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Book The Kinetics of Reaction Between Nitrous Oxide and Hydrogen at a Silver Surface

Download or read book The Kinetics of Reaction Between Nitrous Oxide and Hydrogen at a Silver Surface written by Carlisle Monroe Thacker and published by . This book was released on 1934 with total page 1304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Catalytic Reduction of Nitrogen Dioxide by Hydrogen

Download or read book Catalytic Reduction of Nitrogen Dioxide by Hydrogen written by Ali Amirnazmi and published by . This book was released on 1968 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Mitigation of Hydrogen by Oxidation Using Nitrous Oxide and Noble Metal Catalysts

Download or read book Mitigation of Hydrogen by Oxidation Using Nitrous Oxide and Noble Metal Catalysts written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This test studied the ability of a blend of nuclear-grade, noble-metal catalysts to catalyze a hydrogen/nitrous oxide reaction in an effort to mitigate a potential hydrogen (H[sub 2]) gas buildup in the Hanford Site Grout Disposal Facility. For gases having H[sub 2] and a stoichiometric excess of either nitrous oxide or oxygen, the catalyst blend can effectively catalyze the H[sub 2] oxidation reaction at a rate exceeding 380 [mu]moles of H[sub 2] per hour per gram of catalyst ([mu]mol/h/g) and leave the gas with less than a 0.15 residual H[sub 2] Concentration. This holds true in gases with up to 2.25% water vapor and 0.1% methane. This should also hold true for gases with up to 0.1% carbon monoxide (CO) but only until the catalyst is exposed to enough CO to block the catalytic sites and stop the reaction. Gases with ammonia up to 1% may be slightly inhibited but can have reaction rates greater than 250 [mu]mol/h/g with less than a 0.20% residual H[sub 2] concentration. The mechanism for CO poisoning of the catalyst is the chemisorption of CO to the active catalyst sites. The CO sorption capacity (SC) of the catalyst is the total amount of CO that the catalyst will chemisorb. The average SC for virgin catalyst was determined to be 19.3 [plus-minus] 2.0 [mu]moles of CO chemisorbed to each gram of catalyst ([mu]mol/g). The average SC for catalyst regenerated with air was 17.3 [plus-minus] 1.9 [mu]mol/g.

Book Catalytic Reduction of NO and N2O with Hydrogen in Water by Polymer Protected Palladium Nanoparticles

Download or read book Catalytic Reduction of NO and N2O with Hydrogen in Water by Polymer Protected Palladium Nanoparticles written by Kathleen H. Kelley and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitric oxide (NO) and nitrous oxide (N2O) are important components of the global nitrogen cycle. They are intermediates or end products for natural bacterial processes such as nitrification and denitrification, and are formed in increasing amounts from anthropogenic sources such as increased bacterial denitrification of fertilizers. Both are contributors to ozone destruction, and N2O is a potent greenhouse gas. Reduction of both gases to harmless dinitrogen by nanoparticulate palladium catalysts is a promising method for treating NO and N2O formed in water. However, creating a better understanding of the method of catalytic activity and corresponding selectivity is critical for developing an optimal process. We have synthesized a water-soluble Pd/PVP colloid (PVP= poly(N-vinyl-2-pyrrolidone) by an alcohol reduction method. Nitric oxide and nitrous oxide reduction activities were determined by monitoring the headspace composition in a reaction flask by GC-MS. NO reduction rates were considerably faster than N2O reduction rates, and essentially no production of N2 was observed until all of the NO had been reduced to N2O. This is consistent with expectations that the binding constant of NO to the palladium nanoparticle surface is considerably larger than that of N2O. Molar balances and post-experimental ammonia analysis confirmed that no side production of ammonia was occurring. Further studies showed that no reaction occurred with an air-exposed catalyst until hydrogen added in a helium atmosphere was sufficient to remove oxygen from the surface. Hydrogen held by the Pd nanoparticles was modified by controlled heating under helium in order to confirm the need for hydrogen in N2 production from N2O.

