Автор: Harry Marsh, Francisco Rodriguez-Reinoso
Издательство: Elsevier Science & Technology Books
Год издания: 2006
isbn: 0080444636
Количество страниц: 542
Язык: english
Формат: PDF
With its immense capacity for adsorption from gas and liquid phases, activated carbon is a unique material. It occupies a special place in terms of producing a clean environment involving water purification as well as separations and purification in the chemical and associated industries. In these roles, it exhibits a remarkable efficiency as the international production is a littie more than half a million tonnes per year, with perhaps 2 million tonnes being in continuous use. This is equivalent to the allocation of 200 mg per person of the world population to be compared with the world use of fossil fuels of 2 tonnes per person of the world population. Much is already written about activated carbon such that the Google search engine will offer over one million pages from the Internet. These pages are mosdy descriptive and uncoordinated. Currendy, there exists a need for a text which establishes a framework into which factual information can be located and explained. Further, carbon science has expanded rapidly in recent years with considerable relevance to an understanding of activated carbon. Again, these information are mostly uncoordinated and need to be assimilated into a comprehensive story. This assimilation is the purpose of this book.
Автор: Верещагин А.Н.
Издательство: Наука
Год издания: 1982
Количество страниц: 308
Язык: русский
Формат: DJVU
В табличном виде представлены экспериментально определённые величины мольных констант Керра, оптических и молекулярных анизотропий неорганических и органических соединений, необходимые для вычисления параметров молекулярных эллипсоидов поляризуемости, для исследований электронной и пространственной структуры молекул, межмолекулярных взаимодействий и комплексообразования. Указаны температура, агрегатное состояние или растворитель. Для специалистов в области молекулярной физики и физики жидкостей, физической и структурной химии, теоретической органической химии, молекулярной оптики.
Автор: Aravamudan S.Gopalan, Chien M.Wai, Hollie K.Jacobs
Издательство: An American Chemical Society Publication
Год издания: 2003
isbn: 0841238367
Количество страниц: 496
Язык: english
Формат: PDF
Supercritical fluid carbon dioxide (SF-C02) with its moderate critical constants, nonflammable nature and low cost provides an attractive alternative for replacing organic solvents traditionally used in chemical manufacturing processes. Minimizing liquid waste generation, easy separation of solutes and fast reaction rates are some of the advantages of the supercritical fluid extraction (SFE) technology over conventional solvent extraction methods. The solvation strength of supercritical C02 can be tuned by changing the density of the fluid phase, thus selective extraction and dissolution of compounds may be achieved in SFE processes. Because C02 is not regulated by the US EPA as a volatile organic compound, C02-based SFE processes are environmentally acceptable. The CO2 used in SFE is produced by other industrial processes (e.g. fermentation processes), therefore the gas vented into the atmosphere from the SFE processes does not contribute to the "green house" effect.
Автор: Keshra Sangwal
Издательство: Wiley
Год издания: 2007
isbn: 0470061537
Количество страниц: 468
Язык: english
Формат: PDF
Impurities play an important role in different spheres of our day-to-day life. For example, trace amounts of impurities present in crystalline solids have a profound influence on their mechanical, electrical, thermal and optical properties. Consequently, the performance of different types of devices based on these solids depends on the nature and concentration of impurities present in them. Trace amounts of impurities present in a growth medium also have a strong influence on the processes of nucleation of crystallizing phases of the same substance and the subsequent growth of the nucleated phase. Typical examples of such processes are: beneficial mineralization such as the formation of bone and tooth, and pathological mineralization such as formation of human kidney stones, scale formation in domestic appliances and industrial plants, and crystallization of saturated fatty acid methyl ester components of biodiesel during cold seasons, clogging fuel lines and filters of engines.
Автор: Z.Sekkat, W.Knoll
Издательство: Academic Press
Год издания: 2002
isbn: 0126354901
Количество страниц: 582
Язык: english
Формат: PDF
Research on optically sensitive chromophores containing polymeric films (photoreactive organic thin films, POTF) has exploded during the past decade, and it is continuing to be a very active area of science. Several important phenomena have been discovered, especially at the contact of photochemistry (photoisomerization) and nonlinear optics by the photoisomerization of nonlinear optical molecules in polymers. The material published in the book covers photoreactivity in organic films from the most elementary to the most sophisticated backgrounds, and discusses possible technological uses in views of applications for fast electro-optic modulation, optical data storage, and holography. This book is a comprehensive volume that encompasses the known knowledge on ЗЩЕА research and appllications.
Автор: K.C.Patil, M.S.Hegde, Tanu Rattan, S.T.Aruna
Издательство: World Scientific
Год издания: 2008
isbn: 9812793143
Количество страниц: 362
Язык: english
Формат: PDF
Nanoscience and technology has emerged as a frontier area of research today. A great deal of stimulating progress is being made in the world of nanoscience every other day. Research in “Nanochemistry,” chemistry of nanomaterials, has resulted in the developments of newer methods of synthesis of materials with desired structure, composition, and properties of nanomaterials and their related applications.With this rich array of knowledge available, the question arises as to how does a student, a researcher, or materials scientist get an actual feel of nanopowders and get down to the science and art of making them? Chemistry deals with the synthesis and analysis both being complementary are equally important. Prof KC Patil with his training in Inorganic Synthesis and Propellant Chemistry has found a novel and simple method of tailormaking oxide materials. Prof Patil’s method is distinctly different from the other known methods. I am particularly impressed by the simplicity of the process and the choice of the reactants to prepare a variety of oxide materials from alumina to zirconia and their composites.
Автор: W.L.Luyben
Издательство: McGraw-Hill
Год издания: 1996
isbn: 0070391599
Количество страниц: 749
Язык: english
Формат: PDF
The first edition of this book appeared over fifteen years ago. It was the first chemical engineering textbook to combine modeling, simulation, and control. It also was the first chemical engineering book to present sampled-data control. This choice of subjects proved to be popular with both students and teachers and of considerable practical utility. During the ten-year period following publication, I resisted suggestions from the publisher to produce a second edition because I felt there were really very few useful new developments in the field. The control hardware had changed drastically, but the basic concepts and strategies of process control had undergone little change. Most of the new books that have appeared during the last fifteen years are very similar in their scope and content to the first edition. Basic classical control is still the major subject.
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