and they aggregate easily, which minimizes their surface area. The aggregation of metal NPs results in the formation of ordinary bulk metals, and this consequently deteriorates their excellent functionalities. Therefore, catalytic metal NPs are generally attached to various support materials, such as polymers [9,12] and metal oxide powders [9,13]. Since these supported catalysts are fine and are handled with difficulty in practice, they are generally fashioned as beads or pellets. This eventually decreases their catalytic reactivity, because of the poor contact efficiency between the reactants and the catalytically active sites [14]. In addition, filling a reactor with solid catalysts can cause a high pressure drop, local reactant flow and an uneven thermal environment inside the catalyst layer, leading to an inefficient overall process, particularly for flow-type reactions. Therefore, establishing an efficient and practical immobilization technique that enables highly active metal NPs to be attached to and exposed on easyto-handle porous matrices is a challenge. On-paper Synthesis of Metal Nanoparticles for Catalytic ApplicationsDepartment of Agro-environmental Sciences, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan ( † Present address : Department of Biomaterials Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan)Abstract: We discuss the successful in ...

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Section: Paper-like Fiber/catalyst Compositesmentioning

confidence: 99%

Section: Paper-like Fiber/catalyst Compositesmentioning

confidence: 99%

Section: Catalytic Performance Testmentioning

confidence: 99%

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On-paper Synthesis of Metal Nanoparticles for Catalytic Applications

Koga

Kitaoka²

2011

Sen-i Gakkaishi

Self Cite

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“…3, the retention of catalyst powders can be more than 95% with the dual polymer retention system (Fukahori et al, 2006a), and such polymer systems are applicable to large-scale production. In addition, catalyst papers are highly effective for a wide range of catalytic processes such as the photodecomposition of bisphenol A in water (Fukahori et al, 2003), methanol reforming for hydrogen production (Fukahori et al, 2006a(Fukahori et al, , 2008Koga et al, 2006Koga et al, , 2008a and removal of nitrogen oxides for exhaust gas purification (Ishihara et al, 2010). Moreover, our established papermaking technique allows the compounding of various functional fibers such as silicon carbide fibers (Fukahori et al, 2006b) and carbon fibers (Koga et al, 2009b) with high thermal conductivity, leading to further improvement of the catalytic performance.…”

Section: Catalytic Applicationsmentioning

confidence: 99%

“…We have reported that various catalyst powders, e.g. zeolite , TiO 2 (Fukahori et al, 2003(Fukahori et al, , 2007Iguchi et al, 2003), Cu/ZnO (Fukahori et al, 2006a(Fukahori et al, , 2006bKoga et al, 2006) and platinum/aluminum oxide (Pt/Al 2 O 3 ) (Ishihara et al, 2010), can be incorporated into an inorganic paper matrix by a papermaking technique. The papermaking procedure is summarized as follows.…”

Section: Catalytic Applicationsmentioning

confidence: 99%