Capture Of Heavy Hydrogen Isotopes In A Metal Organic Framework With Active Cui Sites

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Capture of Heavy Hydrogen Isotopes in a Metal-organic Framework with Active Cu(I) Sites

Author :
Publisher :
ISBN 13 :
Total Pages : 13 pages
Book Rating : 4.:/5 (986 download)

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Book Synopsis Capture of Heavy Hydrogen Isotopes in a Metal-organic Framework with Active Cu(I) Sites by :

Download or read book Capture of Heavy Hydrogen Isotopes in a Metal-organic Framework with Active Cu(I) Sites written by and published by . This book was released on 2017 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: The production of pure deuterium and the removal of tritium from nuclear waste are the key challenges in separation of light isotopes. Presently, the technological methods are extremely energy- and cost-intensive. Here we report the capture of heavy hydrogen isotopes from hydrogen gas by selective adsorption at Cu(I) sites in a metal-organic framework. At the strongly binding Cu(I) sites (32 kJ mol-1) nuclear quantum effects result in higher adsorption enthalpies of heavier isotopes. The capture mechanism takes place most efficiently at temperatures above 80 K, when an isotope exchange allows the preferential adsorption of heavy isotopologues from the gas phase. Large difference in adsorption enthalpy of 2.5 kJ mol-1 between D2 and H2 results in D2-over-H2 selectivity of 11 at 100 K, to the best of our knowledge the largest value known to date. Combination of thermal desorption spectroscopy, Raman measurements, inelastic neutron scattering and first principles calculations for H2/D2 mixtures allows the prediction of selectivities for tritium-containing isotopologues.

Helium and Hydrogen Isotope Adsorption and Separation in Metal-Organic Frameworks

Author : Ingrid Zaiser
Publisher : Cuvillier Verlag
ISBN 13 : 3736983778
Total Pages : 200 pages
Book Rating : 4.7/5 (369 download)

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Book Synopsis Helium and Hydrogen Isotope Adsorption and Separation in Metal-Organic Frameworks by : Ingrid Zaiser

Download or read book Helium and Hydrogen Isotope Adsorption and Separation in Metal-Organic Frameworks written by Ingrid Zaiser and published by Cuvillier Verlag. This book was released on 2016-10-31 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: The separation of isotopes has always been a challenge because of their identical size, shape and thermodynamic properties. Nowadays, the extraction of deuterium is performed e.g. by the Girdler Sulfid process or cryogenic distillation, which lead to low separation factors (below 2.5) in combination with high energy costs. The standard way to produce helium-3 is to skim it as a byproduct of the radioactive tritium decay. In this thesis, two alternative approaches have been investigated for the separation of light isotopes, Quantum Sieving and Chemical Affinity Sieving . While Quantum Sieving is based on confinement in small pores, Chemical Affinity Sieving relies on strong adsorption sites. Both methods use the mass difference of the isotopes, which is related to their zero-point energy. The microporous metal-organic frameworks are excellent candidates for studying these quantum effects due to their well-defined pore structure and the possibility to introduce strong adsorption sites directly into the framework. The samples have been exposed to an isotope mixture and the adsorbed quantity of each isotope was detected by low-temperature thermal desorption spectroscopy (TDS). The ratio of the desorbed amount of the isotopes leads directly to the selectivity (separation factor). The selectivity is determined as a function of exposure time and temperature and exhibits the highest value of 25 observed for hydrogen isotopes at temperatures well above the boiling point of liquid nitrogen.

Gas Adsorption in Metal-Organic Frameworks

Author : T. Grant Glover
Publisher : CRC Press
ISBN 13 : 0429891776
Total Pages : 530 pages
Book Rating : 4.4/5 (298 download)

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Book Synopsis Gas Adsorption in Metal-Organic Frameworks by : T. Grant Glover

