Fernando Ramôa Ribeiro – författare

Intensive research on zeolites, during the past thirty years, has resulted in a deep understanding of their chemistry and in a true zeolite science, including synthesis, structure, chemical and physical properties, and catalysis. These studies are the basis for the development and growth of several industrial processes applying zeolites for selective sorption, separation, and catalysis. In 1983, a NATO Advanced Study Institute was organized in Alcabideche (portugal) to establish the State-of-the-Art in Zeolite Science and Technology and to contribute to a better understanding of the structural properties of zeolites, the configurational constraints they may exert, and their effects in adsorption, diffusion, and catalysis. Since then, zeolite science has witnessed an almost exponential growth in published papers and patents, dealing with both fundamentals issues and original applications. The proposal of new procedures for zeolite synthesis, the development of novel and sophisticated physical techniques for zeolite characterization, the discovery of new zeolitic and related microporous materials, progresses in quantum chemistry and molecular modeling of zeolites, and the application of zeolites as catalysts for organic reactions have prompted increasing interest among the scientific community. An important and harmonious interaction between various domains of Physics, Chemistry, and Engineering resulted therefrom.

Light alkanes tend to be resistant to many forms of activation. The horizontal approach of this text covers homogeneous, heterogeneous and biological catalysis, designed to allow readers to gain an awareness of progress and ideas in research areas different from their own. The book contains both general chapters, giving an overview of the subject, and specialized contributions that deal with the details and state of the art. A specialist report is also included which gives a critical insight into current progress and discusses future prospects and major challenges.

Catalysts are central in modern industrial chemistry and there is an urgent need to develop new catalysts. Such a rapid pace of development brings with it a new set of challenges at all levels of research, from synthesis and characterization to testing and modelling. This book reviews the current status of combinatorial catalysis, scientific catalyst design techniques, methods for preparing inorganic combinatorial libraries, experimental design methods, data processing, system modelling an simulation, and catalyst testing. The individual contributions reveal the development of high throughput catalyst design and test methods and identify the main challenges in the field, including new catalyst preparation techniques, rapid performance evaluation, and new microreactor configurations.

Catalysts are central in modern industrial chemistry and there is an urgent need to develop new catalysts. Such a rapid pace of development brings with it a new set of challenges at all levels of research, from synthesis and characterization to testing and modelling. This book reviews the current status of combinatorial catalysis, scientific catalyst design techniques, methods for preparing inorganic combinatorial libraries, experimental design methods, data processing, system modelling an simulation, and catalyst testing. The individual contributions reveal the development of high throughput catalyst design and test methods and identify the main challenges in the field, including new catalyst preparation techniques, rapid performance evaluation, and new microreactor configurations.

The pace of development in the chemical industry is increasing steadily, bring with it a corresponding need to develop catalysts as rapidly as possible. High throughput experimentation has had great success in drug design but hitherto it has scarcely been used in the catalysis field. There is thus a need to make the underlying principles of this methodology more widely understood, in a coherent, integrated format. This book aims to fulfill such a need - it delineates and consolidates the principles and methods underlying accelerated catalyst design and testing, identifies the main challenges for progress in the field and contains an extensive review of catalytic principles.

The pace of development in the chemical industry is increasing steadily, bring with it a corresponding need to develop catalysts as rapidly as possible. High throughput experimentation has had great success in drug design but hitherto it has scarcely been used in the catalysis field. There is thus a need to make the underlying principles of this methodology more widely understood, in a coherent, integrated format. This book aims to fulfill such a need - it delineates and consolidates the principles and methods underlying accelerated catalyst design and testing, identifies the main challenges for progress in the field and contains an extensive review of catalytic principles.

Energy and feedstock materials for the chemical industry are in increasing demand and, with constraints related to the availability and use of oil, the energy and chemical industry is undergoing considerable changes. In recent years, major restructuring has occurred in the oil, petrochemical, and chemical industry, with increasing attention devoted to the use of natural gas, methane in particular, as a chemical feedstock rather than just as a fuel. The conversion of remote natural gas into liquid fuels or other transportable chemicals is a challenge to industrial catalysis. Few processes exist so far with the major ones involving the conversion of natural gas to synthesis gas by steam reforming, CO2 reforming, or partial oxidation, followed by the syntheses of methanol, hydrocarbons (Fischer-Tropsch synthesis), or ammonia.In this book, a comprehensive overview of the field of processing natural gas is given, through a series of chapters written by leading scientists and engineers in the field. New developments are discussed and current work relevant to the area is shown by a series of recent works by researchers working in this and related fields.

