Bibliografías temáticas / Carbon monoxide Catalysts

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Literatura académica sobre el tema "Carbon monoxide Catalysts"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 1 de febrero de 2022

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Artículos de revistas sobre el tema "Carbon monoxide Catalysts"

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Wang, Lin Tong. "Oxidation of Copper Zinc Oxide Catalysts by Carbon Monoxide". Advanced Materials Research 332-334 (septiembre de 2011): 564–67. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.564.

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Copper zinc oxide catalysts are effective for the ambient temperature carbon monoxide oxidation and display higher specific activity than the current commercial hopcalite catalyst. We investigate the copper zinc oxide catalyst prepared by co-precipitation under different atmospheres for the oxidation of carbon monoxide at low temperatures and these systems are now worthy of further investigation.
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Edwards, Jennifer, Philip Landon, Albert F. Carley, Andrew A. Herzing, Masashi Watanabe, Christopher J. Kiely y Graham J. Hutchings. "Nanocrystalline gold and gold–palladium as effective catalysts for selective oxidation". Journal of Materials Research 22, n.º 4 (abril de 2007): 831–37. http://dx.doi.org/10.1557/jmr.2007.0117.

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The recent interest in oxidation catalysis provides the focus for this article. Until recently, gold has been overlooked as a key component of both homogeneous and heterogeneous catalysts. However, the observation in the 1980s that nanocrystalline gold supported on oxides was an effective catalyst for low-temperature carbon monoxide oxidation has now captured the imagination of many researchers. At present, low-temperature carbon monoxide oxidation remains an intensely studied field, but in recent years increased emphasis has been placed on using gold catalysts for selective oxidation. For example, the oxidation of alkanes, alkenes, and alcohols have all been shown to be effective with gold-based catalysts. In addition gold–palladium bimetallic catalysts have been shown to be very effective for the direct formation of hydrogen peroxide, and this will be described in this article.
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Al Soubaihi, Rola Mohammad, Khaled Mohammad Saoud, Myo Tay Zar Myint, Mats A. Göthelid y Joydeep Dutta. "CO Oxidation Efficiency and Hysteresis Behavior over Mesoporous Pd/SiO2 Catalyst". Catalysts 11, n.º 1 (16 de enero de 2021): 131. http://dx.doi.org/10.3390/catal11010131.

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Carbon monoxide (CO) oxidation is considered an important reaction in heterogeneous industrial catalysis and has been extensively studied. Pd supported on SiO2 aerogel catalysts exhibit good catalytic activity toward this reaction owing to their CO bond activation capability and thermal stability. Pd/SiO2 catalysts were investigated using carbon monoxide (CO) oxidation as a model reaction. The catalyst becomes active, and the conversion increases after the temperature reaches the ignition temperature (Tig). A normal hysteresis in carbon monoxide (CO) oxidation has been observed, where the catalysts continue to exhibit high catalytic activity (CO conversion remains at 100%) during the extinction even at temperatures lower than Tig. The catalyst was characterized using BET, TEM, XPS, TGA-DSC, and FTIR. In this work, the influence of pretreatment conditions and stability of the active sites on the catalytic activity and hysteresis is presented. The CO oxidation on the Pd/SiO2 catalyst has been attributed to the dissociative adsorption of molecular oxygen and the activation of the C-O bond, followed by diffusion of adsorbates at Tig to form CO2. Whereas, the hysteresis has been explained by the enhanced stability of the active site caused by thermal effects, pretreatment conditions, Pd-SiO2 support interaction, and PdO formation and decomposition.
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Pham, Thien, Viet Bui, Thi Phan y Ha Than. "CO oxidation over alumina monolith impregnated with oxides of copper and manganese". Journal of the Serbian Chemical Society 86, n.º 6 (2021): 615–24. http://dx.doi.org/10.2298/jsc200509004p.

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In this work, simple methods for the preparation of highly efficient heterogeneous nanocatalysts for the low-temperature oxidation of CO are described. The main advantages of the reaction are high yields. The catalysts based on oxides of copper and manganese supported on alumina monoliths were prepared by different methods: plasma corona discharge and wet impregnation. Structure and physical properties of catalysts were characterized by FT- -IR, XRD, TEM, EDX and TG/DTA. The results showed that the use of a plasma corona discharge at atmospheric pressure for the preparation of the catalysts resulted in smaller particle size and uniform dispersion when compared with the catalysts prepared by wet impregnation methods. The catalytic activities of these catalysts were investigated for complete oxidation of carbon monoxide (3000 ppm) to carbon dioxide in the air at atmospheric pressure. On a single oxide catalyst, 10CuO/monolith was better than 10MnO2/monolith under the same experimental conditions. With multi-oxide catalysts, all catalyst samples are more active than a single-oxide catalyst with the same impregnated content. In particular, the catalyst prepared by plasma corona discharge indicates the best oxidation capacity of carbon monoxide.
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Tada, S. y R. Kikuchi. "Mechanistic study and catalyst development for selective carbon monoxide methanation". Catalysis Science & Technology 5, n.º 6 (2015): 3061–70. http://dx.doi.org/10.1039/c5cy00150a.

