Optical Approach To The Measurement Of Delignification In Kraft Pulping: Part B: Using Infrared Spectroscopy.

E Adam; N Sugden

doi:10.1117/12.938754

23 October 1986 Optical Approach To The Measurement Of Delignification In Kraft Pulping: Part B: Using Infrared Spectroscopy.

E Adam, N Sugden

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Proceedings Volume 0665, Optical Techniques for Industrial Inspection; (1986) https://doi.org/10.1117/12.938754
Event: 1986 Quebec Symposium, 1986, Quebec City, Canada

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.

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E Adam and N Sugden "Optical Approach To The Measurement Of Delignification In Kraft Pulping: Part B: Using Infrared Spectroscopy.", Proc. SPIE 0665, Optical Techniques for Industrial Inspection, (23 October 1986); https://doi.org/10.1117/12.938754

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KEYWORDS

Absorbance

Infrared spectroscopy

Absorption

Infrared radiation

Phase modulation

Inspection

Transmittance

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