Download or read book Gas Adsorption in Metal-Organic Frameworks written by T. Grant Glover and published by CRC Press. This book was released on 2018-09-03 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text discusses the synthesis, characterization, and application of metal-organic frameworks (MOFs) for the purpose of adsorbing gases. It provides details on the fundamentals of thermodynamics, mass transfer, and diffusion that are commonly required when evaluating MOF materials for gas separation and storage applications and includes a discussion of molecular simulation tools needed to examine gas adsorption in MOFs. Additionally, the work presents techniques that can be used to characterize MOFs after gas adsorption has occurred and provides guidance on the water stability of these materials. Lastly, applications of MOFs are considered with a discussion of how to measure the gas storage capacity of MOFs, a discussion of how to screen MOFs to for filtration applications, and a discussion of the use of MOFs to perform industrial separations, such as olefin/paraffin separations. Throughout the work, fundamental information, such as a discussion on the calculation of MOF surface area and description of adsorption phenomena in packed-beds, is balanced with a discussion of the results from research literature.

The Chemistry of Metal-Organic Frameworks

Author : Stefan Kaskel
Publisher : John Wiley & Sons
ISBN 13 : 3527693084
Total Pages : 904 pages
Book Rating : 4.5/5 (276 download)

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Book Synopsis The Chemistry of Metal-Organic Frameworks by : Stefan Kaskel

Download or read book The Chemistry of Metal-Organic Frameworks written by Stefan Kaskel and published by John Wiley & Sons. This book was released on 2016-06-14 with total page 904 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing vital knowledge on the design and synthesis of specific metal-organic framework (MOF) classes as well as their properties, this ready reference summarizes the state of the art in chemistry. Divided into four parts, the first begins with a basic introduction to typical cluster units or coordination geometries and provides examples of recent and advanced MOF structures and applications typical for the respective class. Part II covers recent progress in linker chemistries, while special MOF classes and morphology design are described in Part III. The fourth part deals with advanced characterization techniques, such as NMR, in situ studies, and modelling. A final unique feature is the inclusion of data sheets of commercially available MOFs in the appendix, enabling experts and newcomers to the field to select the appropriate MOF for a desired application. A must-have reference for chemists, materials scientists, and engineers in academia and industry working in the field of catalysis, gas and water purification, energy storage, separation, and sensors.

Hydrogen Storage Materials

Author : R. G. Barnes
Publisher :
ISBN 13 :
Total Pages : 336 pages
Book Rating : 4.:/5 (51 download)

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Book Synopsis Hydrogen Storage Materials by : R. G. Barnes

Download or read book Hydrogen Storage Materials written by R. G. Barnes and published by . This book was released on 1988 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ames Laboratory, Iowa, USA

Metal-Organic Framework Materials

Author : Leonard R. MacGillivray
Publisher : John Wiley & Sons
ISBN 13 : 1118931580
Total Pages : 1210 pages
Book Rating : 4.1/5 (189 download)

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Book Synopsis Metal-Organic Framework Materials by : Leonard R. MacGillivray

Download or read book Metal-Organic Framework Materials written by Leonard R. MacGillivray and published by John Wiley & Sons. This book was released on 2014-09-19 with total page 1210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal-Organic Frameworks (MOFs) are crystalline compounds consisting of rigid organic molecules held together and organized by metal ions or clusters. Special interests in these materials arise from the fact that many are highly porous and can be used for storage of small molecules, for example H2 or CO2. Consequently, the materials are ideal candidates for a wide range of applications including gas storage, separation technologies and catalysis. Potential applications include the storage of hydrogen for fuel-cell cars, and the removal and storage of carbon dioxide in sustainable technical processes. MOFs offer the inorganic chemist and materials scientist a wide range of new synthetic possibilities and open the doors to new and exciting basic research. Metal-Organic Frameworks Materials provides a solid basis for the understanding of MOFs and insights into new inorganic materials structures and properties. The volume also reflects progress that has been made in recent years, presenting a wide range of new applications including state-of-the art developments in the promising technology for alternative fuels. The comprehensive volume investigates structures, symmetry, supramolecular chemistry, surface engineering, recognition, properties, and reactions. The content from this book will be added online to the Encyclopedia of Inorganic and Bioinorganic Chemistry: http://www.wileyonlinelibrary.com/ref/eibc

Introduction to Machine Learning

Author : Ethem Alpaydin
Publisher : MIT Press
ISBN 13 : 0262028182
Total Pages : 639 pages
Book Rating : 4.2/5 (62 download)