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Bradley, David. "Core–shell catalysts tolerate carbon monoxide". Materials Today 16, n.º 11 (noviembre de 2013): 412. http://dx.doi.org/10.1016/j.mattod.2013.10.004.

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Hangas, J. W., G. W. Graham, R. W. McCabe y W. Chun. "Carbon Filament Growth on Fully Formulated Pd/Rh Automotive Catalysts". Microscopy and Microanalysis 6, S2 (agosto de 2000): 66–67. http://dx.doi.org/10.1017/s1431927600032827.

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Automotive exhaust catalysts are typically operated under stoichiometric conditions to minimize nitrogen oxide, hydrocarbon, and carbon monoxide pollutants. These catalysts do not form carbon filaments under normal operating conditions. In development of catalysts, however, a stabilization procedure is sometimes utilized on used catalysts (dynamometer or vehicle) to purge the catalyst of sulfur prior to measuring the catalytic activity in sweep and light-off testing. The stabilization procedure consists of running the catalyst under rich (excess fuel) conditions for 0.5hr. This study documents the existence of carbon filaments due to the stabilization procedure and discusses the effect of filaments on subsequent testing.Two separate catalysts were used in this study. The first was a 50,000 mile vehicle aged catalyst that had also been through the stabilization procedure and then sweep and light-off tested. The other was only dynamometer aged for 120hr at 850°C (1560°F).
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Qin, Ruixuan, Pei Wang, Pengxin Liu, Shiguang Mo, Yue Gong, Liting Ren, Chaofa Xu et al. "Carbon Monoxide Promotes the Catalytic Hydrogenation on Metal Cluster Catalysts". Research 2020 (17 de julio de 2020): 1–9. http://dx.doi.org/10.34133/2020/4172794.

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Size effect plays a crucial role in catalytic hydrogenation. The highly dispersed ultrasmall clusters with a limited number of metal atoms are one candidate of the next generation catalysts that bridge the single-atom metal catalysts and metal nanoparticles. However, for the unfavorable electronic property and their interaction with the substrates, they usually exhibit sluggish activity. Taking advantage of the small size, their catalytic property would be mediated by surface binding species. The combination of metal cluster coordination chemistry brings new opportunity. CO poisoning is notorious for Pt group metal catalysts as the strong adsorption of CO would block the active centers. In this work, we will demonstrate that CO could serve as a promoter for the catalytic hydrogenation when ultrasmall Pd clusters are employed. By means of DFT calculations, we show that Pdn n=2‐147 clusters display sluggish activity for hydrogenation due to the too strong binding of hydrogen atom and reaction intermediates thereon, whereas introducing CO would reduce the binding energies of vicinal sites, thus enhancing the hydrogenation reaction. Experimentally, supported Pd2CO catalysts are fabricated by depositing preestablished [Pd2(μ-CO)2Cl4]2- clusters on oxides and demonstrated as an outstanding catalyst for the hydrogenation of styrene. The promoting effect of CO is further verified experimentally by removing and reintroducing a proper amount of CO on the Pd cluster catalysts.
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Wu, Taichun, Mengyu Gan, Li Ma, Shuang Wei, Qinglan Fu, Yanling Yang, TingTing Li, Fei Xie, Wang Zhan y Xiujuan Zhong. "Pt-based nanoparticles decorated by phosphorus-doped CuWO4 to enhance methanol oxidation activity". New Journal of Chemistry 45, n.º 25 (2021): 11035–41. http://dx.doi.org/10.1039/d1nj01134k.

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DMFCs are promising power storage devices, while for methanol oxidation reaction, weak catalysis and carbon monoxide poisoning greatly limit their wide commercialization, so it's greatly necessary to exploit the anode catalysts with high performance.
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Dey, Subhashish, Ganesh Chandra Dhal, Devendra Mohan y Ram Prasad. "Study of Hopcalite (CuMnOx) Catalysts Prepared Through A Novel Route for the Oxidation of Carbon Monoxide at Low Temperature". Bulletin of Chemical Reaction Engineering & Catalysis 12, n.º 3 (28 de octubre de 2017): 393. http://dx.doi.org/10.9767/bcrec.12.3.882.393-407.

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Carbon monoxide (CO) is a poisonous gas, recognized as a silent killer. The gas is produced by incomplete combustion of carbonaceous fuel. Recent studies have shown that hopcalite group is one of the promising catalysts for CO oxidation at low temperature. In this study, hopcalite (CuMnOx) catalysts were prepared by KMnO4 co-precipitation method followed by washing, drying the precipitate at different temperatures (22, 50, 90, 110, and 120 oC) for 12 h in an oven and subsequent calcination at 300 oC in stagnant air, flowing air and in a reactive gas mixture of (4.5% CO in air) to do the reactive calcination (RC). The prepared catalysts were characterized by XRD, FTIR, SEM-EDX, XPS, and BET techniques. The activity of the catalysts was evaluated in a tubular reactor under the following conditions: 100 mg catalyst, 2.5% CO in air, total flow rate 60 mL/min and temperature varying from ambient to a higher value, at which complete oxidation of CO was achieved. The order of calcination strategies based on activity for hopcalite catalysts was observed to be as: RC > flowing air > stagnant air. In the kinetics study of CuMnOx catalyst prepared in RC conditions the frequency factor and activation energy were found to be 5.856×105 (g.mol)/(gcat.h) and 36.98 kJ/gmol, respectively. Copyright © 2017 BCREC Group. All rights reservedReceived: 28th December 2016; Revised: 19th April 2017; Accepted: 19th April 2017; Available online: 27th October 2017; Published regularly: December 2017How to Cite: Dey, S., Dhal, G.C., Mohan, D., Prasad, R. (2017). Study of Hopcalite (CuMnOx) Catalysts Prepared through A Novel Route for the Oxidation of Carbon Monoxide at Low Temperature. Bulletin of Chemical Reaction Engineering & Catalysis, 12 (3): 393-407 (doi:10.9767/bcrec.12.3.882.393-407)
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Tesis sobre el tema "Carbon monoxide Catalysts"

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Blank, Jan Hendrik. "Carbon monoxide hydrogenation using ruthenium catalysts". Thesis, University of St Andrews, 2012. http://hdl.handle.net/10023/3470.

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Kennedy, Sinead A. "Infrared studies of adsorption on model catalysts". Thesis, University of Reading, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250661.

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Mirzaei, Ali Akbar. "Low temperature carbon monoxide oxidation using copper containing catalysts". Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266493.

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Kureppadathu, Raman Sumesh. "Carbon monoxide/heterocycle copolymerisation : new catalysts and new biodegradable polymers". Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066575.

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Certains polymères synthétiques biodégradables ont montré des propriétés physico-chimiques aussi intéressantes que celles des plastiques issus du pétrole. Cependant, leur coût élevé dû au prix des matières premières ainsi qu’au faible nombre de voies de synthèse efficaces empêchent leur rentabilité. Une des alternatives serait le développement de méthodes de production viables économiquement par l’utilisation de catalyseurs productifs et de voies de synthèses à économie d’atomes. Ce manuscrit rassemble les travaux effectués durant la thèse sur une série de catalyseurs organométalliques hautement actifs pour la synthèse du poly(lactide), de nouvelles stratégies catalytiques pour la production du poly(3-hydroxybutyrate) et la polymérisation à économie d’atomes d’α-aminoacide-N-carboxyanhydrides pour la production de poly(α-peptides)
Many synthetic biodegradable polymers show competitive physical properties compared to petrochemically derived plastics. However, due to the low availability and high cost of renewable feed stocks or lack of efficient synthetic routes, their industrial production and successful commercial execution lacks economical feasibility. One way to improve the current situation is the implementation of cost efficient methods either by using productive catalysts or by atom-efficient synthetic methods. Here we report the discovery of a series of highly active organometallic catalysts for the synthesis of poly(lactide), new catalytic methodologies for the production of poly(3-hydroxybutyrate), and an atom-efficient polymerization of α-aminoacid-N-carboxyanhydrides to poly(α-peptides)
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Chan, Sze Chi. "Novel photodeposited catalysts for carbon monoxide oxidation and preferential oxidation of carbon monoxide in the presence of hydrogen (PROX)". Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 332 p, 2008. http://proquest.umi.com/pqdweb?did=1654493521&sid=5&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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Lloyd, Nicholas Charles. "Tin(IV) oxide based emission control catalysts". Thesis, University of Nottingham, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338436.

