Reduction of Carbon Dioxide in Aqueous Solutions by Ionizing Radiation


Book Description

The question of the conditions under which living matter originated on the surface of the earth is still a subject limited largely to speculation. The speculation has a greater chance of approaching the truth insofar as it includes and is based upon the ever wider variety of established scientific fact. One of the purposes of the herein reported observation was to add another fact to the ever increasing information which might have any bearing upon this most interesting question. It is not our purpose in the present communication to discuss the various proposals or the arguments which have been adduced for and against them. One of the most popular current conceptions is that life originated in an organic milieu on the surface of the earth, (1,2,3,4,5). The problem to which we are addressed is the origin of that organic milieu in the absence of any life. It appeared to us that one source, if not the only source, of reduced carbon compounds in complex arrangements might be the interaction of various high energy radiations with aqueous solutions of inorganic materials, particularly carbon dioxide, and nitrogenous compounds such as ammonia and nitrogen, since it appears that these compounds were the commoner forms in which the essential elements found themselves on the primordial earth. While it has long been known that high energy radiations can cause organic decomposition and oxidation, it seemed useful to us to demonstrate that conditions could be found in which high energy radiations could induce the reduction with water of carbon dioxide and the ultimate creation of polyatomic molecules (other than simple polymerization of monomers) of carbon, oxygen, hydrogen and nitrogen.




Greenhouse Gas Carbon Dioxide Mitigation


Book Description

Any mention of the "greenhouse effect" tends to ignite controversy. While the rising atmospheric concentrations of greenhouse gases-especially carbon dioxide- are certainly among the most pressing issues today, theoretical and perceived consequences have been subject to conjecture and misinformation. That raging debate has obscured an important







Chemical Fixation of Carbon DioxideMethods for Recycling CO2 into Useful Products


Book Description

Chemical Fixation of Carbon Dioxide presents new concepts and results from research into the problems caused by increasing levels of carbon dioxide. The book discusses the limitations of natural plant photosynthesis as a sink for carbon dioxide and emphasizes chemical fixation as an important alternative. A number of significant topics are covered, including new coupling reactions for producing compounds such as carbamates, urethanes, and heterocyclic structures; new catalyst systems, particularly for methanation and methanol synthesis; the use of homogeneous solution photosensitizers and heterogeneous semiconductor photocatalysts to photoreduce carbon dioxide with visible light and sunlight; and electrochemical reduction. This book will be a useful reference for organic chemists working on environmental problems, chemical engineers, environmental chemists, professionals at research facilities, and students.










Radiation Chemistry of Organic Compounds


Book Description

Radiation Effects in Materials, Volume 2: Radiation Chemistry of Organic Compounds provides information pertinent to the fundamental aspects of radiation chemistry of organic compounds. This book reviews the published work on the radiation chemistry of organic compounds. Organized into nine chapters, this volume begins with an overview of the study of the chemical reactions produced by high-energy radiation. This text then explores the two groups of radiation sources, namely, natural and artificial, that have been equally valuable for radiation chemistry. Other chapters consider the radiation chemistry of water and aqueous systems that is important to organic radiation chemistry. This book discusses as well how radiation alters simple organic compounds, and how the response varies with the irradiation conditions and the presence of other substances. The final chapter deals with the economic aspects of the use of radiation sources in industry. This book is a valuable resource for radiation chemists.







Reaction Mechanisms in Carbon Dioxide Conversion


Book Description

This book provides an analysis of the reaction mechanisms relevant to a number of processes in which CO2 is converted into valuable products. Several different processes are considered that convert CO2 either in specialty chemicals or in bulk products or fuels. For each reaction, the mechanism is discussed and the assessed steps besides the dark sites of the reaction pathway are highlighted. From the insertion of CO2 into E-X bonds to the reduction of CO2 to CO or other C1 molecules or else to C2 or Cn molecules, the reactions are analysed in order to highlight the known and obscure reaction steps. Besides well known reaction mechanisms and energy profiles, several lesser known situations are discussed. Advancing knowledge of the latter would help to develop efficient routes for the conversion of CO2 into valuable products useful either in the chemical or in the energy industry. The content of this book is quite different from other books reporting the use of CO2. On account of its clear presentation, “Reaction Mechanisms in Carbon Dioxide Conversion” targets in particular researchers, teachers and PhD students.




The Radiation Chemistry of Water


Book Description

The Radiation Chemistry of Water tackles radiation-induced changes in water and explains the behavior of irradiated water, with some changes in aqueous solutions. This book deals primarily with short-lived species like the hydroxyl radical, hydrated electron, and hydrogen atom, which cause the chemical changes in irradiated water and aqueous solutions. These species and their origin, properties, and dependence of their yields on various factors are discussed in several chapters. Other topics also covered are the diffusion-kinetic model of water radiolysis and some general cases, radiation sources, and dosimetry. This book is most useful to students in the fields of radiation chemistry, physical chemistry, radiobiology, and nuclear technology.