Mineral matter effects on the rapid pyrolysis and hydropyrolysis of a bituminous coal. 1. Effects on yields of char,tar and light gaseous volatiles |
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Authors: | Howard D. Franklin William A. Peters Jack B. Howard |
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Affiliation: | Department of Chemical Engineering and Energy Laboratory, Massachusetts Institute of Technology, Cambridge, Mass. 02139, USA |
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Abstract: | The effects of minerals on product compositions from rapid pyrolysis of a Pittsburgh Seam bituminous coal were investigated. Whole, demineralized, and mineral treated samples of pulverized coal were heated in 100 KPa helium or 6.9 MPa hydrogen at 1000 K s?1 to temperatures of up to 1300 K. Yields of char, tar and individual gaseous products were determined as a function of time-temperature conditions. Clays, iron-sulphur minerals, and quartz had few effects on pyrolysis in helium. Calcium minerals decreased yields of hydrocarbon products and increased yields of CO in helium pyrolysis. Calcite and clays decreased yields of CH4 from hydropyrolysis, whereas iron-sulphur minerals had little effect on pyrolysis at 6.9 MPa H2. Whole coal results were similar to demineralized coal results under all conditions. |
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Keywords: | bituminous coal pyrolysis mineral matter |
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