Catalytic Oxidation of Ammonia to Nitrogen and Water PDF Download
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Author: Sandra Lenihan
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Sandra Lenihan
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Finbarr O'Regan
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Lu Gang
Publisher:
ISBN: 9789038626536
Category :
Languages : en
Pages : 135
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Author: J.P. Bonnelle
Publisher: Springer Science & Business Media
ISBN: 9400971605
Category : Science
Languages : en
Pages : 571
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Book Description
In the field of heterogeneous catalysis. it is convenient to distinguish. in a perfectly unjustified and over··simplified way. bet:leen metal catalysts. 2nd the other catalysts. The fj.J"st are easy to define : they are those in which a reduced metal is the active phase. It is thus easy to circumscribe. by exclusion, the other class namely the "non-metals". We have adopted this definition for the sake of our colleagues working on catalysis by metals, and to avoid a lengthy title like "sm' face pl"operties and catalysts by transi tion metal oxides. sulftdes, carbides, nitriles, etc. Defined in this manner, non-metal catalysts represented, in 1980, 84 wt. % of the industrial heterogeneous catalysts. To be more specific, this proportion corresponds to catalysts which, under the working conditions in the industrial ?lant. contain their catalytically active metallic elements in a non-reduced state. It should however be recalled that most metal catalysts are supported on oxides, which, often, repl'esent over 90% (sometimes 99.4% in the case of the platinum reforming catalysts) of the total weight.
Author: Magdalena Jablonska
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659617270
Category :
Languages : en
Pages : 72
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Book Description
An increasing amount of ammonia slip affects DeNOx technology used to reduce nitrogen oxides emissions from power plants and other stationary sources of NOx emissions, heavy trucks, gasoline and Diesel passenger cars. The control and removal of ammonia emissions in waste streams are required. The process of the selective catalytic oxidation of ammonia into nitrogen and water vapour is one of the most promising methods for elimination of toxic ammonia from flue gases. As catalysts for the process hydrotalcite-derived mixed metal oxides were tested. The studies performed in the frame of the research were presented in four scientific papers (Catalysis Letters, Applied Catalysis B: Environmental, Journal of Thermal Analysis and Calorimetry, Chemik). Mixed metal oxides have been found to be active, selective to nitrogen and stable in ammonia oxidation. Their activity and selectivity strongly depend on chemical and phase composition and their redox properties. Optimum composition of the catalysts guaranteeing high catalytic performance was proposed. The internal SCR (i-SCR) mechanism was investigated for the reaction performed over the studied catalysts.
Author: Esbon Y. Titus
Publisher:
ISBN:
Category :
Languages : en
Pages : 146
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Author: Huazhang Liu
Publisher: World Scientific
ISBN: 9814518808
Category : Science
Languages : en
Pages : 895
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This book provides a review of worldwide developments in ammonia synthesis catalysts over the last 30 years. It focuses on the new generation of Fe1-xO based catalysts and ruthenium catalysts — both are major breakthroughs for fused iron catalysts. The basic theory for ammonia synthesis is systematically explained, covering topics such as the chemical components, crystal structure, preparation, reduction, performance evaluation, characterization of the catalysts, the mechanism and kinetics of ammonia synthesis reaction. Both theory and practice are combined in this presentation, with emphasis on the research methods, application and exploitation of catalysts.The comprehensive volume includes an assessment of the economic and engineering aspects of ammonia plants based on the performance of catalysts. Recent developments in photo-catalysis, electro-catalysis, biocatalysis and new uses of ammonia are also introduced in this book.The author, Professor Huazhang Liu, has been engaged in research and practice for more than 50 years in this field and was the inventor of the first Fe1-xO based catalysts in the world. He has done a lot of research on Fe3O4 based- and ruthenium based-catalysts, and has published more than 300 papers and obtained 21 patents during his career.
Author: Nicole N. Becker
Publisher:
ISBN:
Category :
Languages : en
Pages : 78
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Author: Thomas J. Schriber
Publisher:
ISBN:
Category :
Languages : en
Pages : 164
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Author: J.R. Jennings
Publisher: Springer Science & Business Media
ISBN: 1475795920
Category : Science
Languages : en
Pages : 462
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Book Description
The phenomenon of catalysis is found in many homogeneous and heterogeneous systems undergoing chemical change, where it effects the rates of approach to the equilibrium state in processes as diverse as those found in the stars, the earth's mantle, living organisms, and the various chemistries utilized by industry. The economies and the living standards of both developed and developing countries depend to varying degrees upon the efficacy of their chemical industries. Con sequently, this century has seen a wide exploration and expansion of catalytic chemistry together with an intensive investigation of specific, essential processes like those contributing to life-supporting agricultures. Prime among the latter must surely be the "fixation" of atmospheric nitrogen by catalytic hydrogenation to anhydrous ammonia, still the preferred synthetic precursor of the nitrogenous components of fertilizers. In each decade contemporary concepts and techniques have been used to further the understanding, as yet incomplete, of the catalyst, the adsorbates, the surface reactions, and the technology of large-scale operation. The contributors to the present volume review the state of the art, the science, and the technology; they reveal existing lacunae, and suggest ways forward. Around the turn of the century, Sabatier's school was extending the descriptive catalytic chemistry of hydrogenation by metals to include almost all types of multiple bond. The triple bond of dinitrogen, which continued to be more resistant than the somewhat similar bonds in carbon monoxide and ethyne, defied their efforts.
