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Design Synthesis And Characterization Of Novel Fine Particle Unsupported Catalysts For Coal Liquefaction Technical Progress Report April 26 1991 July 26 1991
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Book Synopsis Design, Synthesis, and Characterization of Novel Fine-particle, Unsupported Catalysts for Coal Liquefaction. Technical Progress Report, April 26, 1991--July 26, 1991 by :
Download or read book Design, Synthesis, and Characterization of Novel Fine-particle, Unsupported Catalysts for Coal Liquefaction. Technical Progress Report, April 26, 1991--July 26, 1991 written by and published by . This book was released on 1991 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of carbonyl-based homogeneous catalyst precursors has been prepared. These species include: Fe(CO)4PPh3, Fe(CO)3(PPh3)2, Fe(CO)2(PPh3)2CS2, S2Fe2(CO)6, S2Fe3(CO)9. Fe(CO)4PPh3 was prepared by a combined photochemical and thermal route from triphenylphosphine (PPh3) in iron pentacarbonyl (Fe(CO)5). This preparation procedure, which is selective to the monosubstituted product, is outlined herein. Currently these compounds are being tested as catalysts/catalyst precursors with coal or model compounds in the tubing bomb reactors to provide information relating catalytic activity to catalyst structure and properties. (VC).
Book Synopsis Design, Synthesis, and Characterization of Novel Fine-particle, Unsupported Catalysts for Coal Liquefaction. Technical Progress Report, January 27, 1991--April 26, 1991 by :
Download or read book Design, Synthesis, and Characterization of Novel Fine-particle, Unsupported Catalysts for Coal Liquefaction. Technical Progress Report, January 27, 1991--April 26, 1991 written by and published by . This book was released on 1991 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Initial synthesis work has focused on preparation of fine-particle iron-based compounds using an Fe(CO)5 precursor. Fe(CO)5 was chosen because of the liability of the carbonyl ligands with respect to substitution under either moderate thermal or photochemical reaction conditions. Six synthesis attempts have been carried out with Fe(CO)5 using CS2 as the sulfur source; they are outlined here.
Book Synopsis Design, Synthesis, and Characterization of Novel Fine-particle, Unsupported Catalysts for Coal Liquefaction. Technical Progress Report, October 26, 1991--January 25, 1992 by :
Download or read book Design, Synthesis, and Characterization of Novel Fine-particle, Unsupported Catalysts for Coal Liquefaction. Technical Progress Report, October 26, 1991--January 25, 1992 written by and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this work is to investigate the kinetics-assisted design, synthesis and characterization of fine-particle, unsupported catalysts for coal liquefaction. The goal is to develop a fundamental understanding of coal catalysis and catalysts that will, in turn, allow for the specification of a novel optical catalyst for coal liquefaction.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1993 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design, Synthesis, and Characterization of Novel Fine-particle, Unsupported Catalysts for Coal Liquefaction. Technical Progress Report, October 26, 1990--January 26, 1991 by :
Download or read book Design, Synthesis, and Characterization of Novel Fine-particle, Unsupported Catalysts for Coal Liquefaction. Technical Progress Report, October 26, 1990--January 26, 1991 written by and published by . This book was released on 1991 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first task in our proposed study of catalysts for coal liquefaction was to prepare ultrafine dispersed metal sulfide particles by reactive precipitation from solutions of appropriate metal precursors. At this point, equipment to allow us to prepare these air-sensitive materials in an anaerobic environment has been acquired and assembled. Initial experiments aimed at synthesizing iron sulfide particles have been initiated. As part of the investigation of short contact time catalytic coal liquefaction, initial efforts focused on the noncatalytic pyrolysis reactions of coal and a model compound, Dibenzyl ether (DBE). Two different reactor configurations were examined; catalytic experiments are planned for the coming month.
