Download or read book Pyrolysis of Subbituminous Coal as it Relates to in Situ Gasification written by J. H. Campbell and published by . This book was released on 1976 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pyrolysis of Subbituminous Coal as it Relates to in Situ Gasification written by J. H. Campbell and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pyrolysis of Subbituminous Coal as it Relates to in Situ Gasification written by J. H. Campbell and published by . This book was released on 1976 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1977 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coal Pyrolysis written by George R. Gavalas and published by Elsevier Science & Technology. This book was released on 1982 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pyrolysis of Wyoming Subbituminous Coal Pyrolysis at 500 and 625 C Gas Evolution and Tar Production May Play Significant Roles in In situ Coal Gascation Pyrolysis Gas Mainly CO2 CO H2 and CH4 written by and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Continuous Carbonization Method Temperature and Carrier Gas on the Amounts of Individual Pyrolysis Products from a Subbituminous Coal written by Clarence Karr and published by . This book was released on 1966 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Two dimensional Studies of Coal Pyrolysis written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Two-dimensional pyrolysis behavior of large, instrumented blocks of subbituminous coal has been examined recently in support of in-situ coal gasification process development. Pyrolysis studies have traditionally dealt with small coal particles which were heated rapidly; but, by contrast, in-situ gasification involves slow heating of large coal blocks resulting from permeability enhancement operations or, perhaps, roof collapse. Experiments utilizing maximum reactor temperatures of 500° to 1000°C, achieved over 4- to 50-hr time periods, have produced data correlating tar and gas production rates and composition with maximum temperature and heating rate.
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration. Technical Information Center and published by . This book was released on 1977 with total page 1680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Macroscopic Sample Effects on the Pyrolysis of Bituminous and Subbituminous Coals at Underground Coal Gasification Heating Rates written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Two-dimensional pyrolysis behavior of 14- to 16-cm instrumented blocks of bituminous and subbituminous coals is being examined in support of in situ coal gasification process development. Results were obtained at conditions expected to occur underground. Experiments utilizing maximum reactor temperatures of 500 to 1000/sup 0/C over periods of 4 to 60 h produced data correlating tar and gas production rates and composition with maximum temperature and heating rate. Chars produced by some experiments have exhibited marked pyrophoricity. Furthermore, thermal profiles within the blocks during pyrolysis indicate clearly that volatilization of water is the heat transfer rate-limiting mechanism. Gas production from as-received specimens is observed to be significantly greater than that measured during the pyrolysis of powdered coal at similar heating rates. Diffusion of steam from a shrinking core of wet coal is postulated to account for this phenomenon. 11 figures.
Download or read book Propagation Rate of the Pyrolysis Front in Reverse In situ Coal Gasification written by Steven Michael Hansen and published by . This book was released on 1977 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pyrolysis of Large Coal Blocks written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dewatering of coal blocks at in-situ moisture levels was shown to markedly affect pyrolysis gas production by being the rate-limiting mechanism in heat transfer, and by causing self-gasification of the block as steam diffuses from a shrinking core of damp coal through a hot, outer layer of char. Cracking of product oil vapors as they diffuse outward may also contribute to the increased combustible gas evolution of block pyrolysis compared to powder pyrolysis. These results influence modeling and design of in-situ coal gasification. Since no data are available on coal-block pyrolysis, improved understanding of heat and mass transfer effects significantly improves semitheoretical models which have depended on powder pyrolysis data. For satisfactory resource recovery, the shrinking core of unreacted coal makes it critical to limit flame-front speed. If the flame front moves too fast, only an outer layer of any large masses of coal will be gasified, leaving damp, ungasified centers behind the front. More experimentation is planned to quantify and expand these results. Specifically, a matrix of experiments is being performed at 0.3°C/min and at 3.0°C/min, proceeding to maximum temperatures of 500 to 1000°C. Analyses will be made of data on oil, char, and gas yields; oil, char, and gas compositions; thermal histories; and oil and gas physical properties. Later experiments are planned to investigate the effects of pressure, reducing gas atmospheres, and other coal ranks (lignites, caking and noncaking bituminous coals). The ultimate result is a satisfactorily accurate model of pyrolysis as it affects in-situ coal gasification.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 1344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossil Energy Program Report written by United States. Energy Research and Development Administration. Assistant Administrator for Fossil Energy and published by . This book was released on 1976 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossil Energy Program Report written by United States. Office of the Assistant Secretary for Fossil Energy and published by . This book was released on 1978 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossil Energy Program Report 1 October 1976 30 September 1977 written by United States. Office of Fossil Energy and published by . This book was released on 1978 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:
