Tag: Metal

Theoretical Aspects of Transition Metal Catalysis (2024)


Free Download Gernot Frenking, "Theoretical Aspects of Transition Metal Catalysis"
English | 2005 | pages: 255 | ISBN: 3540235108, 3642062512 | PDF | 4,5 mb
Transition metal catalysis belongs to the most important chemical research areas because a ubiquitous number of chemical reactions are catalyzed by transition metal compounds. Many efforts are being made by industry and academia to find new and more efficient catalysts for chemical processes. Transition metals play a prominent role in catalytic research because they have been proven to show an enormous diversity in lowering the activation barrier for chemical reactions. For many years, the search for new catalysts was carried out by trial and error, which was costly and time consuming. The understanding of the mechanism of the catalytic process is often not very advanced because it is difficult to study the elementary steps of the catalysis with experimental techniques. The development of modern quantum chemical methods for calculating possible intermediates and transition states was a breakthrough in gaining an understanding of the reaction pathways of transition metal catalyzed reactions. This volume, organized into eight chapters written by leading scientists in the field, illustrates the progress made during the last decade. The reader will obtain a deep insight into the present state of quantum chemical research in transition metal catalysis.

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Molecular Mechanisms of Metal Toxicity and Carcinogenesis


Free Download Molecular Mechanisms of Metal Toxicity and Carcinogenesis by Xianglin Shi, Vince Castranova, Val Vallyathan
English | 2001 | ISBN: 0792374983 | 249 Pages | PDF | 7.6 MB
These proceedings focus on the latest research in molecular mechanisms of metal-induced toxicity and carcinogenesis. The conference promoted a multidisciplinary investigative approach and included presentations from international experts on state-of-the-art information in this field.

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Metal-Oxygen Clusters The Surface and Catalytic Properties of Heteropoly Oxometalates


Free Download John B. Moffat, "Metal-Oxygen Clusters: The Surface and Catalytic Properties of Heteropoly Oxometalates"
English | 2001 | pages: 317 | ISBN: 1475774796, 0306465078 | PDF | 3,0 mb
Metal-Oxygen Clusters is the first book, providing an overview of the surface chemistry and catalytic properties of heteropoly oxometalates. After a brief look at the early knowledge of heteropoly oxometalates, the book discusses the synthesis, characterization, structure, bulk properties and stability of these materials. The remainder and the largest portion of the book explores the properties of these solids as catalysts in acid-catalyzed and oxidation processes in supported or unsupported forms.

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Electrochemical Activation of Catalysis Promotion, Electrochemical Promotion, and Metal-Support Interactions (2024)


Free Download Costas G. Vayenas, Symeon Bebelis, Costas Pliangos, "Electrochemical Activation of Catalysis: Promotion, Electrochemical Promotion, and Metal-Support Interactions"
English | 2001 | pages: 596 | ISBN: 1475782349, 0306467194 | PDF | 58,4 mb
I knew nothing of the work of C. G. Vayenas on NEMCA until the early nineties. Then I learned from a paper of his idea (gas interface reactions could be catalyzed electrochemically), which seemed quite marvelous; but I did not understand how it worked. Consequently, I decided to correspond with Professor Vayenas in Patras, Greece, to reach a better understanding of this concept. I think that my early papers (1946, 1947, and 1957), on the relationship between the work function of metal surfaces and electron transfer reactions thereat to particles in solution, held me in good stead to be receptive to what Vayenas told me. As the electrode potential changes, so of course, does the work function at the interface, and gas metal reactions there involve adsorbed particles which have bonding to the surface. Whether electron transfer is complete in such a case, or whether the effect is on the desorption of radicals, the work function determines the strength of their bonding, and if one varies the work function by varying the electrode potential, one can vary the reaction rate at the interface. I got the idea. After that, it has been smooth sailing. Dr. Vayenas wrote a seminal article in Modern Aspects of Electrochemistry, Number 29, and brought the field into the public eye. It has since grown and its usefulness in chemical catalytic reactions has been demonstrated and verified worldwide.

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Cold Micro Metal Forming (2024)


Free Download Cold Micro Metal Forming: Research Report of the Collaborative Research Center "Micro Cold Forming" (SFB 747), Bremen, Germany by Frank Vollertsen
English | EPUB | 2020 | 370 Pages | ISBN : 3030112799 | 95.87 MB
This book contains the research report of the Collaborative Research Center "Micro Cold Forming" (SFB 747) of the University of Bremen, Germany. The topical research focus lies on new methods and processes for a mastered mass production of micro parts which are smaller than 1mm (by forming in batch size higher than one million). The target audience primarily comprises research experts and practitioners in production engineering, but the book may also be of interest to graduate students alike.

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Analysis and Optimization of Sheet Metal Forming Processes


Free Download Analysis and Optimization of Sheet Metal Forming Processes
English | 2024 | ISBN: 1032579412 | 371 Pages | PDF (True) | 17 MB
Beginning with an introduction to sheet metal forming, the book provides a guide to the various techniques used within the industry. It provides a discussion of sheet metal properties relevant to forming processes, such as ductility, formability, and strength, and analyses how materials should be selected with factors including material properties, cost, and availability. Forming processes including shearing, bending, deep drawing, and stamping are also discussed, along with tools such as dies, punches, and moulds. Simulation and modelling are key to optimising the sheet metal forming process, including finite element analysis and computer-aided engineering. Other topics included are quality control, design, industry applications, and future trends.

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Rare Metal Technology 2024


Free Download Rare Metal Technology 2024
English | 2024 | ISBN: 3031502353 | 473 Pages | PDF EPUB (True) | 119 MB
This collection presents papers from a symposium on extraction of rare metals from primary and secondary materials and residues as well as rare extraction processing techniques used in metal production. The collection covers the extraction of less common or minor metals including elements such as antimony, bismuth, barium, beryllium, boron, calcium, chromium, gallium, germanium, hafnium, indium, manganese, molybdenum, platinum group metals, rare earth metals, rhenium, scandium, selenium, sodium, strontium, tantalum, tellurium, and tungsten. It also includes rare metals of low-tonnage sales compared to high-tonnage metals (iron, copper, nickel, lead, tin, zinc, or light metals such as aluminum, magnesium, or titanium and electronic metalloid silicon). Rare metal processing covers bio-metallurgy, hydro-metallurgy, and electro-metallurgy while novel high-temperature processes such as microwave heating, solar-thermal reaction synthesis, and cold crucible synthesis of rare metals are also addressed. Also included in this collection is the design of extraction equipment used in these processes from suppliers as well as laboratory and pilot plant studies.

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