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Book Synopsis Introduction to Machine Learning by : Ethem Alpaydin

Download or read book Introduction to Machine Learning written by Ethem Alpaydin and published by MIT Press. This book was released on 2014-08-22 with total page 639 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction -- Supervised learning -- Bayesian decision theory -- Parametric methods -- Multivariate methods -- Dimensionality reduction -- Clustering -- Nonparametric methods -- Decision trees -- Linear discrimination -- Multilayer perceptrons -- Local models -- Kernel machines -- Graphical models -- Brief contents -- Hidden markov models -- Bayesian estimation -- Combining multiple learners -- Reinforcement learning -- Design and analysis of machine learning experiments.

Organic Polymers

Author : Arpit Sand
Publisher : BoD – Books on Demand
ISBN 13 : 1789845734
Total Pages : 148 pages
Book Rating : 4.7/5 (898 download)

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Book Synopsis Organic Polymers by : Arpit Sand

Download or read book Organic Polymers written by Arpit Sand and published by BoD – Books on Demand. This book was released on 2020-03-11 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, Organic Polymers, covers aspects that are of immediate concern to a new entrant to the field of polymers. Taken as a whole, these eight chapters aim to help the readers easily assimilate other specialized and exhaustive treatises on the subject. Topics dealing with the chemistry and technology of polymers are presented in a careful and logical manner so as to provide an easy and enjoyable read. Several examples and analogies are included so to make the main concepts easy to follow and tables and figures are included so that the book can serve, to a limited extent, as a hand book dealing with polysaccharides with different parameters. This book is meant for students studying polysaccharides and those working on graft copolymers and other allied polymer industries but without a formal educational background in organic polymers.

Adsorbents

Author : Ralph T. Yang
Publisher : John Wiley & Sons
ISBN 13 : 0471462411
Total Pages : 424 pages
Book Rating : 4.4/5 (714 download)

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Book Synopsis Adsorbents by : Ralph T. Yang

Download or read book Adsorbents written by Ralph T. Yang and published by John Wiley & Sons. This book was released on 2003-08-01 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adsorption promises to play an integral role in several future energy and environmental technologies, including hydrogen storage, CO removal for fuel cell technology, desulfurization of transportation fuels, and technologies for meeting higher standards on air and water pollutants. Ralph Yang's Adsorbents provides a single and comprehensive source of knowledge for all commercial and new sorbent materials, presenting the fundamental principles for their syntheses, their adsorption properties, and their present and potential applications for separation and purification. Chapter topics in this authoritative, forward-looking volume include: - Formulas for calculating the basic forces or potentials for adsorption - Calculation of pore-size distribution from a single adsorption isotherm - Rules for sorbent selection - Fundamental principles for syntheses/preparation, adsorption properties, and applications of commercially available sorbents - Mesoporous molecular sieves and zeolites - ̧-complexation sorbents and their applications - Carbon nanotubes, pillared clays, and polymeric resins Yang covers the explosion in the development of new nanoporous materials thoroughly, as the adsorption properties of some of these materials have remained largely unexplored. The whole of this book benefits from the new adsorbent designs made possible by the increase in desktop computing and molecular simulation, making Adsorbents useful to both practicing laboratories and graduate programs. Ralph Yang's comprehensive study contributes significantly to the resolution of separation and purification problems by adsorption technologies.

Biomolecular EPR Spectroscopy

Author : Wilfred Raymond Hagen
Publisher : CRC Press
ISBN 13 : 1420059580
Total Pages : 264 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Biomolecular EPR Spectroscopy by : Wilfred Raymond Hagen

Download or read book Biomolecular EPR Spectroscopy written by Wilfred Raymond Hagen and published by CRC Press. This book was released on 2008-12-22 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive, Up-to-Date Coverage of Spectroscopy Theory and its Applications to Biological SystemsAlthough a multitude of books have been published about spectroscopy, most of them only occasionally refer to biological systems and the specific problems of biomolecular EPR (bioEPR). Biomolecular EPR Spectroscopy provides a practical introduction t

