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Proceedings Paper

Optical Approach To The Measurement Of Delignification In Kraft Pulping: Part B: Using Infrared Spectroscopy.
Author(s): E Adam; N Sugden
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Paper Abstract

A study of the infrared (IR) absorption characteristics of dried kraft pulp sheets was made. This was done in order to assess the potential of using this approach as the basis for determining residual lignin, or Kappa number, in pulp after cooking. Strong positive linear correlations were obtained between Kappa number and IR absorbance at 1509 cm-for pulps made from different wood species, produced in different mills and having a Kappa number range of 13-37. For pulps from some mills, made from the same wood furnish and having a small Kappa number range, the degree of correlation was seriously reduced. The method requires the use of moisture-free pulp specimens in the measurement of absorbance. It is suggested that it would be more suitable as the basis for a laboratory instrument than for an on-line, process Kappa number sensor.

Paper Details

Date Published: 23 October 1986
PDF: 6 pages
Proc. SPIE 0665, Optical Techniques for Industrial Inspection, (23 October 1986); doi: 10.1117/12.938754
Show Author Affiliations
E Adam, Sault College of Applied Arts and Technology (Canada)
N Sugden, Sault College of Applied Arts and Technology (Canada)

Published in SPIE Proceedings Vol. 0665:
Optical Techniques for Industrial Inspection
Paolo G. Cielo, Editor(s)

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