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Synthesis And Characterization Of Cu Mcm 41 And Ni Mcm 41 Type Catalytic Materials
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Book Synopsis SYNTHESIS AND CHARACTERIZATION OF Cu-MCM-41 AND Ni-MCM-41 TYPE CATALYTIC MATERIALS. by :
Download or read book SYNTHESIS AND CHARACTERIZATION OF Cu-MCM-41 AND Ni-MCM-41 TYPE CATALYTIC MATERIALS. written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Discovery of mesoporous materials by Mobil researchers in 1992 opened a new field in catalytic applications. The materials designated as M41S family are MCM-41 with one-dimensional hexagonal structure, MCM-48 with three-dimensional cubic structure and MCM-51 with unstable lamellar structure. This family of materials have high surface areas up to 1500 m2/g, narrow pore size distributions with pore sizes varying from 20 to 100 Å. These materials can be activated by incorporation of metals or active compounds into their structures. In this study, copper and nickel incorporated MCM-41 type catalytic materials were synthesized via different methods namely, impregnation, high temperature and low temperature direct synthesis methods. The Cu-MCM-41, and Ni-MCM-41, as well as synthesized MCM-41 were characterized by using XRD, TEM, N2 sorption, SEM, XRF, EDS, AAS and TPR. MCM-41 was synthesized with high temperature direct synthesis method. High surface area values up to 1400 m2/g of MCM-41 mesoporous materials were obtained with high pore volumes up to 1.17 cc/g. Cu-MCM-41 type catalytic materials were synthesized with three different methods. Impregnation and high temperature direct synthesis methods gave better results than those of low temperature direct synthesis method. In impregnation, relatively high surface area values (730 m2/g) were obtained with Cu/Si mole ratio as high as 0.3 in the product. For the case of high temperature direct synthesis products, Cu/Si mole ratios as high as 0.26 were obtained with somewhat smaller surface areas (400 m2/g). Low temperature direct synthesis method is the least favorable method in metal loading. Ni-MCM-41 type of catalytic materials were synthesized by impregnation and high temperature direct syntheses methods. Ni incorporation by high temperature direct synthesis method gave high surface area values (560-930 m2/g) having Ni/Si mole ratios of 0.12-0.28.
Book Synopsis Synthesis and Characterization of Mobil Composition of Material No. 41 Mesoporous Silica Supported Palladium-nickel Bimetallic Catalysts by : Md. Atikur Rahman
Download or read book Synthesis and Characterization of Mobil Composition of Material No. 41 Mesoporous Silica Supported Palladium-nickel Bimetallic Catalysts written by Md. Atikur Rahman and published by . This book was released on 2010 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthesizes noble metals palladium (Pd)-nickel (Ni) nanocatalysts with varying Pd and Ni content using mobil composition of material no. 41 (MCM-41) for hydrogen production from steam reforming of methanol. Carries out the in situ synthesis of silica encapsulated Pd/Ni nanoparticles hydrothermally using template-directed synthesis. Confirms the physico-chemical characteristics of the synthesized MCM-41 support by x-ray diffraction, N2 adsorption, and transmission electron microscopy (TEM) analyses.