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Ying, Fang. "Au/CeO₂ based catalysts for catalytic oxidation of volatile organic compounds and carbon monoxide". HKBU Institutional Repository, 2010. http://repository.hkbu.edu.hk/etd_ra/1185.

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Ho, Ka Yee. "Nanostructured environmental catalysts for carbon monoxide and volatile organic compounds removal /". View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?EVNG%202006%20HO.

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Kikukawa, Shingo. "Development of late transition metal catalysts for olefin polymerization". Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325839.

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Yetisemiyen, Pelin. "Low Temperature Photocatalytic Oxidation Of Carbon Monoxide Over Palladium Doped Titania Catalysts". Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612466/index.pdf.

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The room temperature photocatalytic oxidation of carbon monoxide in excess air was examined over silica/titania and 0.1%palladium/silica/titania catalysts under UV irradiation. The experiments were conducted in batch re-circulated reactor with the initial 1000 ppm carbon monoxide in air and 0.5 g catalyst charge and the conversion of carbon monoxide to carbon dioxide was followed by FT-IR spectro-photometer. The change in gas composition in dark and under 36 Watts of UV irradiation exposed to a catalyst area of 12.4 centimeter square indicated both adsorption of carbon monoxide and conversion of carbon monoxide to carbon dioxide over the catalyst samples. The effect of catalyst composition (silica/titania) ratio and the presence of palladium oxide were investigated. The catalyst samples were synthesized by sol-gel technique and all samples were hydrothermally treated before calcination in air. The catalyst samples were characterized by XRD and nitrogen adsorption techniques. XRD results indicated that titania is comprised of pure anatase phase and palladium oxide preferantially dispersed over titania. BET surface area of the samples were observed to increase with silica loading and the BJH results showed isotherms of Type V v with H2 hysteresis loops. The highest carbon monoxide adsorption rate constant was achieved with pure silica with the highest surface area. Photocatalytic activity measurements indicated that carbon monoxide in excess air can be successfully oxidized at room temperature over the titania photocatalyts. Higher physisorption was observed over higher silica containing samples and higher oxidation activity was observed with increasing titania/silica ratio. The optimum titania/silica ratio was determined by the titania content and surface area of catalyst. The activity tests were also indicated that the addition of palladium oxide phase synergistically increased the adsorption and oxidation activity of the catalysts.
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Libros sobre el tema "Carbon monoxide Catalysts"

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T. R. H. E. Burm. Carbon monoxide hydrogenation over Ru-Cu/Al2O3 catalysts. Manchester: UMIST, 1996.

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Tata, A. Y. Activation of carbon monoxide and hydrogen gas mixture using intermetallic catalysts. Birmingham: University of Birmingham, 1990.

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Schryer, David R. Low-temperature CO-oxidation catalysts for long-life CO2 lasers: Collected papers from an international conference sponsored by the National Aeronautics and Space Administration, Washington, D.C. and the Royal Signals and Radar Establishment, Malvern, United Kingdom, and held at Langley Research Center, Hampton, Virginia, October 17-19, 1989. Hampton, Va: Langley Research Center, 1990.

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Al-Shammary, A. F. Y. Support effects with Ru, Co, and Pd catalysts for the hydrogen and carbon monoxide reaction. Birmingham: University of Birmingham, 1991.

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Doughty, Paul William. A study into the performance of catalysts for the hydrocracking of coal extracts under hydrogen and hydrogen/carbon monoxide atmospheres. Birmingham: University of Birmingham, 1988.

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Edward, Furimsky y Royal Society of Chemistry (Great Britain), eds. Catalysis in the refining of Fischer-Tropsch syncrude. Cambridge: RSC Publishing, 2010.

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Gardner, Steven Dwayne. High-performance CO oxidation catalysts engineered for CO2 Lasers. 1990.

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Advances in Fisher Tropsch Synthesis, Catalysts and Catalysis (Chemical Industries). CRC, 2010.

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9

Modeling of carbon monoxide oxidation kinetics over NASA carbon dioxide laser catalysts: Final project report. [Washington, DC: National Aeronautics and Space Administration, 1989.

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K, Marcinkowska, ed. Combined carbon monoxide and hydrogen eliminator catalyst for submarines. Chalk River, Ont: Chemical Engineering Branch, Chalk River Laboratories, 1993.