Green Technologies for the Environment

Author : Sherine O. Obare
Publisher : ACS Symposium
ISBN 13 : 9780841230187
Total Pages : 0 pages
Book Rating : 4.2/5 (31 download)

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Book Synopsis Green Technologies for the Environment by : Sherine O. Obare

Download or read book Green Technologies for the Environment written by Sherine O. Obare and published by ACS Symposium. This book was released on 2016-06-08 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book "Green Technologies for the Environment" brings together experts in the field of biotechnology, chemistry, chemical engineering, environmental engineering and toxicology from both academia and industry, to discuss green processes for the environment. The topics included finding replacements for crude oil to meet both our energy needs as well as the supply of chemicals for the production of essential products, advances in chemical processing, waste valorization, alternative solvents, and developments in homogeneous and heterogeneous catalysis as well as enzyme-based processes for chemical transformations. Advances in green chemistry concepts will further enhance the field through the design of new chemicals and solvents. In addition, obtaining a better understanding of the mechanistic pathways involved in various reactions is essential toward advances in the field. The goal of the work described in each of the chapters is to address the need for best practices for chemical processes and for the production of chemicals, while promoting sustainability.

Handbook of X-Ray Data

Author : Günter H. Zschornack
Publisher : Springer Science & Business Media
ISBN 13 : 3540286187
Total Pages : 969 pages
Book Rating : 4.5/5 (42 download)

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Book Synopsis Handbook of X-Ray Data by : Günter H. Zschornack

Download or read book Handbook of X-Ray Data written by Günter H. Zschornack and published by Springer Science & Business Media. This book was released on 2007-01-24 with total page 969 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the only handbook available on X-ray data. In a concise and informative manner, the most important data connected with the emission of characteristic X-ray lines are tabulated for all elements up to Z = 95 (Americium). The tabulated data are characterized and, in most cases, evaluated. Furthermore, all important processes and phenomena connected with the production, emission and detection of characteristic X-rays are discussed.

Recent Advances in Technology Research and Education

Author : Dumitru Luca
Publisher : Springer
ISBN 13 : 3319674595
Total Pages : 352 pages
Book Rating : 4.3/5 (196 download)

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Book Synopsis Recent Advances in Technology Research and Education by : Dumitru Luca

Download or read book Recent Advances in Technology Research and Education written by Dumitru Luca and published by Springer. This book was released on 2017-09-08 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents selected contributions to the 16th International Conference on Global Research and Education Inter-Academia 2017 hosted by Alexandru Ioan Cuza University of Iași, Romania from 25 to 28 September 2017. It is the third volume in the series, following the editions from 2015 and 2016. Fundamental and applied research in natural sciences have led to crucial developments in the ongoing 4th global industrial revolution, in the course of which information technology has become deeply embedded in industrial management, research and innovation – and just as deeply in education and everyday life. Materials science and nanotechnology, plasma and solid state physics, photonics, electrical and electronic engineering, robotics and metrology, signal processing, e-learning, intelligent and soft computing have long since been central research priorities for the Inter-Academia Community (I-AC) – a body comprising 14 universities and research institutes from Japan and Central/East-European countries that agreed, in 2002, to coordinate their research and education programs so as to better address today’s challenges. The book is intended for use in academic, government, and industrial R&D departments as a reference tool in research and technology education. The 42 peer-reviewed papers were written by more than 119 leading scientists from 14 countries, most of them affiliated to the I-AC.

Gas Separation by Adsorption Processes

Author : Ralph T. Yang
Publisher : Butterworth-Heinemann
ISBN 13 : 1483162664
Total Pages : 363 pages
Book Rating : 4.4/5 (831 download)

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Book Synopsis Gas Separation by Adsorption Processes by : Ralph T. Yang

Download or read book Gas Separation by Adsorption Processes written by Ralph T. Yang and published by Butterworth-Heinemann. This book was released on 2013-10-22 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gas Separation by Adsorption Processes provides a thorough discussion of the advancement in gas adsorption process. The book is comprised of eight chapters that emphasize the fundamentals concept and principles. The text first covers the adsorbents and adsorption isotherms, and then proceeds to detailing the equilibrium adsorption of gas mixtures. Next, the book covers rate processes in adsorbers and adsorber dynamics. The next chapter discusses cyclic gas separation processes, and the remaining two chapters cover pressure-swing adsorption. The book will be of great use to students, researchers, and practitioners of disciplines that involve gas separation processes, such as chemical engineering.

