Download or read book Optimization of Catalyst Systems with Emphasis on Precious Metal Usage written by P. Öser and published by . This book was released on 1987 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Catalysis by Precious Metals Past and Future written by Marcela Martinez Tejada and published by MDPI. This book was released on 2020-04-15 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: The future of the precious metals is shiny and resistant. Although expensive and potentially replaceable by transition metal catalysts, precious metal implementation in research and industry shows potential. These metals catalyze oxidation and hydrogenation due to their dissociative behavior toward hydrogen and oxygen, dehydrogenation, isomerization, and aromatization, etc. The precious metal catalysts, especially platinum-based catalysts, are involved in a variety of industrial processes. Examples include Pt–Rh gauze for nitric acid production, the Pt/Al2O3 catalyst for cyclohexane and propylene production, and Pd/Al2O3 catalysts for petrochemical hydropurification reactions, etc. A quick search of the number of published articles in the last five years containing a combination of corresponding “metals” (Pt, Pd, Ru, Rh and Au) and “catalysts” as keywords indicates the importance of the Pt catalysts, but also the continuous increase in the contribution of Pd and Au. This Special Issue reveals the importance of precious metals in catalysis and focuses on mono- and bi-metallic formulations of any supported precious metals and their promotional catalytic effect of other transition metals. The application of precious metals in diverse reactions, either homogeneous or heterogeneous, and studies of the preparation, characterization, and applications of the supported precious metal catalysts, are presented.

Download or read book Automobiles and Pollution written by Paul Degobert and published by Editions OPHRYS. This book was released on with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores the impact automobile emissions have on air pollution, focusing on the share of pollution that can accurately be attributed to the use of vehicles. Presents general information on atmospheric pollution and its regulation in Europe, then discusses its impact on health and the environment, the chemistry and mechanisms of automobile pollution, the influence of fuel properties, post-combustion treatments, and economic challenges to alleviating the problem. Translated and enlarged from Automobile et pollution published by Editions Technip in Paris in 1992. Annotation copyrighted by Book News, Inc., Portland, OR

Download or read book Catalysis by Precious Metals Past and Future written by Marcela Martinez Tejada and published by . This book was released on 2020 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: The future of the precious metals is shiny and resistant. Although expensive and potentially replaceable by transition metal catalysts, precious metal implementation in research and industry shows potential. These metals catalyze oxidation and hydrogenation due to their dissociative behavior toward hydrogen and oxygen, dehydrogenation, isomerization, and aromatization, etc. The precious metal catalysts, especially platinum-based catalysts, are involved in a variety of industrial processes. Examples include Pt-Rh gauze for nitric acid production, the Pt/Al2O3 catalyst for cyclohexane and propylene production, and Pd/Al2O3 catalysts for petrochemical hydropurification reactions, etc. A quick search of the number of published articles in the last five years containing a combination of corresponding “metals” (Pt, Pd, Ru, Rh and Au) and “catalysts” as keywords indicates the importance of the Pt catalysts, but also the continuous increase in the contribution of Pd and Au. This Special Issue reveals the importance of precious metals in catalysis and focuses on mono- and bi-metallic formulations of any supported precious metals and their promotional catalytic effect of other transition metals. The application of precious metals in diverse reactions, either homogeneous or heterogeneous, and studies of the preparation, characterization, and applications of the supported precious metal catalysts, are presented.