Energy and feedstock materials for the chemical industry are in increasing demand and, with constraints related to the availability and use of oil, the energy and chemical industry is undergoing considerable changes. In recent years, major restructuring has occurred in the oil, petrochemical, and chemical industry, with increasing attention devoted to the use of natural gas, methane in particular, as a chemical feedstock rather than just as a fuel. The conversion of remote natural gas into liquid fuels or other transportable chemicals is a challenge to industrial catalysis. Few processes exist so far with the major ones involving the conversion of natural gas to synthesis gas by steam reforming, CO2 reforming, or partial oxidation, followed by the syntheses of methanol, hydrocarbons (Fischer-Tropsch synthesis), or ammonia.In this book, a comprehensive overview of the field of processing natural gas is given, through a series of chapters written by leading scientists and engineers in the field. New developments are discussed and current work relevant to the area is shown by a series of recent works by researchers working in this and related fields.

In chemical processes, the progressive deactivation of solid catalysts is a major economic concern and mastering their stability has become as essential as controlling their activity and selectivity. For these reasons, there is a strong motivation to understand the mechanisms leading to any loss in activity and/or selectivity and to find out the efficient preventive measures and regenerative solutions that open the way towards cheaper and cleaner processes. This book covers the fundamental and applied aspects of solid catalyst deactivation in a comprehensive way and encompasses the state of the art in the field of reactions catalyzed by zeolites. This particular choice is justified by the widespread use of molecular sieves in refining, petrochemicals and organic chemicals synthesis processes, by the large variety in the nature of their active sites (acid, base, acid-base, redox, bifunctional) and especially by their peculiar features, in terms of crystallinity, structural order and textural properties, which make them ideal models for heterogeneous catalysis. The aim of this book is to be a critical review in the field of zeolite deactivation and regeneration by collecting contributions from experts in the field which describe the factors, explain the techniques to study the causes and suggest methods to prevent (or limit) catalyst deactivation. At the same time, a selection of commercial processes and exemplar cases provides the reader with theoretical insights and practical hints on the deactivation mechanisms and draws attention to the key role played by the loss of activity on process design and industrial practice.

Light alkanes tend to be resistant to many forms of activation. The horizontal approach of the present book covers homogeneous, heterogeneous and biological catalysis, thus allowing readers to gain an awareness of progress and ideas in research areas different from their own. The book contains both general chapters, giving an overview of the subject, and specialised contributions that deal with the details and state of the art. A specialist report is also included which gives a critical insight into current progress and discusses future prospects and major challenges. Audience: Newcomers and senior researchers in the field of alkane activation. The mixed theoretical and practical approach will be of interest to researchers and industrialists alike.

Zeolites have been the focus of intensive activity and growth in applications over the past 25 years in ion exchange, in adsorp­ tion and in catalytic process technology. Beginning with the syn­ thetic zeolites A,X and Y, continuing into the emerging ZSM series, and including selected natural zeolites, applications span the range from large-scale purification and separation to such major petroleum and petrochemical processes as catalytic cracking and aromatics alkylation. The future promises several new areas of signiciant use as our energy resource base is expanded. As a result, a NATO Advanced Study Institute on Zeolites was held in Alcabideche, Portugal, May 1-12, 1983. Its purpose was to summarize the state-of-the-art in zeolite science and technology, with particular emphasis on recent developments. This summary is intended to complement presentations of the latest research results at the 1983 International Zeolites Association meeting in .Reno, Nevada - USA. Both the fundamentals concepts and industrial applications are addressed in the lectures of the Institute. Individual chapters cover historical development, structure, crystallography and synthesis techniques. Basic principles of adsorption, diffusion, ion exchange and acidity are reviewed. A section on catalysis addresses shape selectivity, transition metals, bifunctional catalysis and "methanol­ to-gasoline". Included in the section on industrial applications are chapters on reactor and adsorber design, catalytic cracking, xylene and n­ -paraffins isomerization, as well as ion exchange and adsorption.