Book Synopsis Synthesis and Characterization of Tungsten-centaining MCM-41 Catalysts for Metathesis of Olefins by : Aticha Chaisuwan
Download or read book Synthesis and Characterization of Tungsten-centaining MCM-41 Catalysts for Metathesis of Olefins written by Aticha Chaisuwan and published by . This book was released on 2003 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Al-MCM-41 and Bifunctional Pt/Al-MCM-41 Heterogeneous Catalysts by : Ping Zhan
Download or read book Synthesis and Characterization of Al-MCM-41 and Bifunctional Pt/Al-MCM-41 Heterogeneous Catalysts written by Ping Zhan and published by . This book was released on 1998 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of a Novel MCM-41 Supported Palladium(II)-imine Catalysts for Heck Reaction by : Suhaila Borhamdin
Download or read book Synthesis and Characterization of a Novel MCM-41 Supported Palladium(II)-imine Catalysts for Heck Reaction written by Suhaila Borhamdin and published by . This book was released on 2008 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nanoporous Materials II by : T.J. Pinnavaia
Download or read book Nanoporous Materials II written by T.J. Pinnavaia and published by Elsevier. This book was released on 2000-04-14 with total page 915 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first symposium on Access in Nanoporous Materials was held in Lansing, Michigan on June 7-9, 1995. The five years that have passed since that initial meeting have brought remarkable advances in all aspects of this growing family of materials. In particular, impressive progress has been achieved in the area of novel self-assembled mesoporous materials, their synthesis, characterization and applications. The supramolecular self-assembly of various inorganic and organic species into ordered mesostructures became a powerful method for synthesis of mesoporous molecular sieves of tailored framework composition, pore structure, pore size and desired surface functionality for advanced applications in such areas as separation, adsorption, catalysis, environmental cleanup and nanotechnology. In addition to mesostructured metal oxide molecular sieves prepared through supramolecular assembly pathways, clays, carbon molecular sieves, porous polymers, sol-gel and imprinted materials, as well as self-assembled organic and other zeolite-like materials, have captured the attention of materials researchers around the globe. The contents of the current volume present a sampling of more than 150 oral and poster papers delivered at the Symposium on Access in Nanoporous Materials II held in Banff, Alberta on May 25-30, 2000. About 70% of the papers are devoted to the synthesis of siliceous mesoporous molecular sieves, their modification, characterization and applications, which represent the current research trend in nanoporous materials. The remaining contributions provide some indications on the future developments in the area of non-siliceous molecular sieves and related materials. This book reflects the current trends and advances in this area, which will certainly attract the attention of materials chemists in the 21st century.
Download or read book Redox written by Rozina Khattak and published by BoD – Books on Demand. This book was released on 2020-07-08 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book "Redox" provides vast insight into the oxidation-reduction reactions to its readers. The book consists of three sections that include redox in the coordination compounds, organic compounds and polymerization; redox in electrochemistry; and redox and fish welfare. The first section consists of three chapters that describe the role of redox reactions in several fields such as transition metal chemistry, degradation processes of toxic compounds and dyes in treatment of water and wastewater, the catalysis of oxidation of organic compounds by metal active sites, and synthesis of copolymers. The second section consists of two chapters. The role of redox reactions and reactivity description of compounds are discussed in the second section of the book. The non-aqueous redox flow batteries are described in this section. The third section extensively discusses the redox balance and fish welfare and consists of one chapter.
Book Synopsis On the Preparation and Characterisation of MCM-41 Supported Heterogeneous Nickel and Molybdenum Catalysts by : Dennis Lensveld
Download or read book On the Preparation and Characterisation of MCM-41 Supported Heterogeneous Nickel and Molybdenum Catalysts written by Dennis Lensveld and published by . This book was released on 2003 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis Characterization and Catalytic Testing of Chiral Schiff Base Metal Complexes Catalysts Immobilized in MCM-41 by : Rozie Sarip
Download or read book Synthesis Characterization and Catalytic Testing of Chiral Schiff Base Metal Complexes Catalysts Immobilized in MCM-41 written by Rozie Sarip and published by . This book was released on 2007 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Perovskites and Related Mixed Oxides by : Pascal Granger
Download or read book Perovskites and Related Mixed Oxides written by Pascal Granger and published by John Wiley & Sons. This book was released on 2016-02-23 with total page 1050 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive handbook and ready reference details all the main achievements in the field of perovskite-based and related mixed-oxide materials. The authors discuss, in an unbiased manner, the potentials as well as the challenges related to their use, thus offering new perspectives for research and development on both an academic and industrial level. The first volume begins by summarizing the different synthesis routes from molten salts at high temperatures to colloidal crystal template methods, before going on to focus on the physical properties of the resulting materials and their related applications in the fields of electronics, energy harvesting, and storage as well as electromechanics and superconductivity. The second volume is dedicated to the catalytic applications of perovskites and related mixed oxides, including, but not limited to total oxidation of hydrocarbons, dry reforming of methane and denitrogenation. The concluding section deals with the development of chemical reactors and novel perovskite-based applications, such as fuel cells and high-performance ceramic membranes. Throughout, the contributions clearly point out the intimate links between structure, properties and applications of these materials, making this an invaluable tool for materials scientists and for catalytic and physical chemists.
