Catalytic ceramic paper for the combustion of diesel soot

Banús, Ezequiel David; Ulla, Maria Alicia del H.; Galván, María Verónica; Zanuttini, Miguel Angel Mario; Milt, Viviana Guadalupe; Miró, Eduardo Ernesto

doi:10.1016/j.catcom.2010.08.004

Cited by 17 publications

(15 citation statements)

References 22 publications

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“…Several of our studies suggest that the paper-specific microstructure effectively improves the efficiency of catalytic reactions [28]. Therefore, paper is expected to be a promising structured catalyst support, and this concept has recently gained worldwide interest [29]. Our established papermaking technique allows for the versatile combination of various fibers and catalyst powders.…”

Section: Paper-like Fiber/catalyst Compositesmentioning

confidence: 99%

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%

On-paper Synthesis of Metal Nanoparticles for Catalytic Applications

Koga

Kitaoka²

2011

Sen-i Gakkaishi

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“…The synthesis of this material was easy and fast, and provided a high-temperature resistant paper. The presence of potassium and cerium as active ingredients conferred high catalytic activity for the reaction studied under loose contact, showing a maximum combustion rate at 395°C [20].…”

Section: Ceramic Papersmentioning

confidence: 99%

“…Other factors of interest are the soot to catalyst ratio and the concentration of NOx and O2, because the concentration of these gases can change during the diesel engine operation [20].…”

Section: Structured Catalystsmentioning

confidence: 99%

“…For the former, the catalytic components can be either coated onto the ceramic fiber or held as particles between the ceramic fibers [20] and for the latter, similar to foams, the filaments of the wire mesh can be coated with the catalyst and act as a catalytic filter [41]. Meille [39] described different coating methods: washcoating using a suspension (La2O3-Al2O3, Pd/ZnO, CuO/ZnO-Al2O3), sol-gel deposition (Pt/Al2O3, Rh/Al2O3, Pd/Al2O3, Pd/La2O3, Pd/SiO2), hybrid method between suspension and sol-gel (CeO2-ZrO2-La2O3-Al2O3, CuO/ZnO-Al2O3), electrophoretic deposition (Al2O3), electrochemical deposition (CuZn), electroless plating (Cu-Zn) and impregnation (Rh, Ni/La2O3, Fe2O3).…”

Section: Structured Catalystsmentioning

confidence: 99%

“…The catalysts were evaluated with real soot obtained by diesel combustion in a glass vessel [20] or different materials substitutive of the soot, as carbon black [98] or commercial soot (i.e. : 390127-25G of Aldrich) [99].…”

Section: Catalytic Tests Of Powder and Structured Catalystsmentioning

confidence: 99%

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