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Notes on the Sampling and Analysis of Coal

Notes on the Sampling and Analysis of Coal


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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: ...lower proportion of inert volatile matter than the coals of the interior and western fields. INFLUENCE OF TEMPERATURE ON YIELD OF VOLATILE MATTER. The amount and composition of the volatile matter that may be obtained from a given coal varies with the temperature and the method of heating. The influence of these factors is responsible for the variations that are frequently obtained in the analytical determination of volatile matter. Failure to observe the same method of heat treatment in different laboratories may result in deviations of 2 or 3 per cent in the amount of volatile matter and fixed carbon reported on the same sample of coal. The influence of temperature in causing variations of volatile matter b is shown in figure 4. The figure indicates that more volatile matter is obtained at the higher temperatures, although the ratio between temperature and percentage of volatile matter varies in the different types of coal. The curve for anthracite is practically a straight line; the curves for the three bituminous coals become horizontal when the temperature involved is about 950 C; the curve for Pocahontas coal has a slight upward inclination even for the higher temperatures. From the standpoint of the analyst, 950 to 1,000 C. appears to be the best temperature for the determination of volatile matter, as slight variations in temperature on the upper end of the curve produce less deviation in results. Experience has shown that duplicate determinations made within these limits of temperature usually agree within 0.5 per cent. COMPOSITION OF FIXED CARBON. The residue of coke left in the crucible after the ash has been deducted is reported as "fixed carbon." The fixed carbon does not represent the total carbon in the coal, as a considerable part ...


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Product Details
  • ISBN-13: 9781130598759
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 24
  • Spine Width: 1 mm
  • Width: 189 mm
  • ISBN-10: 1130598756
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 64 gr

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