Book Synopsis Mesoporous Zeolites by : Javier García-Martínez
Download or read book Mesoporous Zeolites written by Javier García-Martínez and published by John Wiley & Sons. This book was released on 2015-05-26 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: Authored by a top-level team of both academic and industrial researchers in the field, this is an up-to-date review of mesoporous zeolites. The leading experts cover novel preparation methods that allow for a purpose-oriented fine-tuning of zeolite properties, as well as the related materials, discussing the specific characterization methods and the applications in close relation to each individual preparation approach. The result is a self-contained treatment of the different classes of mesoporous zeolites. With its academic insights and practical relevance this is a comprehensive handbook for researchers in the field and related areas, as well as for developers from the chemical industry.
Book Synopsis Chemistry of Zeolites and Related Porous Materials by : Ruren Xu
Download or read book Chemistry of Zeolites and Related Porous Materials written by Ruren Xu and published by John Wiley & Sons. This book was released on 2009-05-29 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: Widely used in adsorption, catalysis and ion exchange, the family of molecular sieves such as zeolites has been greatly extended and many advances have recently been achieved in the field of molecular sieves synthesis and related porous materials. Chemistry of Zeolites and Related Porous Materials focuses on the synthetic and structural chemistry of the major types of molecular sieves. It offers a systematic introduction to and an in-depth discussion of microporous, mesoporous, and macroporous materials and also includes metal-organic frameworks. Provides focused coverage of the key aspects of molecular sieves Features two frontier subjects: molecular engineering and host-guest advanced materials Comprehensively covers both theory and application with particular emphasis on industrial uses This book is essential reading for researches in the chemical and materials industries and research institutions. The book is also indispensable for researches and engineers in R&D (for catalysis) divisions of companies in petroleum refining and the petrochemical and fine chemical industries.
Download or read book Nanocasting written by An-Hui Lu and published by Royal Society of Chemistry. This book was released on 2010 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanostructured materials with tailored properties are regarded as a fundamental element in the development of future science and technology. Research is still ongoing into the nanosized construction elements required to create functional solids. The recently developed technique, nanocasting, has great advantage over others in terms of the synthesis of special nanostructured materials by the careful choice of suitable elements and nanoengineering steps. This new book summarizes the recent developments in nanocasting, including the principles of nanocasting, syntheses of novel nanostructured materials, characterization methods, detailed synthetic recipes and further possible development in this area. The book focuses on the synthesis of porous solids from the viewpoint of methodology and introduces the science of nanocasting from fundamental principles to their use in synthesis of various materials. It starts by outlining the principles of nanocasting, requirements to the templates and precursors and the tools needed to probe matter at the nanoscale level. It describes how to synthesize nano structured porous solids with defined characteristics and finally discusses the functionalization and application of porous solids. Special attention is given to new developments in this field and future perspectives. A useful appendix covering the detailed synthetic recipes of various templates including porous silica, porous carbon and colloidal spheres is included which will be invaluable to researchers wanting to follow and reproduce nanocast materials. Topics covered in the book include: * inorganic chemistry * organic chemistry * solution chemistry * sol-gel and interface science * acid-base equilibria * electrochemistry * biochemistry * confined synthesis The book gives readers not only an overview of nanocasting technology, but also sufficient information and knowledge for those wanting to prepare various nanostructured materials without needing to search the available literature.