Download or read book Annual Index abstracts of SAE Technical Papers written by and published by . This book was released on 2007 with total page 1218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Characterization of Nanoalloys and Non precious Metal Catalysts for Energy and Environmental Applications written by Heather Marie Barkholtz and published by . This book was released on 2016 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two major project areas are reported in this work. First, a new lithium-assisted dissolution-alloying nanoalloy synthesis technique will be introduced. The development of a new nanoalloy synthesis method is desirable to circumvent issues with traditional co-reduction of metal salt methodology. Co-reduction of metal salts can result in unintended core-shell formation due to different metal ion reduction potentials, as well as oxidation of one component resulting in dealloying of the material when it is exposed to air. In order to best address these issues with a new technique, Pd3Ag, PdPt, and PdZn systems were studied because Pd3Ag and PdPt tend to form core-shell structures while PdZn is incredibly difficult to synthesize due to the propensity of Zn to oxidize. The metal nanoalloy systems described in this work (Pd 3Ag, PdPt, and PdZn) were prepared by directly dispersing individual bulk metal alloys (Pd3Ag) or individual bulk metals (Pd, Pt, and Zn) into molten lithium to form an atomic metal dispersion. The lithium melt is then cooled, removed from the glove box, and converted to LiOH, which allows for the metal atoms to self-assemble into nanoalloys. Alloy structure and nanoscale size were confirmed via XRD, TEM, EXAFS, and XANES methods. The catalytic activity of the Pd3Ag system was investigated towards the hydrogenation of acrolein, and the PdPt system was used for methanol electro-oxidation. Both Pd3Ag and PdPt nanoalloy systems gave substantial improvements in their respective catalytic applications over a Pd or Pt standard, respectively. The next project focuses on the rational design and preparation of metal-organic framework (MOF)-derived electrocatalyst materials for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). MOF-derived electrocatalysts are non-platinum group metal (non-PGM) materials and are leading candidates for transportation applications due to their low cost, relatively low operating temperature, capacity to achieve high power density, and direct conversion of chemical to electrical energy acting to improve fuel utilization efficiency. Cathodic ORR is typically sluggish compared to the anodic hydrogen oxidation reaction, requiring more catalyst material to achieve comparable performance. Therefore, research into non-PGM catalysts focuses on the cathodic material design and activation. In this part of the dissertation the focus is to tackle the aggressive milestones set by the U.S. Department of Energy for non-PGM catalysts. First, a series of investigations into the effect of different iron additives and carbon additives on the ORR performance and electrode characteristics was carried out using a one-pot all solid-state synthesis technique to prepare ZIF-8 materials. ZIF-8 is a specific type of MOF which has a Zn2+ metal center bonded to two 2-methylimidazole ligands, forming a three-dimensional matrix with high surface area. After the ZIF-8 was prepared, it was ball milled, pyrolyzed, acid washed, and thermally activated once again in a NH3 environment to yield ORR electrocatalysts consisting of an iron and nitrogen-doped carbon (Fe-N-C) morphology. This one-pot all solid-state synthesis method also allows for investigation into the effect of changing 2-methylimidazole to imidazole on the ORR activity. The effect of this change was determined through catalyst morphology and component characterization and well and electrochemical methods. Finally, ZIF-8 synthesized by wet chemistry was used to prepare the same type of Fe-N-C material as described above. A simple method of tailoring the surface structure and porosity is introduced through careful control of the time spent in NH3 environment. NH3 serves to etch the surface of the material as a function of time spent, which results in widening of pores and removal of surface atoms. Careful control and optimization of NH3 activation conditions allowed for significant improvements in ORR activity in a single fuel cell. Finally, the impact of triple phase boundary penetration on air fed fuel cell data was investigated. Furthermore, it was discovered than when air is used as the oxidant fuel, a break-in period of catalyst improvement exists during the first few polarization curves. It is proposed that scanning to high currents produces water in microporous areas, wetting Nafion ionomer and including those areas in the TPB network.

Download or read book Cumulative Index of The SAE Papers written by Society of Automotive Engineers and published by . This book was released on 1965 with total page 1646 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bioethanol written by Marco Aurelio Pinheiro Lima and published by BoD – Books on Demand. This book was released on 2012-02-01 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent studies have shown strong evidence of human activity impact on the climate of the planet. Higher temperatures and intensification of extreme weather events such as hurricanes are among the consequences. This scenario opens up several possibilities for what is now called "green" or low carbon economy. We are talking about creating new businesses and industries geared to develop products and services with low consumption of natural resources and reduced greenhouse gases emission. Within this category of business, biofuels is a highlight and the central theme of this book. The first section presents some research results for first generation ethanol production from starch and sugar raw materials. Chapters in the second section present results on some efforts around the world to develop an efficient technology for producing second-generation ethanol from different types of lignocellulosic materials. While these production technologies are being developed, different uses for ethanol could also be studied. The chapter in the third section points to the use of hydrogen in fuel cells, where this hydrogen could be produced from ethanol.

