Download or read book R action d oxydation s lective de l hydrog ne sulfur H2S en soufre l mentaire written by Jean-Mario Nhut and published by . This book was released on 2003 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les travaux réalisés sur la réaction de désulfuration à haute température ont permis de contrôler sélectivement la localisation de la phase active par rapport au support, grâce à la mise au point d'une nouvelle méthode d'imprégnation (appelée imprégnation bi-phasique). Cette méthode est basée sur les propriétés de dualité de surface du SiC (hydrophile, hydrophobe), et permet de déposer les particules d'oxyde de fer (phase active) exclusivement sur les zones purement SiC de nature hydrophobe, qui s'avèrent être localisées à l'extérieur des pores du matériau et permettent une meilleure accessibilité de la phase active. Au cours de la réaction (T = 230-240°C), la phase active à base d'oxyde de fer se transforme sous flux réactionnel en une phase oxysulfure de fer. Cette phase très active et sélective s'avère d'une extrême stabilité tout au long de la réaction (test >1000 h) et quel que soit la nature du mélange réactionnel, i.e. en présence ou non d'impuretés (H2, CO2, SO2, CO, NH3).La découverte de nouveaux matériaux comme les nanostructures de carbone (nanofibres, nanotubes) nous ont permis de développer de nouveaux catalyseurs, à base de NiS2, capables d'oxyder sélectivement à 60 °C l'H2S en soufre élémentaire avec des rendements en soufre extrêmement élevés, et ce avec des vitesses spatiales relativement élevées (WHSV = 0,03 h-1). Les résultats obtenus ont montré l'importance de ces supports sur l'activité désulfurante et leur grande capacité à stocker le soufre solide. Sur les nanotubes, l'hypothèse d'un effet de confinement induit par leur morphologie tubulaire, est avancée tandis que sur les composites nanofibrés, la forte activité observée est attribuée à l'importante surface externe due à leur taille nanoscopique. Un mode de dépôt particulier du soufre solide est avancé pour expliquer l'activité des catalyseurs et leur grande capacité à stocker le soufre solide pendant la réaction (existence d'une dualité de surface hydrophile/ hydrophobe).
Download or read book Autoxidation of Sulphur Compounds written by Wanda Pasiuk-Bronikowska and published by Prentice Hall. This book was released on 1992 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Le soufre written by Clément Duval and published by . This book was released on 1967 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ehrlich s Geomicrobiology written by Henry Lutz Ehrlich and published by CRC Press. This book was released on 2015-10-15 with total page 643 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in geomicrobiology have progressed at an accelerated pace in recent years. Ehrlich's Geomicrobiology, Sixth Edition surveys various aspects of the field, including the microbial role in elemental cycling and in the formation and degradation of minerals and fossil fuels. Unlike the fifth edition, the sixth includes many expert contributors
Download or read book Mineral and Thermal Groundwater Resources written by M. Albu and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Is it not generally believed that our town is a healthy place . . . a place highly com mended on this score both for the sick andfor the healthy? . . And then these Baths - the so-called 'artery' of the town, or the 'nerve centre' . . . Do you know what they are in reality, these great and splendid and glorious Baths that have cost so much money? . . A most serious danger to health! All that filth up in Melledal, where there's such an awful stench - it's all seeping into the pipes that lead to the pump-room! Henrik Ibsen, An Enemy of the People, 1882 Henrik Ibsen gave the 'truth about mineral water' more than 100 years ago in An Enemy of the People. His examples came not from the decadent bathing spas of Bohemia or Victorian Britain, but from the very edge of polite society, subarctic Norway! His masterpiece illustrates the central role that groundwaters and, in particular, mineral waters have played in the history of humanity: their economic importance for towns, their magnetism for pilgrims searching for cures, the political intrigues, the arguments over purported beneficent or maleficent health effects and, finally, their contami nation by anthropogenic activity, in Ibsen's case by wastes from a tannery. This book addresses the occurrence, properties and uses of mineral and thermal groundwaters. The use of these resources for heating, personal hygiene, curative and recreational purposes is deeply integrated in the history of civilization.
