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عنوان فارسی مقاله:
تاثیر دی اکسید گوگرد بر فعالیت مرتبه ای کاتالیزور مبتنی بر پالادیم در احتراق متان
عنوان انگلیسی مقاله:
The effect of sulfur dioxide on the activity of hierarchical Pd-based catalysts in methane combustion
سال انتشار : 2017
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مقدمه انگلیسی مقاله:
1. Introduction
Regulations for automotive emissions are becoming more stringent in order to mitigate the effects of transportation on air quality, environment and human health. Electric vehicles and hydrogenpowered, fuel-cell cars may solve these problems in the future, but hydrocarbon fuels will continue to be used in the near term. Because of fuel availability and improved efficiency, there will likely be a move towards more Natural Gas Vehicles (NGVs) and diesel-powered cars; but these both have the disadvantage that methane, a greenhouse gas, is present in significant amounts intheir exhausts. This represents a serious challenge for complying with upcoming regulations. Low-temperature methane catalytic combustion is also important for gas turbines fueled with natural gas. Therefore, better methane-oxidation catalysts, with high activities at low temperatures and better stability, are needed. Palladium-based catalysts are the most active materials for oxidation of methane at low temperatures, especially when they are promoted by the presence of reducible oxides such as CeO2 [1–5]. However, they suffer from deactivation under realistic conditions, mainly because of sintering of the metal or support and because of thepresence ofpoisons inthe gas feed,including water vapor, sulfur oxides and phosphorous compounds [6–13]. SO2, which is produced by the oxidation of sulfur compounds present in fuels and in lubricating additives [14,15], is a particularly serious poison in catalytic converters. Despite the continuing reduction of sulfur in thefuels (The Ultra-Low Sulfur Diesel (ULSD) regulation established a 15 ppm sulfur content for diesel fuel in 2006 [16]), long-term exposure to low concentrations of SO2 is still detrimentalto the catalytic activity of the exhaust after-treatment catalysts [15,17,18]. Under lean conditions and at temperatures above 200 ◦C, the presence of SO2 in the exhaust leads to formation of sulfate species on both the support and the active phase [19,20]. One of the possible pathways for the formation of sulfates involves SO2 oxidation to SO3 by O2 (1) and subsequent adsorption of SO3 on the metal-oxide surface (2).
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کلمات کلیدی:
Low temperature oxidation of methane over Pd-based catalysts - Effect ... https://www.researchgate.net/.../222214777_Low_temperature_oxidation_of_methane_... ... methane over Pd-based catalysts - Effect of support oxide on the combustion activity ... Cargnello et al. reported a hierarchical design of Pd@CeO 2 core-shell ... The effect of sulfur dioxide on the activity of hierarchical Pd-based ... https://arts.units.it/handle/11368/2890063 - Translate this page Titolo: The effect of sulfur dioxide on the activity of hierarchical Pd-based catalysts in methane combustion. Autori interni: MONAI, MATTEO · MONTINI, TIZIANO Combustion of Methane over Palladium-Based Catalysts: Support ... pubs.acs.org/doi/abs/10.1021/jp2119668?src=recsys Apr 10, 2012 - Palladium-based catalysts are attractive for methane combustion at low .... dioxide on the activity of hierarchical Pd-based catalysts in methane ... Combustion of Methane over Palladium-Based Catalysts: Catalytic ... pubs.acs.org/doi/abs/10.1021/jp212236e by WR Schwartz - 2012 - Cited by 56 - Related articles Apr 9, 2012 - Palladium-based catalysts supported on metal oxides are attractive for ... Stability and Methane-Oxidation Activity of Pd/Al2O3 Catalysts by ... The effect of sulfur dioxide on the activity of hierarchical Pd-based ... https://www.infona.pl/.../bwmeta1.element.elsevier-00ddac5b-a5d3-38ce-b191-308b111... by M Monai - 2017 - Cited by 2 - Related articles SO 2 poisoning of methane oxidation over alumina-supported, Pd@Ce x Zr 1−x O 2 nanoparticle catalysts was systematically studied by means of advanced ... Chen Chen (0000-0003-4016-1944) - ORCID | Connecting Research ... orcid.org/0000-0003-4016-1944 The effect of sulfur dioxide on the activity of hierarchical Pd-based catalysts in methane combustion Applied Catalysis B: Environmental. 2017-03 | journal-article. C Chen - Google Scholar Citations scholar.google.com/citations?user=jm8hP-IAAAAJ&hl=en University of pennsylvania - seas.upenn.edu Methane Catalytic Combustion over Hierarchical Pd@ CeO2/Si‐Al2O3: Effect of ... of sulfur dioxide on the activity of hierarchical Pd-based catalysts in methane ... neplatný dotaz WOS advanced search query (RED – proceedings ... physics.mff.cuni.cz/kfpp/php/journal-bibtex.php?clanek=1670 ... R.J. AND Fornasiero, P.}, title = {The effect of sulfur dioxide on the activity of hierarchical Pd-based catalysts in methane combustion}, journal = {Appl. Catal.
