Download or read book Production of Hydrogen Bromide by Bromine methane Reactions at Elevated Temperature written by Richard S. Larson and published by . This book was released on 2003 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrogen bromide is a potentially useful intermediate for hydrogen production by electrolysis because it has a low cell potential and is extremely soluble in water. Processes have been proposed to exploit these properties, but among the important issues to be resolved is the efficiency of HBr production from hydrocarbon precursors. This investigation evaluated a fundamental facet of such a technology by studying the reaction of methane and bromine at elevated temperature to determine the yield and kinetics of HBr formation. Laboratory experimentation and computational chemistry were combined to provide a description of this reaction for possible application to reactor design at a larger scale. Experimental studies with a tubular flow reactor were used to survey a range of reactant ratios and reactor residence times at temperatures between 500 C and 800 C. At temperatures near 800 C with excess methane, conversions of bromine to HBr exceeded 90% and reaction products included solid carbon (soot) in stoichiometric amounts. At lower temperatures, HBr conversion was significantly reduced, the products included much less soot, and the formation of bromocarbon compounds was indicated qualitatively. Calculations of chemical equilibrium behavior and reaction kinetics for the experimental conditions were performed using the Sandia CHEMKIN package. An elementary multistep mechanism for the gas-phase chemistry was used together with a surface mechanism that assumed facile deposition of radical species at the reactor walls. Simulations with the laminar-flow boundary-layer code of the CHEMKIN package gave reasonable agreement with experimental data.
Download or read book Decomposition of Hydrogen Bromide Using Iron Bromide and Magnetite written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A means of thermochemically decomposing hydrogen bromide has been investigated experimentally using the reaction between magnetite and HBr as the bromine producing step. A high yield of Br2 was formed in a short time (90% in 0.5 h). For the hydrogen producing step, the direct hydrolysis of ferrous bromide was confirmed as having an unfavorable equilibrium (3.61 x 10−3 at 849°K). However, introduction of magnesium oxide into an aqueous solution of FeBr2 and subsequent heating of the insoluble product gave H2 and Fe3O4 in good yields. Further, Br2 could be regenerated from this Fe3O4 by treatment with HBr. All the reactions were demonstrated to be fast, going to about 85% completion. The main drawback is the heat required to dry and dehydrate magnesium bromide in order to reform MgO by hydrolysis. These reactions are discussed within the framework of a thermochemical cycle.
Download or read book Ullmann s Fine Chemicals written by Wiley-VCH and published by John Wiley & Sons. This book was released on 2014-01-07 with total page 1905 pages. Available in PDF, EPUB and Kindle. Book excerpt: A compilation of 76 articles from the ULLMANN's Encyclopedia of Industrial Chemistry, this three-volume handbook contains a wealth of information on the production and industrial use of more than 2,000 of the most important fine chemicals, from "Alcohols" to "Urea Derivatives". Chemical and physical characteristics, production processes and production figures, main uses, toxicology and safety information are all found here in one single resource.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1973 with total page 1052 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of Chemical Reactions Caused by High Energy Bromine and Tritium Atoms written by Myran Charles Sauer and published by . This book was released on 1959 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Method for the Production of Bromine from Hydrogen Bromide written by N. Koketsu and published by . This book was released on 1977 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cambridge International AS and A Level Chemistry written by Peter Cann and published by Hodder Education. This book was released on 2015-03-06 with total page 1254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Endorsed by Cambridge Assessment International Education for full syllabus coverage Foster a deeper understanding of theoretical concepts through clear guidance and opportunities for self-assessment throughout; covers the entire Cambridge International AS & A Level Chemistry syllabus (9701). - Navigate the different routes through the course with ease with clearly divided sections for AS and A Level. - Focus learning with learning outcomes clearly defined at the beginning of each section - Test knowledge and understanding with past paper and exam-style questions - Address the Key Concepts in the syllabus, which are clearly highlighted throughout the course The Revision and Practice CD included with every Student's Book provides interactive tests, summaries of each topic and advice on examination techniques.