Download or read book Design and Operation of Solid Oxide Fuel Cells written by Mahdi Sharifzadeh and published by Academic Press. This book was released on 2019-10-31 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design and Operation of Solid Oxide Fuel Cells: The Systems Engineering Vision for Industrial Application presents a comprehensive, critical and accessible review of the latest research in the field of solid oxide fuel cells (SOFCs). As well as discussing the theoretical aspects of the field, the book explores a diverse range of power applications, such as hybrid power plants, polygeneration, distributed electricity generation, energy storage and waste management—all with a focus on modeling and computational skills. Dr. Sharifzadeh presents the associated risks and limitations throughout the discussion, providing a very complete and thorough analysis of SOFCs and their control and operation in power plants. The first of its kind, this book will be of particular interest to energy engineers, industry experts and academic researchers in the energy, power and transportation industries, as well as those working and researching in the chemical, environmental and material sectors. - Closes the gap between various power engineering disciples by considering a diverse variety of applications and sectors - Presents and reviews a variety of modeling techniques and considers regulations throughout - Includes CFD modeling examples and process simulation and optimization programming guidance
Download or read book Modern Styrenic Polymers written by John Scheirs and published by John Wiley & Sons. This book was released on 2003-03-28 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title addresses the latest developments in the field, covering the major advances that have occurred over the past five years in the polymerization and structure of new generation polystyrenes that are broadening its scope of application. It covers the advent of branched polystyrenes, syndiotactic polystyrene, high-molecular weight general purpose PS, styrenic interpolymers, and clear SBS copolymers Presents voluminous research previously only reported at conferences in one reference Unique coverage of a topic not found in the field
Download or read book The Handbook of Biogas Utilization written by Charles C. Ross and published by . This book was released on 1996 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a single source of information needed to help.0 guide industry in its choice of technologies for cost effective utilization of the biogas from anaerobic treatment systems. It is not designed to provide a how-to approach to biogas utilization design. Rather, it is intended as a technical resource for those interested in biogas applications. Contents: biogas sources and characteristics; biogas properties; conversion; handling and storage; instrumentation and controls; health, safety and environmental considerations; and system economics. Vendor listings.
Download or read book Encyclopedia of American Business History written by Charles R. Geisst and published by Infobase Publishing. This book was released on 2014-05-14 with total page 581 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents an alphabetically-arranged reference to the history of business and industry in the United States. Includes selected primary source documents.
Download or read book Applied Mineralogy in the Mining Industry written by W. Petruk and published by Elsevier. This book was released on 2000-11-29 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Techniques of performing applied mineralogy investigations, and applications and capabilities of recently developed instruments for measuring mineral properties are explored in this book intended for practicing applied mineralogists, students in mineralogy and metallurgy, and mineral processing engineers. The benefits of applied mineralogy are presented by using in-depth applied mineralogy studies on base metal ores, gold ores, porphyry copper ores, iron ores and industrial minerals as examples. The chapter on base metal ores includes a discussion on the effects of liberation, particle sizes and surfaces coatings of Pb, Cu, Fe, Ca and So4- on the recoveries of sphalerite, galena and chalcopyrite. The chapter on gold discusses various methods of determining the quantities of gold in different minerals, including 'invisible' gold in pyrite and arsenopyrite, so that a balance of the distribution of gold among the minerals can be calculated. This book also discusses the roles of pyrite, oxygen, moisture and bacterial (thiobacillus ferrooxidans) on reactions that produce acidic drainage from tailings piles, and summarizes currently used and proposed methods of remediation of acidic drainage.