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Capítulos de libros sobre el tema "Carbon monoxide Catalysts"

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Bhore, N. A., K. B. Bischoff, W. H. Manogue y G. A. Mills. "Carbon Monoxide Hydrogenation over Rh—Molybdena—Alumina Catalysts". En Novel Materials in Heterogeneous Catalysis, 256–64. Washington, DC: American Chemical Society, 1990. http://dx.doi.org/10.1021/bk-1990-0437.ch023.

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Peden, Charles H. F. "Carbon Monoxide Oxidation on Model Single-Crystal Catalysts". En ACS Symposium Series, 143–59. Washington, DC: American Chemical Society, 1992. http://dx.doi.org/10.1021/bk-1992-0482.ch009.

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Drent, E., J. A. M. van Broekhoven, M. J. Doyle y P. K. Wong. "Palladium Catalysed Copolymerization of Carbon Monoxide with Olefins to Alternating Polyketones and Polyspiroketals". En Ziegler Catalysts, 481–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-79136-9_28.

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Goodwin, J. G., J. E. Lester, G. Marcelin y S. F. Mitchell. "Frequency Response Chemisorption Studies of Carbon Monoxide Hydrogenation Catalysts". En Catalyst Characterization Science, 67–78. Washington, DC: American Chemical Society, 1985. http://dx.doi.org/10.1021/bk-1985-0288.ch006.

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Anselment, Timo M. J., Manuela Zintl, Maria Leute, Rüdiger Nowack y Bernhard Rieger. "Late Transition Metal Catalyzed Co- and Terpolymerization of α-Olefins with Carbon Monoxide". En Handbook of Transition Metal Polymerization Catalysts, 591–621. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119242277.ch15.

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Worley, S. D. y C. H. Dai. "Effect of Potassium on the Hydrogenation of Carbon Monoxide and Carbon Dioxide Over Supported Rh Catalysts". En ACS Symposium Series, 133–46. Washington, DC: American Chemical Society, 1988. http://dx.doi.org/10.1021/bk-1988-0363.ch010.

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Wilkin, O. M., R. W. K. Allen, P. M. Maitlis, J. R. Tippetts, M. L. Turner, V. Tesar, A. Haynes, M. J. Pitt, Y. Y. Low y B. Sowerby. "High Throughput Testing of Catalysts for The Hydrogenation of Carbon Monoxide to Ethanol". En Principles and Methods for Accelerated Catalyst Design and Testing, 299–303. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0554-8_16.

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Anselment, Timo M. J., Manuela Zintl, Maria Leute, Rüdiger Nowack y Bernhard Rieger. "Late Transition Metal-Catalyzed Co- and Terpolymerization of α-Olefins with Carbon Monoxide-Polyketones: Synthesis and Modification". En Handbook of Transition Metal Polymerization Catalysts, 467–96. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470504437.ch13.

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Di Benedetto, Almerinda, Gianluca Landi y Luciana Lisi. "Preferential Oxidation of Carbon Monoxide in Hydrogen-Rich Streams over CuO/CeO2 Catalysts: How Nano (and Subnano) Structure Affects Catalytic Activity and Selectivity". En Nanostructured Catalysts for Environmental Applications, 79–112. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-58934-9_3.

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Rakitskaya, Tatyana, Ganna Dzhyga, Tatyana Kiose y Vitaliya Volkova. "Natural Nanobentonites as Supports in Palladium(II)–Copper(II) Catalysts for Carbon Monoxide Oxidation with Air Oxygen". En Springer Proceedings in Physics, 141–57. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52268-1_11.

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Actas de conferencias sobre el tema "Carbon monoxide Catalysts"

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Depcik, Christopher, Sudarshan Loya y Anand Srinivasan. "Adaptive Carbon Monoxide Kinetics for Exhaust Aftertreatment Modeling". En ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11173.

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Future emission standards are driving the need for advanced control of both Spark (SI) and Compression Ignition (CI) engines. However, even with the implementation of cooled Exhaust Gas Recirculation and Low Temperature Combustion (LTC), it is unlikely that in-cylinder combustion strategies alone will reduce emissions to levels below the proposed standards. As a result, researchers are developing complex catalytic aftertreatment systems to meet these tailpipe regulations for both conventional and alternative combustion regimes. Simulating these exhaust systems requires fast and accurate models suitable for significant changes in inlet conditions. Most aftertreatment devices contain Platinum Group Metals because of their widely documented beneficial catalysis properties; examples include Diesel Oxidation Catalysts, Three-Way Catalysts and Lean NOx Traps. There are kinetic mechanisms available for each of these devices, but often they do not extrapolate well to other formulations. For example, Carbon Monoxide (CO) levels entering a catalyst are significantly different between an SI and CI engine. In addition, modifying engine control to utilize LTC operation can result in an increase in CO levels due to lower combustion efficiency. This adversely affects the conversion capabilities of a catalytic device through increased levels of CO inhibition. Finally, catalyst loading and metal dispersion differences between devices often prohibit a direct extension of kinetic constants. As a result, mechanisms often need recalibration for correct modeling capabilities. In order to begin creating a more predictive kinetic mechanism, this paper simulates CO oxidation as a function of different inlet concentration levels and metal loadings. While aftertreatment devices contain many reactions, modeling of one fundamental reaction is a first step to determine the feasibility of adaptive kinetics. In addition, research into the history of the CO oxidation mechanism over platinum illustrates a more accurate rate expression to utilize in deference to current modeling activities. The authors calibrate this expression to experimental data taking into account significant changes in inlet conditions, metal loading and dispersion values. Model fidelity is determined through the simulation of additional data not part of the initial calibration efforts. In addition, the paper discusses strengths and weaknesses of the model along with how other researchers can help foster adaptive kinetic development.
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Kikuchi, Ryuji, Shohei Tada, Kohei Urasaki y Shigeo Satokawa. "Selective Carbon Monoxide Methanation Reaction Over Supported Ruthenium Catalysts". En Innovative Materials for Processes in Energy Systems 2010. Singapore: Research Publishing Services, 2010. http://dx.doi.org/10.3850/978-981-08-7614-2_impres065.

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Parks, James E., H. Douglas Ferguson, Aaron M. Williams y John M. E. Storey. "Lean NOx Trap Catalysis for NOx Reduction in Natural Gas Engine Applications". En ASME 2004 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/icef2004-0871.

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Reliable power generation and distribution is a critical infrastructure for the public and industry. Large-bore spark-ignited natural gas reciprocating engines are a reliable source of power generation. Lean operation enables efficient operation, and engines can conveniently be placed wherever natural gas resources are located. However, stricter emission regulations may limit the installation and use of more natural gas reciprocating engines if emissions cannot be reduced. Natural gas engine emissions of concern are generally methane, carbon monoxide, and oxides of nitrogen (NOx). Methane and carbon monoxide can be controlled by oxidation catalysts; however NOx emissions are difficult to control in lean exhaust conditions. One method of reducing NOx in lean exhaust conditions is lean NOx trap catalysis. Lean NOx trap technologies (also known as NOx adsorber catalysts, NOx storage and reduction catalysts, etc.) have demonstrated >90% NOx reduction for diesel reciprocating engines and natural gas turbines. In the work presented here, the feasibility of a lean NOx trap catalyst for lean burn natural gas reciprocating engines will be studied. Tests were conducted on a Cummins 8.3-liter engine on a dynamometer. The lean Nox trap catalyst was controlled in a valved exhaust system that utilized natural gas as the catalyst reductant. Oxidation and reformer catalysts were used to enhance utilization of methane for catalyst regeneration. The feasibility of this approach will be discussed based on the observed NOx reduction and associated fuel penalties.
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Nalette, Tim, Christopher Eldridge, Ping Yu, Gokhan Alptekin y John Graf. "Advanced Catalysts for the Ambient Temperature Oxidation of Carbon Monoxide and Formaldehyde". En 40th International Conference on Environmental Systems. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2010. http://dx.doi.org/10.2514/6.2010-6306.

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Luna, Bernadette, James Podolske, David Ehresmann, Jeanie Howard, Louis J. Salas, Lila Mulloth y Jay Perry. "Evaluation of Commercial Off-the-Shelf Ammonia Sorbents and Carbon Monoxide Oxidation Catalysts". En International Conference On Environmental Systems. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2008. http://dx.doi.org/10.4271/2008-01-2097.

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Patel, Sanjay y K. K. Pant. "Production of Hydrogen With Low Carbon Monoxide Formation Via Catalytic Steam Reforming of Methanol". En ASME 2005 3rd International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2005. http://dx.doi.org/10.1115/fuelcell2005-74141.

