Xem 1-20 trên 3471 kết quả Chemicals
  • Chemical Kinetics The area of chemistry that concerns reaction rates. .Reaction Rate Change in concentration (conc) of a reactant or product per unit time. conc of A at time t2 − conc of A at time t1 Rate = t2 − t1 ∆A =

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  • Perry’s has been an important source for chemical engineering information since 1934. The significant contributions of the editors who have guided preparation of the previous editions is acknowledged. These include John H. Perry (first to third editions), Robert H. Perry (fourth to sixth editions), Cecil H. Chilton (fourth and fifth editions), and Sidney D. Kirkpatrick (fourth edition). Ray Genereaux (DuPont) contributed to each of the first six editions, and Shelby Miller (Argonne National Lab) worked on the second through the seventh.

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  • Before any water or wastewater can be treated, it must first be characterized. Thus, characterization needs to be addressed. Waters and wastewaters may be characterized according to their quantities and according to their constituent physical, chemical, and microbiological characteristics. Therefore, Part I is composed of two chapters: “Quantity of Water and Wastewater,” and “Constituents of Water and Wastewater.”

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  • Tham khảo sách 'perry's chemical engineers handbook - 2', kỹ thuật - công nghệ, hoá học - dầu khí phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Risk assessment of chemical substances is an ever-developing discipline. Transparent and accurate risk assessments are necessary for decision-makers to make wise risk management decisions. The outcome of risk assessments may have enormous economical consequences, in addition to the consequences for human health and the environment. Globalization is a fact, with huge possibilities for economic and social prosperity. Food and consumer products are produced in one part of the world and put on the market in another....

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  • This book is intended as a guide to the selection or design of the principal kinds of chemical process equipment by engineers in school and industry. The level of treatment assumes an elementary knowledge of unit operations and transport phenomena. Access to the many design and reference books listed in Chapter 1 is desirable. For coherence, brief reviews of pertinent theory are provided. Emphasis is placed on shortcuts, rules of thumb, and data for design by analogy, often as primary design processes but also for quick evaluations of detailed work....

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  • This handbook is an encyclopedic treatment of chemical elements and their most important compounds intended for professionals and students in many areas of chemistry throughout the manufacturing, academic, and consulting communities.

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  • The fourth edition of Elements of Chemical Reaction Engineering is a completely revised version of the worldwide best-selling book. It combines authoritative coverage of the principles of chemical reaction engineering with an unsurpassed focus on critical thinking and creative problem solving, employing open-ended questions and stressing the Socratic method. Clear and superbly organized, it integrates text, visuals, and computer simulations to help readers solve even the most challenging problems through reasoning, rather than by memorizing equations.

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  • Ecotoxicological models have been applied increasingly to perform chemical risk assessments since the first models of this kind emerged about 25 years ago. The first ecotoxicological models were applied to very specific cases — for instance, cadmium contamination of Lake Erie or mercury contamination of Mex Bay, Alexandria. The models were inspired by the experience gained in ecological modeling and therefore contained good descriptions of ecological processes. Slightly later, the so-called fate models emerged, which were first developed by McKay and others.

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  • Estimating the transport and fate of chemicals released into the environment is an interesting and challenging task. The global environment is large on the chemical transport and fate scale. This text applies the mathematics of diffusion, turbulent diffusion, and dispersion to the atmosphere, lakes, rivers, groundwater, and oceans, as well as transport between these media. The book follows a new educational paradigm of textbooks, in that it is based on examples and case studies.

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  • Chemicals are part of our everyday lives. The hundreds of chemicals that are manufactured by industrial processes influence what we do and how we do it. This book offers descriptions and process details of the most popular of those chemicals. The manufacture of chemicals involves many facets of chemistry and engineering which are exhaustively treated in a whole series of encyclopedic works, but it is not always simple to rapidly grasp present status of knowledge from these sources.

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  • Comprehensive manual embracing essentially all the classical and modern areas of chemical kinetics. Provides details of modern applications in chemistry, technology and biochemistry. Special sections of the book treat subjects not covered sufficiently in other manuals, including: modern methods of experimental determination of rate constants of reactions including laser pico- and femtochemistry, magnetochemistry, and ESR; and descriptions of advanced theories of elementary chemical processes.

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  • Primary chemically formed lead dioxide (PbO2 ) was used as positive electrode in preparation of lead–acid bipolar batteries. Chemical oxidation was carried out by both mixing and dipping methods using an optimized amount of ammonium persulfate as a suitable oxidizing agent. Xray diffraction studies showed that the weight ratio of -PbO2 to -PbO2 is more for mixing method before electrochemical forming.

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  • This book is intended as a guide to the selection or design of the principal kinds of chemical process equipment by engineers in school and industry. The level of treatment assumes an elementary knowledge of unit operations and transport phenomena.

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  • The Project Gutenberg EBook of An Introductory Course of Quantitative Chemical Analysis, by Henry P. Talbot This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www.gutenberg.net Title: An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Author: Henry P. Talbot Release Date: June 30, 2004

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  • Chemical reaction engineering (reaction engineering or reactor engineering) is a specialty in chemical engineering or industrial chemistry dealing with chemical reactors. Frequently the term relates specifically to catalytic reaction systems where either a homogeneous or heterogeneous catalyst is present in the reactor.

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  • Background and Basic Ideas explains the fundamentals of using a system approach as a more advanced approach to teaching chemical engineering. It also discusses very briefly how this approach allows compacting the contents of many chemical engineering subjects and relates them with one another in a systematic and easy-to-learn manner.

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  • There are many contents in this book: physical properties of pure substances, vapor pressures of pure substances, vapor pressures of solutions, physical and chemical data, water-vapor content of gases, densities of pure substances, densities of aqueous inorganic solutions at 1 atm, densities of aqueous organic solutions, densities of miscellaneous materials, physical and chemical data, specific heats of miscellaneous materials, properties of formation and, combustion reactions.

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  • The chemical sensor plays an essential role in the fields of environmental conservation and monitoring, disaster and disease prevention, and industrial analysis. A typical chemical sensor is a device that transforms chemical information in a selective and reversible way, ranging from the concentration of a specific sample component to total composition analysis, into an analytically useful signal.

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  • The Workshop on Energy and Transportation took place on January 7-9, 2002, in Washington, DC. This workshop was the second in a series of workshops that comprise the study Challenges in the Chemical Sciences in the 21st Century. The purpose of this study was to carry out a survey of the current status of the chemical sciences, including chemistry and chemical engineering, and its interfaces with other disciplines such as mechanical engineering, physics, materials science, and the biological sciences.

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