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Author : Henry D. Mumper
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (775 download)
Download or read book The Effect of Several Catalysts on the Mild Oxidation of a Bituminous Coal with Air written by Henry D. Mumper and published by . This book was released on 1943 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : A. Ihnatowicz
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (778 download)
Download or read book Tests on the Mild Oxidation of Bituminous Coal written by A. Ihnatowicz and published by . This book was released on 1960 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Andrzej Ihnatowicz
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (778 download)
Download or read book Tests on the Mild Oxidation of Bituminous Coal written by Andrzej Ihnatowicz and published by . This book was released on 1960 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 332 pages
Book Rating : 4.0/5 ( download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-03 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 58 pages
Book Rating : 4.:/5 (685 download)
Download or read book Effects of Low-temperature Catalytic Pretreatments on Coal Structure and Reactivity in Liquefaction. Technical Progress Report, July--September 1993 written by and published by . This book was released on 1994 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this quarter, progress has been made in the following two aspects: (1) spectroscopic and chemical reaction studies on the effects of drying and mild oxidation of a Wyodak subbituminous coal on its structure and pretreatment/liquefaction at 350°C; and (2) effects of dispersed catalyst and solvent on conversion and structural changes of a North Dakota lignite. Drying and oxidation of Wyodak subbituminous coal at 100-150°C have been shown to have significant effects on its structure and on its catalytic and non-catalytic low-severity liquefaction at 350°C for 30 min under 6.9 MPa H2. Spectroscopic analyses using solid-state 13C NMR, Pyrolysis-GC-MS, and FT-IR revealed that oxidative drying at 100-150°C causes the transformation of phenolics and catechol into other related structures (presumably via condensation) and high-severity air drying at 150°C for 20 h leads to disappearance of catechol-like structure. Increasing air drying time or temperature increases oxidation to form more oxygen functional groups at the expense of aliphatic carbons. Such a clearly negative impact of severe oxidation is considered to arise from significantly increased oxygen functionality which enhances the cross-link formation in the early stage of coal liquefaction. Physical, chemical, and surface physicochemical aspects of drying and oxidation and the role of water are also discussed. A North Dakota lignite (DECS-1) coal was studied for its behaviors in non-catalytic and catalytic liquefaction. Reactions were carried out at temperatures between 250 and 450°C. Regardless the reaction solvents and the catalyst being used, the optimum temperature was found to be 400°C. The donor solvent has a significant effect over the conversion especially at temperatures higher than 350°C.
Download or read book The Oxidation of an Asturian Bituminous Coal in Air and Its Influence on Subsequent Activation by Steam written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Effects of Low-temperature Catalytic Pretreatments on Coal Structure and Reactivity in Liquefaction. [Quarterly] Technical Progress Report, April--June 1993 PDF Online Free](https://books.google.com/books/content/images/frontcover/hz-KDAEACAAJ?fife=w200-h370)
Author :
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ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.:/5 (685 download)
Download or read book Effects of Low-temperature Catalytic Pretreatments on Coal Structure and Reactivity in Liquefaction. [Quarterly] Technical Progress Report, April--June 1993 written by and published by . This book was released on 1993 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this quarter, progress has been made in the following two aspects: (1) effects of drying and mild oxidation on conversion and product distribution during non-catalytic and catalytic liquefaction of a Montana subbituminous coal (DECS-9); and (2) effects of solvent and catalyst on conversion and structural changes of a Texas subbituminous coal (DECS-1). Influence of drying and mild oxidation on catalytic and non-catalytic liquefaction (at 350C for 30 min with 6.9 MPa (cold) H2 was studied using Wyodak subbituminous coal. For non-catalytic runs, fresh raw coal gave higher conversion and higher oil yield than both the vacuum- and air-dried coals, regardless of the solvent. Compared to the vacuum-dried coal, the coal dried in air in 100C for 2 h gave a better conversion in the presence of either a hydrogen donor tetralin or a non-donor 1-methylnaphthalene (1-MN) solvent. Catalytic runs were performed using in-situ generated molybdenum sulfide catalyst from ammonium tetrathiomolybdate (ATTM) precursor impregnated on either raw coal or predried coal samples. The solvent-free runs using ATTM loaded on the raw coal gave higher conversion and higher oil yield than loading ATTM on vacuum- or air-dried coal. In the presence of either tetralin or 1-MN, however, the runs using ATTM loaded on air-dried coal afford better conversions and oil yields as compared to the runs using vacuum-dried coal. Upon drying coal in air at 150C for 20 h, the conversion significantly decreased to a lower value than that of the vacuum-dried coal in the non-catalytic runs, and the same trend was observed in the runs of the dried coals loaded with ATTM. Physical, chemical, and surface chemical aspects of effects of drying and oxidation and the role of water are also discussed in the report.
Author :
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ISBN 13 :
Total Pages : 506 pages
Book Rating : 4.:/5 (319 download)
Download or read book Report of Investigations written by and published by . This book was released on 1954 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. Energy Research and Development Administration. Technical Information Center
Publisher :
ISBN 13 :
Total Pages : 484 pages
Book Rating : 4.:/5 (31 download)
Download or read book Coal Processing, Production, and Properties written by United States. Energy Research and Development Administration. Technical Information Center and published by . This book was released on 1976 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 948 pages
Book Rating : 4.3/5 (91 download)
Download or read book Bulletin written by and published by . This book was released on 1952 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 1038 pages
Book Rating : 4.E/5 ( download)
Download or read book Petroleum Refiner written by and published by . This book was released on 1950 with total page 1038 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. Bureau of Mines
Publisher :
ISBN 13 :
Total Pages : 1042 pages
Book Rating : 4.F/5 ( download)
Download or read book Bulletin written by United States. Bureau of Mines and published by . This book was released on 1950 with total page 1042 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 514 pages
Book Rating : 4.3/5 (243 download)
Download or read book Report of Investigations. [no.2002 to No.7380] written by and published by . This book was released on 1954 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : American Chemical Society. Meeting
Publisher :
ISBN 13 :
Total Pages : 1256 pages
Book Rating : 4.:/5 (43 download)
Download or read book Book of Abstracts written by American Chemical Society. Meeting and published by . This book was released on 1984 with total page 1256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 680 pages
Book Rating : 4.:/5 (31 download)
Download or read book Fossil Energy Update written by and published by . This book was released on 1977 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Rajesh Kumar Jyothi
Publisher : Springer Nature
ISBN 13 : 3030685020
Total Pages : 665 pages
Book Rating : 4.0/5 (36 download)
Download or read book Clean Coal Technologies written by Rajesh Kumar Jyothi and published by Springer Nature. This book was released on 2021-05-10 with total page 665 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the state of art of the several advanced approaches to beneficiation of coal. The influence of recent technology attains the advantages of processing coal, purification studies, rheological behavior, and the mineral beneficiation. The experts collected in this volume have contributed significantly to the enrichment in the in depth knowledge not only in context of working knowledge, but also future prospects of clean coal technology.
Author : Advisory Committee on Technology and Society
Publisher : National Academies Press
ISBN 13 : 9780309037860
Total Pages : 1298 pages
Book Rating : 4.0/5 (378 download)
Download or read book Cities and Their Vital Systems written by Advisory Committee on Technology and Society and published by National Academies Press. This book was released on 1989 with total page 1298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cities and Their Vital Systems asks basic questions about the longevity, utility, and nature of urban infrastructures; analyzes how they grow, interact, and change; and asks how, when, and at what cost they should be replaced. Among the topics discussed are problems arising from increasing air travel and airport congestion; the adequacy of water supplies and waste treatment; the impact of new technologies on construction; urban real estate values; and the field of "telematics," the combination of computers and telecommunications that makes money machines and national newspapers possible.