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The production of hydrogen was investigated in a fixed bed tubular reactor via steam reforming of methanol using CuO/ZnO/Al2O3 catalysts prepared by wet impregnation method and characterized by measuring surface area, pore volume, X-ray diffraction pattern and scanning electron microscopy photographs. The SRM was carried out at atmospheric pressure, temperature 493–573 K, steam to methanol molar ratio 1–1.8 and W/F 3 to 15. Effects of reaction temperature, contact-time, steam to methanol molar ratio and zinc content of catalyst on methanol conversion, selectivity and product yields were evaluated. The addition of zinc enhances the methanol conversion and hydrogen production. The excess steam promotes the methanol conversion and suppresses the carbon monoxide formation. Different strategies have been mentioned to minimize the carbon monoxide formation for the steam reforming of methanol to produce fuel cell grade hydrogen. Optimum operating conditions with appropriate composition of catalyst has been found to produce more selective hydrogen with minimum carbon monoxide. The reaction mechanism has been proposed based on the product distribution. The kinetic model available in literature fitted well with the experimental results.
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Iwaki, Hiroyuki, Gong Jin, Tomohiko Furuhata y Norio Arai. "Reaction Characteristics of Wastepaper Gasification With CO2 Catalyzed by Molten Carbonate Salts". En 2002 International Joint Power Generation Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/ijpgc2002-26076.

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In this paper, wastepaper gasification with steam and carbon dioxide was tested in the presence of molten carbonate salt catalysts. Reactions with steam or carbon dioxide were first compared. Hydrogen was mainly produced by gasification with steam, but no carbon monoxide was generated. For the case where carbon dioxide was used as a reactant instead of steam, generation of carbon monoxide greatly increased via the Boudouard reaction. Different ratios of mixtures of lithium, sodium and potassium carbonates were examined. Lithium was found to play a critical role in the various catalyst combinations. The reaction rate with respect to carbon conversion was approximately first order for low carbon conversions. The rate constants were investigated at different temperatures (923–1023K) and the activation energies were determined. In addition, the flexibility of this technique was examined with three different types of wastepaper. These results suggest the applicability of this process for the effective use of wastepaper and recovery of carbon dioxide.
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Lim, Emmanuel, Teeravit Visutipol, Wen Peng y Nico Hotz. "Flame-Made CuO/ZnO/Al2O3 Catalyst for Methanol Steam Reforming". En ASME 2013 7th International Conference on Energy Sustainability collocated with the ASME 2013 Heat Transfer Summer Conference and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/es2013-18388.

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In the present study, a catalyst produced by flame spray pyrolysis (FSP) was evaluated for its ability to produce hydrogen-rich gas mixtures. Catalyst particles fabricated by a novel flame spray pyrolysis method resulting in a highly active catalyst with high surface-to-volume ratio were compared to a commercially produced catalyst (BASF F3-01). Both catalysts consisted of CuO/ZnO/Al2O3 of identical composition (CuO 40wt%, ZnO 40wt%, Al2O3 20wt%). Reaction temperatures between 220 and 295 °C, methanol-water inlet flow rates between 2 and 50 μl/min, and reactor masses between 25 and 100 mg were tested for their effect on methanol conversion and the production of undesired carbon monoxide. 100% methanol conversion can be easily achieved within the operational conditions mentioned for this flame-made catalyst — at reactor temperatures of 255 °C (achievable with non-concentrating solar collectors) more than 80% methanol conversion can be reached for methanol-water inlet flow rates as high as 10 μl/min. The FSP catalyst demonstrates similar catalytic abilities as the BASF, produces a consistent gas composition and produces lower overall CO production. Furthermore, the FSP catalyst demonstrates a better suitability to fuel cell use through its higher resistance to degradation and smaller production of carbon monoxide over long-term use. In the present study, the merits of using flame spray pyrolysis to produce CuO/ZnO/Al2O3 methanol steam reforming catalysts are examined, and directly compared to catalysts that are commercially produced in bulk pellet form, and then ground and sieved. The comparison is performed from several different perspectives: catalytic activity and CO production at various temperatures and fuel inlet flow rates; surface and structure characteristics are determined via scanning electron and transmission electron microscopy; surface area characteristics are determined via BET tests.
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Hotz, Nico. "Flame-Made Catalyst for Bio-Methanol Steam Reforming". En ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-65425.