Book Synopsis Design, Synthesis, and Characterization of Novel Fine-particle, Unsupported Catalysts for Coal Liquefaction. Technical Progress Report, October 25, 1990--October 24, 1991 by :
Download or read book Design, Synthesis, and Characterization of Novel Fine-particle, Unsupported Catalysts for Coal Liquefaction. Technical Progress Report, October 25, 1990--October 24, 1991 written by and published by . This book was released on 1991 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this work is to investigate the kinetics-assisted design, synthesis and characterization of fme-pardcle, unsupported catalysts for coal liquefaction. The goal is to develop a fundamental understanding of coal catalysis and catalysts that will, in turn, allow for the specification of a novel optimal catalyst for coal liquefaction.
Book Synopsis Design, Synthesis, and Characterization of Novel Fine-particle, Unsupported Catalysts for Coal Liquefaction. Technical Progress Report, January 26, 1992--April 25, 1992 by :
Download or read book Design, Synthesis, and Characterization of Novel Fine-particle, Unsupported Catalysts for Coal Liquefaction. Technical Progress Report, January 26, 1992--April 25, 1992 written by and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation aimed at devising a procedure for preparing alkyl-or aryl-capped iron sulfide particles continues. An initial attempt to prepare fine-particle, aryl-capped iron sulfides (S-31) involved the competitive reaction of thiophenol (PhSH) and sodium sulfide (Na2S) with Fe(II). However, SEM examination of the particles formed by this procedure indicated that no size control had been attained. It was thought that the phenyl group of thiophenol was not bulky enough to prevent thiolate bridging and consequent particle size growth of the metal sulfide. So the bulkier thiol 1-adamantanethiol was synthesized and used in synthesis S-33 in the next attempt to prepare fine-particle, capped iron sulfides.
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1993 with total page 1200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design, Synthesis, and Characterization of Novel Fine-particle, Unsupported Catalysts for Coal Liquefaction by :
Download or read book Design, Synthesis, and Characterization of Novel Fine-particle, Unsupported Catalysts for Coal Liquefaction written by and published by . This book was released on 1991 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this work is to investigate the kinetics-assisted design, synthesis and characterization of fme-pardcle, unsupported catalysts for coal liquefaction. The goal is to develop a fundamental understanding of coal catalysis and catalysts that will, in turn, allow for the specification of a novel optimal catalyst for coal liquefaction.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1993 with total page 1356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fine Particle Clay Catalysts for Coal Liquefaction. Quarterly Technical Progress Report, November 9, 1991-February 8, 1992 by :
Download or read book Fine Particle Clay Catalysts for Coal Liquefaction. Quarterly Technical Progress Report, November 9, 1991-February 8, 1992 written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Novel Nanodispersed Coal Liquefaction Catalysts by :
Download or read book Novel Nanodispersed Coal Liquefaction Catalysts written by and published by . This book was released on 1993 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this project is to pursue the development of highly dispersed and inexpensive catalysts for improved coal solubilization and upgrading of coal liquids. A novel study of the synthesis of liquefaction catalysts of manometer size is being carried out. It is based on the molecular design of inverse micelles (microemulsions). These surfactant-stabilized, metal-bearing microdrops offer unique opportunities for synthesizing very small particles by providing a cage-like effect that limits particle nucleation, growth and agglomeration. The emphasis is on molybdenum- and iron-based catalysts, but the techniques being developed should also be generally applicable. The size of these very small and monodispersed particles will be accurately determined both separately and after in situ and ex situ coal impregnation. The as-prepared nanoparticles as well as the catalyst-impregnated coal matrix are characterized using a battery of techniques, including g dynamic light scattering, x-ray diffraction and transmission electron microscopy. Catalytic activity tests are conducted under standardized coal liquefaction conditions. The effects of particle size of these unsupported catalysts on the product yield and distribution during conversion of a bituminous and a subbituminous coal are being determined. This report discusses molybdenum sulfide particle synthesis, characterization, and microemulsion characterization.
Book Synopsis Liquefaction of Coals Using Ultra-fine Particle, Unsupported Catalysts by :
Download or read book Liquefaction of Coals Using Ultra-fine Particle, Unsupported Catalysts written by and published by . This book was released on 1991 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this program is to design and fabricate an experimental ultra-fine particle generation system; use this system to generate ultra-fine, iron compound, catalyst particles; and to access the ability of these ultra-fine catalyst particles to improve the performance of the solubilization stage of two-stage, catalytic-catalytic liquefaction processes. The effort applied to this program during this reporting period was devoted to experimental design and fabrication tasks.
Book Synopsis Liquefaction of Coals Using Ultra-fine Particle, Unsupported Catalysts by :
Download or read book Liquefaction of Coals Using Ultra-fine Particle, Unsupported Catalysts written by and published by . This book was released on 1991 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: The program objective is to generate ultra-fine catalyst particles (20 to 400 Å in size) and quantify their potential for improving coal dissolution in the solubilization stage of two-stage catalytic-catalytic liquefaction systems. In the first quarterly report for this program the concept behind our approach was detailed, the structure of the program was presented, key technical issues were identified, preliminary designs were outlined, and technical progress was discussed. All progress made during the second quarter of this program related to experiment design of the proposed supercritical expansion technique for generating ultra-fine, iron compound, catalyst particles. This second quarterly report, therefore, presents descriptions of the final designs for most system components; diagnostic approaches and designs for determining particles size and size distributions, and the composition of the pre-expansion supercritical solution; and the overall technique progress made during this reporting period. 6 refs., 15 figs., 1 tab.
Book Synopsis Design, Synthesis, and Characterization of Unsupported Catalysts for Coal Liquefaction by : Stephen M. Casey
Download or read book Design, Synthesis, and Characterization of Unsupported Catalysts for Coal Liquefaction written by Stephen M. Casey and published by . This book was released on 1996 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Novel Nanodispersed Coal Liquefaction Catalysts by :
Download or read book Novel Nanodispersed Coal Liquefaction Catalysts written by and published by . This book was released on 1991 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this project is to pursue the development of highly dispersed and inexpensive catalysts for improved coal solubilization and upgrading of coal liquids. A novel study of the synthesis of liquefaction catalysts of nanometer size will be carried out. It is based on the molecular design of reverse micelles (microemulsions). These surfactant-stabilized, metal-bearing microdrops offer unique opportunities for synthesizing very small particles by providing a cage-like effects that limits particle nucleation, growth and agglomeration. The emphasis will be on iron- and molybdenum-based catalysts, but the techniques to be developed should also be generally applicable.
Book Synopsis Novel Nanodispersed Coal Liquefaction Catalysts by :
Download or read book Novel Nanodispersed Coal Liquefaction Catalysts written by and published by . This book was released on 1992 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this project is to pursue the development of highly dispersed and inexpensive catalysts for improved coal solubilization and upgrading of coal liquids. A novel study of the synthesis of liquefaction catalysts of manometer size will be carried out. It is based on the molecular design of reverse micelles (microemulsions). These surfactant-stabilized, metal-bearing microdrops offer unique opportunities for synthesizing very small particles by providing a cage-like effect that limits particle. nucleation, growth and agglomeration. The emphasis will be on iron- and molybdenum-based catalysts, but the techniques to be developed should also be generally applicable. The size of these very small and monodispersed particles will be accurately determined both separately and after in situ and ex situ coal impregnation. The as-prepared nanoparticles as well as the catalyst-impregnated coal or char matrix will be characterized using the following techniques: dynamic light scattering, x-ray diffraction, x-ray photoelectron spectroscopy, scanning and/or transmission electron microscopy, and selective chemisorption. Catalytic activity tests will be conducted under standardized conditions in both hydrogenation and hydrodesulfurization reactions. The effect of particle size of these unsupported catalysts on the product yield and distribution during liquefaction of a bituminous and a subbituminous coal will thus be quantitatively determined.