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selective Catalysis Utilizing Bifunctionalized MCM-41 Mesoporous Materials by : Kasey Jean Strosahl
Download or read book Selective Catalysis Utilizing Bifunctionalized MCM-41 Mesoporous Materials written by Kasey Jean Strosahl and published by . This book was released on 2005 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: The unique properties of bifunctionalized MCM-41 prove it to be a valuable tool in the catalytic field. The primary functional group (i.e. acid/base, metal center) enables the reaction to proceed as the typical homogeneous reaction would; however, the secondary group places restrictions upon the catalytic reaction. The secondary group acts as a gatekeeper, only allowing the appropriate reactants to diffuse into the material's mesopores. In this work, hydrophobic pentafluorophenyl groups are co-condensed as secondary groups onto the inner surface of the pores. These secondary groups increase the hydrophobicity of the mesopores. By utilizing an aqueous solvent, then, one can control which reactants diffuse into the pores to interact with the catalyst. Herein, a Sharpless-type reaction between an organic azide and a terminal acetylene is effectively catalyzed using a copper/pentafluorophenyl MCM-41 material. The reaction's success depends upon the solvent employed-water versus benzene; therefore, the reaction is an example of how one can manipulate a catalytic reaction's yield by varying the reactant/solvent properties. Another reaction scheme is described where a molecule containing both hydrophobic and hydrophilic tails can be forced into a certain conformation by the hydrophobic MCM -41 in an aqueous solution to produce a syn elimination to a cis olefin. This method allows one to control the regiochemistry of the catalytic reaction. Numerous other types of reactions, including stereospecific reactions, could also be catalyzed using this same idea if modified to correspond with the appropriate characteristics.
Book Synopsis New Developments in Catalysis Research by : Lawrence P. Bevy
Download or read book New Developments in Catalysis Research written by Lawrence P. Bevy and published by Nova Publishers. This book was released on 2005 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemical or biological process whereby the presence of an external compound, a catalyst, serves as an agent to cause a chemical reaction to occur or to improve reaction performance without altering the external compound. Catalysis is a very important process from an industrial point of view since the production of most industrially important chemicals involve catalysis. Research into catalysis is a major field in applied science, and involves many fields of chemistry and physics. The new book brings together leading research in this vibrant field.
Book Synopsis Selective Catalysis Utilizing Bifunctionalized MCM-41 Mesoporous Materials by :
Download or read book Selective Catalysis Utilizing Bifunctionalized MCM-41 Mesoporous Materials written by and published by . This book was released on 2005 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selective catalysis is a field that has been under intense investigation for the last 100 years. The most widely used method involves catalysts with stereochemical selectivity. In this type of catalysis, the catalyst controls which reactants will be transformed into the desired product. The secret to employing this type of catalysis, though, is to design the proper catalyst, which can be difficult. One may spend as much time developing the catalyst as spent separating the various products achieved. Another method of selective catalysis is now being explored. The method involves utilizing a multifunctional mesoporous silica catalyst with a gate-keeping capability. Properly functionalized mesoporous materials with well-defined pore morphology and surface properties can provide an ideal three-dimensional environment for anchoring various homogeneous catalysts. These materials can circumvent the multi-sited two-dimensional nature most heterogeneous systems have without adversely impacting the reactant diffusivity. These single-site nanostructured catalysts with ordered geometrical structure are advantageous in achieving high selectivity and reactivity. Mesoporous materials can be prepared to include pores lined homogeneously with tethered catalysts via co-condensation. Additionally, these materials can be reacted with another (RO)3SiZ̃ group by using the traditional grafting method; this group is anchored predominantly at the entrances to the pores rather than inside the pores. Thus, if these Z̃ groups are chosen properly, they can select certain molecules to enter the pores and be converted to products (Scheme 1). In such multifunctional catalysts, the selectivity depends on the discrimination of the gatekeeper. Gate-keeping MCM-41 materials are at the forefront of catalytic substances.