Download or read book Nanotube Superfiber Materials written by Mark Schulz and published by William Andrew. This book was released on 2013-09-16 with total page 861 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanotube Superfiber Materials refers to different forms of macroscale materials with unique properties constructed from carbon nanotubes. These materials include nanotube arrays, ribbons, scrolls, yarn, braid, and sheets. Nanotube materials are in the early stage of development and this is the first dedicated book on the subject. Transitioning from molecules to materials is a breakthrough that will positively impact almost all industries and areas of society. Key properties of superfiber materials are high flexibility and fatigue resistance, high energy absorption, high strength, good electrical conductivity, high maximum current density, reduced skin and proximity effects, high thermal conductivity, lightweight, good field emission, piezoresistive, magnetoresistive, thermoelectric, and other properties. These properties will open up the door to dozens of applications including replacing copper wire for power conduction, EMI shielding, coax cable, carbon biofiber, bullet-proof vests, impact resistant glass, wearable antennas, biomedical microdevices, biosensors, self-sensing composites, supercapacitors, superinductors, hybrid superconductor, reinforced elastomers, nerve scaffolding, energy storage, and many others. The scope of the book covers three main areas: Part I: Processing; Part II: Properties; and Part III: Applications. Processing involves nanotube synthesis and macro scale material formation methods. Properties covers the mechanical, electrical, chemical and other properties of nanotubes and macroscale materials. Different approaches to growing high quality long nanotubes and spinning the nanotubes into yarn are explained in detail. The best ideas are collected from all around the world including commercial approaches. Applications of nanotube superfiber cover a huge field and provides a broad survey of uses. The book gives a broad overview starting from bioelectronics to carbon industrial machines. - First book to explore the production and applications of macro-scale materials made from nano-scale particles - Sets out the processes for producing macro-scale materials from carbon nanotubes, and describes the unique properties of these materials - Potential applications for CNT fiber/yarn include replacing copper wire for power conduction, EMI shielding, coax cable, carbon biofiber, bullet-proof vests, impact resistant glass, wearable antennas, biomedical microdevices, biosensors, self-sensing composites, supercapacitors, superinductors, hybrid superconductor, reinforced elastomers, nerve scaffolding, energy storage, and many others
Download or read book Immobilized Catalysts written by Andreas Kirschning and published by Springer Science & Business Media. This book was released on 2004-11-22 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: R. Haag, S. Roller: Polymeric Supports for the Immobilisation of Catalysts .- J. Horn, F. Michalek, C.C. Tzschucke, W. Bannwarth: Non-Covalently Solid-Phase Bound Catalysts for Organic Synthesis .- Y. Uozumi: Recent Progress in Polymeric Palladium Catalysts for Organic Synthesis .- D.E. Bergbreiter, J. Li: Applications of Catalysts on Soluble Supports .- B. Desai, C.O. Kappe: Microwave-Assisted Synthesis Involving Immobilized Catalysts .- A. Kirschning, G. Jas: Applications of Immobilized Catalysts in Continuous Flow Processes .- N. End, K.-U. Schöning: Immobilized Catalysts in Industrial Research and Application .- N. End, K.-U. Schöning: Immobilized Biocatalysts in Industrial Research and Production
Download or read book Principles of Soil Microbiology written by Selman Abraham Waksman and published by . This book was released on 1927 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Traces of Bygone Biospheres written by Andreĭ Vitalʹevich Lapo and published by . This book was released on 1982 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geomicrobiology written by Henry Lutz Ehrlich and published by CRC Press. This book was released on 2008-12-22 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: Uncovers the Key Role Microbes Play in the Transformation of Oxidizable and Reducible MineralsMany areas of geomicrobial processes are receiving serious attention from microbiologists, specifically the role microbes play in the formation and degradation of minerals and fossil fuels and elemental cycling. Most notably, the latest research finds that
Download or read book Earth s Earliest Biosphere written by J. William Schopf and published by . This book was released on 1983 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Description for this book, Earth's Earliest Biosphere: Its Origin and Evolution, will be forthcoming.
Download or read book Astrobiology Future Perspectives written by P. Ehrenfreund and published by Springer Science & Business Media. This book was released on 2006-03-05 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: Astrobiology, a new exciting interdisciplinary research field, seeks to unravel the origin and evolution of life wherever it might exist in the Universe. The current view of the origin of life on Earth is that it is strongly connected to the origin and evolution of our planet and, indeed, of the Universe as a whole. We are fortunate to be living in an era where centuries of speculation about the two ancient and fundamental problems: the origin of life and its prevalence in the Universe are being replaced by experimental science. The subject of Astrobiology can be approached from many different perspectives. This book is focused on abiogenic organic matter from the viewpoint of astronomy and planetary science and considers its potential relevance to the origins of life on Earth and elsewhere. Guided by the review papers in this book, the concluding chapter aims to identify key questions to motivate future research and stimulate astrobiological applications of current and future research facilities and space missions. Today’s rich array of new spacecraft, telescopes and dedicated scientists promises a steady flow of discoveries and insights that will ultimately lead us to the answers we seek.