Download or read book Ullmann s Encyclopedia of Industrial Chemistry written by and published by . This book was released on 2003 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Exchange Reaction of Gaseous Bromine and Hydrogen Bromide written by Wade Lee Callender and published by . This book was released on 1951 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book TID written by and published by . This book was released on 1954 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wiley Guide to Chemical Incompatibilities written by Richard P. Pohanish and published by John Wiley & Sons. This book was released on 2005-03-11 with total page 1296 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Second Edition of the Wiley Guide to Chemical Incompatibilities provides chemists, technicians, and engineers with a thorough, lightening-quick resource to use during experimental preparation and in the event of an emergency. Includes: Hard-to-find data on over 11,000 chemical compounds 2,000 more chemical listings than the First Edition Alphabetical organization providing concise incompatibility profiles for thousands of commonly used commercial chemcials CAS Numbers to eliminate confusion among similar synonym names. A glossary of general chemical terms This expanded Second Edition, set out in a convenient, easy-to-use format, is an essential guide for all safety, first-response, and plant management professionals working with chemical materials.
Download or read book The New Werner Twentieth Century Edition of the Encyclopaedia Britannica written by and published by . This book was released on 1906 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Part I Exchange Reaction of Gaseous Bromine and Hydrogen Bromide Part II Exchange Reactions Between Gaseous Organic Bromides Bromine and Hydrogen Bromide written by Laurence C. Liberatore and published by . This book was released on 1941 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanisms in Organic Reactions written by Richard A. Jackson and published by Royal Society of Chemistry. This book was released on 2004 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: An increasing knowledge and understanding of organic reaction mechanisms has been a major factor in the rapid advance of organic chemistry, biochemistry and pharmacology in the last century. It therefore forms a vital part of today's chemistry courses. Mechanisms in Organic Reactions helps students to make sensible proposals for the mechanisms of particular organic reactions, and then how to distinguish between different possible mechanisms. Techniques for this include product studies, kinetics, and the identification of intermediates. Three chapters on intermediates discuss likely points of attack on molecules by anions, radicals and cations, and the important role of acid- and base-catalysed reactions and radical chain reactions. The prediction of reaction rates and the effects of structural changes on reaction rate are also covered. It concludes with a discussion of molecular reactions, both thermal and photochemical - reactions which provide deep and beautiful insights into the reasons why some reactions go and others do not, and why the majority of real-life reactions involve multi-step processes. The book provides both illuminating insights into fundamental chemistry, and also practical value for students who will go on to teach, research, or be involved in other scientific roles (administration, policy making or journalism). Ideal for the needs of undergraduate chemistry students, Tutorial Chemistry Texts is a major series consisting of short, single topic or modular texts concentrating on the fundamental areas of chemistry taught in undergraduate science courses. Each book provides a concise account of the basic principles underlying a given subject, embodying an independent-learning philosophy and including worked examples.
Download or read book Kirk Othmer Concise Encyclopedia of Chemical Technology 2 Volume Set written by Kirk-Othmer and published by John Wiley & Sons. This book was released on 2007-07-16 with total page 2762 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an easily-accessible two-volume encyclopedia summarizing all the articles in the main volumes Kirk-Othmer Encyclopedia of Chemical Technology, Fifth Edition organized alphabetically. Written by prominent scholars from industry, academia, and research institutions, the Encyclopedia presents a wide scope of articles on chemical substances, properties, manufacturing, and uses; on industrial processes, unit operations in chemical engineering; and on fundamentals and scientific subjects related to the field.
Download or read book Production and Separation of U233 written by Leonard I. Katzin and published by . This book was released on 1952 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemistry Homework for OCR A for Double and Separate Awards written by Gareth Pritchard and published by Heinemann. This book was released on 2001 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Howework activites for OCR A Chemistry specifications