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In the present study, a catalyst produced by flame spray pyrolysis (FSP) was evaluated for its ability to produce hydrogen-rich gas mixtures. Catalyst particles fabricated by a novel flame spray pyrolysis method resulting in a highly active catalyst with high surface-to-volume ratio were compared to a commercially produced catalyst (BASF F3-01). Both catalysts consisted of CuO/ZnO/Al2O3 of identical composition (CuO 40wt%, ZnO 40wt%, Al2O3 20wt%). Reaction temperatures between 220 and 295 °C, methanol-water inlet flow rates between 2 and 50 μl/min, and reactor masses between 25 and 100 mg were tested for their effect on methanol conversion and the production of undesired carbon monoxide. 100% methanol conversion can be easily achieved within the operational conditions mentioned for this flame-made catalyst — at reactor temperatures of 255 °C (achievable with non-concentrating solar collectors) more than 80% methanol conversion can be reached for methanol-water inlet flow rates as high as 10 μl/min. The FSP catalyst demonstrates similar catalytic abilities as the BASF, produces a consistent gas composition and produces lower overall CO production. Furthermore, the FSP catalyst demonstrates a better suitability to fuel cell use through its higher resistance to degradation and smaller production of carbon monoxide over long-term use. In the present study, the merits of using flame spray pyrolysis to produce CuO/ZnO/Al2O3 methanol steam reforming catalysts are examined, and directly compared to catalysts that are commercially produced in bulk pellet form, and then ground and sieved. The comparison is performed from several different perspectives: catalytic activity and CO production at various temperatures and fuel inlet flow rates; surface and structure characteristics are determined via scanning electron and transmission electron microscopy; surface area characteristics are determined via Brunauer-Emmett-Teller (BET) tests.
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Luna, Bernadette, George Somi, James Winchester, Jeffrey Grose, Lila Mulloth y Jay Perry. "Evaluation of Commercial Off-the-Shelf Sorbents & Catalysts for Control of Ammonia and Carbon Monoxide". En 40th International Conference on Environmental Systems. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2010. http://dx.doi.org/10.2514/6.2010-6062.

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Informes sobre el tema "Carbon monoxide Catalysts"

1

Keehan, D. y J. Richardson. Carbon monoxide rich methanation kinetics on supported rhodium and nickel catalysts. Office of Scientific and Technical Information (OSTI), agosto de 1989. http://dx.doi.org/10.2172/5622217.

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Bhore, N. A. Modifiers in rhodium catalysts for carbon monoxide hydrogenation: Structure-activity relationships. Office of Scientific and Technical Information (OSTI), mayo de 1989. http://dx.doi.org/10.2172/6119986.

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Mr. Paul Chin, Dr. Xiaolei Sun, Professor George W. Roberts, Professor James J. Spivey, Mr. Amornmart Sirijarhuphan, Jr Dr. James G. Goodwin y Dr. Richard W. Rice. REFORMULATION OF COAL-DERIVED TRANSPORTATION FUELS: SELECTIVE OXIDATION OF CARBON MONOXIDE ON METAL FOAM CATALYSTS. Office of Scientific and Technical Information (OSTI), diciembre de 2002. http://dx.doi.org/10.2172/810450.

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Paul Chin, George W. Roberts y James J. Spivey. REFORMULATION OF COAL-DERIVED TRANSPORTATION FUELS: SELECTIVE OXIDATION OF CARBON MONOXIDE ON METAL FOAM CATALYSTS. Office of Scientific and Technical Information (OSTI), diciembre de 2003. http://dx.doi.org/10.2172/822768.

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Paul Chin, Xiaolei Sun, George W. Roberts, Amornmart Sirijarhuphan, Sourabh Pansare, James G. Goodwin Jr, Richard W. Rice y James J. Spivey. REFORMULATION OF COAL-DERIVED TRANSPORTATION FUELS: SELECTIVE OXIDATION OF CARBON MONOXIDE ON METAL FOAM CATALYSTS. Office of Scientific and Technical Information (OSTI), junio de 2005. http://dx.doi.org/10.2172/843092.

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VanderWiel, David P. A kinetic study on the adsorption and reaction of hydrogen over silica-supported ruthenium and silver-ruthenium catalysts during the hydrogenation of carbon monoxide. Office of Scientific and Technical Information (OSTI), febrero de 1999. http://dx.doi.org/10.2172/348889.

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Jernigan, Glenn Geoffrey. Carbon monoxide oxidation over three different states of copper: Development of a model metal oxide catalyst. Office of Scientific and Technical Information (OSTI), octubre de 1994. http://dx.doi.org/10.2172/10107712.

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Technology development for iron Fischer-Tropsch catalysis. [Pretreatment of catalyst in carbon monoxide]. Office of Scientific and Technical Information (OSTI), enero de 1991. http://dx.doi.org/10.2172/7233233.

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