Deuteride Materials

Author : Jiping Liu
Publisher : Springer
ISBN 13 : 9811369623
Total Pages : 289 pages
Book Rating : 4.8/5 (113 download)

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Book Synopsis Deuteride Materials by : Jiping Liu

Download or read book Deuteride Materials written by Jiping Liu and published by Springer. This book was released on 2019-02-27 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the very first book that offers an up-to-date and comprehensive overview on deuteride. It not only includes the concept, existing forms, key characteristics, but also reviews the preparation and characterization technologies and the latest research developments of deuteride. The special properties such as the nuclear properties, isotropic and neutron effect, poisonousness, radioactivity, volume expansion are systematically discussed to build up the sound understanding of the materials. In particular, this work reviews a number of commercial and scientific uses of the materials including nuclear reactors, NMR spectroscopy and medicines. Researchers and industrial professionals in medicine, chemistry, biochemistry, environmental sciences and defense sciences will benefit from this work.

Metal Organic Frameworks

Author : Victoria Samanidou
Publisher : MDPI
ISBN 13 : 303928486X
Total Pages : 198 pages
Book Rating : 4.0/5 (392 download)

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Book Synopsis Metal Organic Frameworks by : Victoria Samanidou

Download or read book Metal Organic Frameworks written by Victoria Samanidou and published by MDPI. This book was released on 2020-03-27 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal–organic frameworks are among the most promising novel materials. The concept of MOFs was first introduced in 1990. They were actually initially used in catalysis, gas separation, membranes, electrochemical sensors. Later on, they were introduced as SPE sorbents for PAHs (Polycyclic Aromatic Hydrocarbons) in environmental water samples, then the range expanded to the field of analytical chemistry, both in chromatographic separation and sample preparation, with great success in, e.g., SPE and SPME (Solid Phase Mico-extraction). Since then, the number of analytical applications implementing MOFs as sorbents in sorptive sample preparation approaches is increasing. Τhis is reinforced by the fact that, at least theoretically, an infinite number of structures can be designed and synthesized, thus making tuneability one of the most unique characteristics of MOF materials. Moreover, they have been designed in various shapes, such as columns, fibers, and films, so that they can meet more analytical challenges with improved analytical features.Their exceptional properties attracted the interest of analytical chemists who have taken advantage of the unique structures and properties and have already introduced them in several sample pretreatment techniques, such as solid phase extraction, dispersive SPE, magnetic solid phase extraction, solid phase microextraction, stir bar sorptive extraction, etc.

Soil pollution: a hidden reality

Author : Food and Agriculture Organization of the United Nations
Publisher : Food & Agriculture Org.
ISBN 13 : 9251305056
Total Pages : 156 pages
Book Rating : 4.2/5 (513 download)

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Book Synopsis Soil pollution: a hidden reality by : Food and Agriculture Organization of the United Nations

Download or read book Soil pollution: a hidden reality written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2018-04-30 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document presents key messages and the state-of-the-art of soil pollution, its implications on food safety and human health. It aims to set the basis for further discussion during the forthcoming Global Symposium on Soil Pollution (GSOP18), to be held at FAO HQ from May 2nd to 4th 2018. The publication has been reviewed by the Intergovernmental Technical Panel on Soil (ITPS) and contributing authors. It addresses scientific evidences on soil pollution and highlights the need to assess the extent of soil pollution globally in order to achieve food safety and sustainable development. This is linked to FAO’s strategic objectives, especially SO1, SO2, SO4 and SO5 because of the crucial role of soils to ensure effective nutrient cycling to produce nutritious and safe food, reduce atmospheric CO2 and N2O concentrations and thus mitigate climate change, develop sustainable soil management practices that enhance agricultural resilience to extreme climate events by reducing soil degradation processes. This document will be a reference material for those interested in learning more about sources and effects of soil pollution.