Book The Kinetics of Reaction Between Nitrous Oxide and Hydrogen at a Sliver Surface

Download or read book The Kinetics of Reaction Between Nitrous Oxide and Hydrogen at a Sliver Surface written by Carlisle Monroe Thacker and published by . This book was released on 1934 with total page 1304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Kinetics of the Catalytic Reduction of Nitric Oxide with Hydrogen

Download or read book Kinetics of the Catalytic Reduction of Nitric Oxide with Hydrogen written by Lloyd Vernon J. and published by . This book was released on 1965 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Selective Catalytic Reduction of Nitrous Oxide by Propylene Over Supported Rhodium Catalysts

Download or read book Selective Catalytic Reduction of Nitrous Oxide by Propylene Over Supported Rhodium Catalysts written by Tammie Yvonne Robinson and published by . This book was released on 1998 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concern about the 150 years atmospheric lifetime for nitrous oxide led to this study of effect selective catalytic reduction of nitric oxide by propylene over supported rhodium catalysts. Nitrous oxide is a suspected participant in stratospheric ozone destruction and global warming. Effects of support, concentration, and temperature were addressed on selective catalytic reduction.

Book Selective Catalytic Reduction SCR of Nitric Oxide NO with Ammonia Over Vanadia based and Pillared Interlayer Clay based Catalysts

Download or read book Selective Catalytic Reduction SCR of Nitric Oxide NO with Ammonia Over Vanadia based and Pillared Interlayer Clay based Catalysts written by Hyuk Jin Oh and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The selective catalytic reduction (SCR) of nitric oxide (NO) with ammonia over vanadia-based (V2O5-WO3/TiO2) and pillared interlayer clay-based (V2O5/Ti-PILC) monolithic honeycomb catalysts using a laboratory laminar-flow reactor was investigated. The experiments used a number of gas compositions to simulate different combustion gases. A Fourier transform infrared (FTIR) spectrometer was used to determine the concentrations of the product species. The major products were nitric oxide (NO), ammonia (NH3), nitrous oxide (N2O), and nitrogen dioxide (NO2). The aim was to delineate the effect of various parameters including reaction temperature, oxygen concentration, NH3-to-NO ratio, space velocity, heating area, catalyst arrangement, and vanadium coating on the removal of nitric oxide. The investigation showed that the change of the parameters significantly affected the removals of NO and NH3 species, the residual NH3 concentration (or NH3 slip), the temperature of the maximum NO reduction, and the temperature of complete NH3 conversion. The reaction temperature was increased from the ambient temperature (25°C) to 450°C. For both catalysts, high NO and NH3 removals were obtained in the presence of a small amount of oxygen, but no significant influence was observed from 0.1 to 3.0% O2. An increase in NH3-to-NO ratio increased NO reduction but decreased NH3 conversions. For V2O5-WO3/TiO2, the decrease of space velocity increased NO and NH3 removals and broadened the active temperature window (based on NO> 88% and NH3> 87%) about 50°C. An increase in heating area decreased the reaction temperature of the maximum NO reduction from 350 to 300 ʻC, and caused the active reaction temperature window (between 250 and 400 ʻC) to shift toward 50 ʻC lower reaction temperatures (between 200 and 350°C). The change of catalyst arrangements resulted slight improvement for NO and NH3 removals, therefore, the change might contribute to more gas removals. The catalyst with extra vanadium coating showed higher NO reductions and NH3 conversions than the catalyst without the extra vanadium coating.

Book The Catalytic Reduction of Nitric Oxide with Ammonia on Etched Metal Surfaces

Download or read book The Catalytic Reduction of Nitric Oxide with Ammonia on Etched Metal Surfaces written by Ronald Jackson Willey and published by . This book was released on 1984 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Study of the Oxidation of Ammonia and the Selective Catalytic Reduction of Nitric Oxide by Ammonia in the Presence of Oxygen on an Iron Oxide chromium Oxide vanadium Pentoxide Catalyst Supported on Alumina

Download or read book A Study of the Oxidation of Ammonia and the Selective Catalytic Reduction of Nitric Oxide by Ammonia in the Presence of Oxygen on an Iron Oxide chromium Oxide vanadium Pentoxide Catalyst Supported on Alumina written by Wing Cheong Wong and published by . This book was released on 1979 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Comparative Study of the H2 assisted Selective Catalytic Reduction of Nitric Oxide by Propene Over Noble Metal Pt Pd Ir Al2O3 Catalysts

Download or read book A Comparative Study of the H2 assisted Selective Catalytic Reduction of Nitric Oxide by Propene Over Noble Metal Pt Pd Ir Al2O3 Catalysts written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: