Pyrolysis of a western bituminous coal in a entrained flow reactor : a kinetic analysis

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Title Pyrolysis of a western bituminous coal in a entrained flow reactor : a kinetic analysis
Publication Type thesis
School or College College of Engineering
Department Chemical Engineering
Author Woodbury, David Walter
Date 1977
Description ABSTRACT Flash pyrolysis of a high volatile bituminous coal was studied by entraining small (94 or 133 ym) diameter particles in a pre-heated stream of nitrogen which passed through a heated stainless steel tube. Particle residence times in the tube ranged from 60 to 160 msec for temperatures of 570 to 730°C, and the particles were quickly cooled by mixing with cold nitrogen. The time-temperature history of the particles was calculated by incremental force and energy balances. The weight losses during subsequent heating were determined from the char which was collected in order to estimate the flash pyrolysis loss in the tube. A kinetic analysis of the pyrolysis data was analyzed by nonisothermal techniques since the particle time-temperature history in the tube was known. The weight loss data were successfully modeled by a set of independent parallel decomposition reactions. These data were used to calculate a distribution of activation energies for the set of first order reactions. There was a pronounced maximum in the distribution curve at an activation energy of 51 kcal/mole. An overall discrepancy of 2.4 percent in the weight loss data between the large and small particles indicates (from the kinetic analysis) that the initial coal decomposition products undergo further (secondary) reactions within the coal which reduce weight loss.
Type Text
Publisher University of Utah
Subject Pyrolysis; Bituminous coal
Dissertation Institution University of Utah
Dissertation Name MS
Language eng
Relation is Version of Digital reproduction of "Pyrolysis of a western bituminous coal in a entrained flow reactor : a kinetic analysis," J. Willard Marriott Library Special Collections, QD3.5 1977 .W66
Rights Management © David Walter Woodbury
Format application/pdf
Format Medium application/pdf
Format Extent 4,375,769 bytes
Identifier undthes,4726
Source Original: University of Utah J. Willard Marriott Library Special Collections,
Master File Extent 4,375,769 bytes
ARK ark:/87278/s6862jbx
Setname ir_etd
ID 191882
Reference URL https://collections.lib.utah.edu/ark:/87278/s6862jbx
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