Download or read book Sustainable Green Chemical Processes and their Allied Applications written by Inamuddin and published by Springer Nature. This book was released on 2020-05-30 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: Urbanization, industrialization, and unethical agricultural practices have considerably negative effects on the environment, flora, fauna, and the health and safety of humanity. Over the last decade, green chemistry research has focused on discovering and utilizing safer, more environmentally friendly processes to synthesize products like organic compounds, inorganic compounds, medicines, proteins, enzymes, and food supplements. These green processes exist in other interdisciplinary fields of science and technology, like chemistry, physics, biology, and biotechnology, Still the majority of processes in these fields use and generate toxic raw materials, resulting in techniques and byproducts which damage the environment. Green chemistry principles, alternatively, consider preventing waste generation altogether, the atom economy, using less toxic raw materials and solvents, and opting for reducing environmentally damaging byproducts through energy efficiency. Green chemistry is, therefore, the most important field relating to the sustainable development of resources without harmfully impacting the environment. This book provides in-depth research on the use of green chemistry principles for a number of applications.

Download or read book Three way Catalyst Concepts with Optimized Low Precious Metal Loadings written by B. Engler and published by . This book was released on 1990 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comprehensive Chirality written by and published by Newnes. This book was released on 2012-12-31 with total page 5635 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although many books exist on the subject of chiral chemistry, they only briefly cover chiral synthesis and analysis as a minor part of a larger work, to date there are none that pull together the background information and latest advances in one comprehensive reference work. Comprehensive Chirality provides a complete overview of the field, and includes chiral research relevant to synthesis, analytic chemistry, catalysis, and pharmaceuticals. The individual chapters in each of the 9 volumes provide an in depth review and collection of references on definition, technology, applications and a guide/links to the related literature. Whether in an Academic or Corporate setting, these chapters will form an invaluable resource for advanced students/researchers new to an area and those who need further background or answers to a particular problem, particularly in the development of drugs. Chirality research today is a central theme in chemistry and biology and is growing in importance across a number of disciplinary boundaries. These studies do not always share a unique identifying factor or subject themselves to clear and concise definitions. This work unites the different areas of research and allows anyone working or researching in chiral chemistry to navigate through the most essential concepts with ease, saving them time and vastly improving their understanding. The field of chirality counts several journals that are directly and indirectly concerned with the field. There is no reference work that encompasses the entire field and unites the different areas of research through deep foundational reviews. Comprehensive Chirality fills this vacuum, and can be considered the definitive work. It will help users apply context to the diverse journal literature offering and aid them in identifying areas for further research and/or for solving problems. Chief Editors, Hisashi Yamamoto (University of Chicago) and Erick Carreira (ETH Zürich) have assembled an impressive, world-class team of Volume Editors and Contributing Authors. Each chapter has been painstakingly reviewed and checked for consistent high quality. The result is an authoritative overview which ties the literature together and provides the user with a reliable background information and citation resource.

Download or read book Clean Coal Engineering Technology written by Bruce G. Miller and published by Butterworth-Heinemann. This book was released on 2016-09-30 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clean Coal Engineering Technology, Second Edition provides significant information on the major power generation technologies that aim to utilize coal more efficiently, and with less environmental impact. With increased coal combustion comes heightened concerns about coal’s impacts on human health and climate change, so the book addresses the reduction of both carbon footprints and emissions of pollutants, such as particulate matter, nitrogen oxides, and mercury. Part 1 provides an essential grounding in the history of coal use alongside coal chemical and physical characteristics, worldwide distribution, and health and environmental impacts. Part 2 introduces the fundamentals of the major coal utilization technologies and examines the anatomy of a coal-fired power plant before going on to provide an overview of clean coal technologies for advanced power generation. Next, users will find a group of chapters on emissions and carbon management that have been extensively enlarged and updated for the second edition, thus reflecting the ever-increasing importance of this area. The final section of the book focuses on clean coal technology programs around the world and the future role of coal in the energy mix. This fully revised and selectively expanded new edition is a valuable resource for professionals, including environmental, chemical, and mechanical engineers who seek an authoritative and thorough one-volume overview of the latest advances in cleaner power production from coal. Provides a thorough, yet readable, one-volume guide to advanced power generation technologies for cleaner electricity production from coal Retains the essential background information on coal characteristics and the fundamentals of coal-fired power generation Presents extensively expanded and updated coverage on technologies for the reduction of pollutants, including particulate matter, sulfur oxides, and mercury Emphasizes carbon capture methods, storage, and emerging technologies for the reduction of carbon footprints, alongside a discussion of coal’s future in the energy mix

Download or read book NOx Trap Catalysts and Technologies written by Luca Lietti and published by Royal Society of Chemistry. This book was released on 2018-06-13 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will be the first to comprehensively present the current research on catalysts used for NOx abatement in lean exhausts.

Download or read book Pollution Control Technologies Volume III written by Bhaskar Nath and published by EOLSS Publications. This book was released on 2009-09-30 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pollution Control Technologies is a component of Encyclopedia of Environmental and Ecological Sciences, Engineering and Technology Resources in the global Encyclopedia of Life Support Systems (EOLSS), which is an integrated compendium of twenty one Encyclopedias. The Theme on Pollution Control Technologies focuses largely concerned with strategies for pollution reduction, and pollution prevention if at all possible, using scientific and technological methods. Focusing primarily but not exclusively on air pollution, the Theme is written in simple English, avoiding both mathematical and chemical equations as far as possible to facilitate effective and widest possible dissemination. The content of the Theme provides the essential aspects and a myriad of issues of great relevance to our world such as: Control of Particulate Matter in Gaseous Emissions; Control of Gaseous Emissions; Pollution Control through Efficient Combustion Technology; Pollution Control in Industrial Processes; Pollution Control in Transportation, which are then expanded into multiple subtopics, each as a chapter. These three volumes are aimed at the following five major target audiences: University and College students Educators, Professional practitioners, Research personnel and Policy analysts, managers, and decision makers and NGOs

Download or read book Advanced Transmission Electron Microscopy written by Francis Leonard Deepak and published by Springer. This book was released on 2015-06-05 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the current understanding of materials in the context of new and continuously emerging techniques in the field of electron microscopy. The authors present applications of electron microscopic techniques in characterizing various well-known & new nanomaterials. The applications described include both inorganic nanomaterials as well as organic nanomaterials.

Download or read book Renewable Energy for Sustainable Growth Assessment written by Nayan Kumar and published by John Wiley & Sons. This book was released on 2022-04-05 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt: RENEWABLE ENERGY FOR SUSTAINABLE GROWTH ASSESSMENT Written and edited by a team of experts in the field, this collection of papers reflects the most up-to-date and comprehensive current state of renewable energy for sustainable growth assessment and provides practical solutions for engineers and scientists. Renewable energy resources (RERs) are gaining more attention in academia and industry as one of the preferred choices of sustainable energy conversion. Due to global energy demand, environmental impacts, economic needs and social issues, RERs are encouraged and even funded by many governments around the world. Today, researchers are facing numerous challenges as this field emerges and develops, but, at the same time, new opportunities are waiting for RERs utilization in sustainable development all over the globe. Efficient energy conversion of solar, wind, biomass, fuel cells, and other techniques are gaining more popularity and are the future of energy. The present book cross-pollinates recent advances in the study of renewable energy for sustainable growth. Various applications of RERs, modeling and performance analysis, grid integration, soft computing, optimization, artificial intelligence (AI) as well as machine and deep learning aspects of RERs are extensively covered. Whether for the veteran engineer or scientist, the student, or a manager or other technician working in the field, this volume is a must-have for any library. This outstanding new volume Assesses the current and future need for energy on a global scale and reviews the role of renewable energy Includes multiple chapters on biomass and bioenergy Also includes multiple chapters on solar energy and PVs Also includes chapters on fuel cells, wind power, and many other topics Covers the design and implementation of power electronics for energy systems Outlines best practices and the state of the art for renewable energy with regard to sustainability Audience: Engineers, scientists, technicians, managers, students, and faculty working in the field of renewable energy, sustainability and power system

Download or read book Interfacial Applications in Environmental Engineering written by Mark A. Keane and published by CRC Press. This book was released on 2002-11-13 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describing novel methods and catalytic strategies to conserve and maintain air, water, and soil quality, researchers from a range of disciplines discuss the role of interface science in environmental remediation. They detail approaches to separate, reuse, recover, and treat potentially valuable materials using techniques in ion exchange and adsorption; develop and design new catalysts to enhance production, energy, and cost efficiency; and evaluate and improve existing treatment strategies for recycling of plastics and wastes. The 17 studies were developed from presentations at the symposium Application of Interface Science to Environmental Pollution Control (Chicago, August 2001).