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Quantification of hardwood black liquor contamination in pine black liquor, TAPPI Journal February 2024

ABSTRACT: The presence of hardwood black liquor contamination in pine black liquor can negatively impact brownstock washer and evaporator operation, as well as reduce soap separation and yield. It is also believed to negatively impact commercial kraft lignin production. It was desired to develop a method of quantitatively determining the amount of low-level hardwood liquor contamination in pine black liquor. A method employing pyrolysis-gas chromatography mass spectrometry (py-GCMS) was developed to perform the desired measurement. Laboratory cooks with carefully controlled blends of pine and hardwood chips were prepared, and the resulting liquor was measured using this technique. Additionally, samples of pine and hardwood black liquors were blended in known quantities and analyzed. All these samples were submitted as blind samples. The resulting analysis suggests the py-GCMS method was able to accurately determine the level of hardwood contamination between 1% to 10% hardwood liquor using a low-level calibration curve prepared with coniferyl alcohol and sinapyl alcohol as standards.

Overview of the Water Cluster Regulations, 1998 Cluster Rule Symposium Proceedings

Overview of the Water Cluster Regulations, 1998 Cluster Rule Symposium Proceedings

Guidance on Sampling and Analyzing Effluents for BAT Parameteres, 1998 Cluster Rule Symposium Proceedings

Guidance on Sampling and Analyzing Effluents for BAT Parameteres, 1998 Cluster Rule Symposium Proceedings

MACT Overview, 1998 Cluster Rule Symposium Proceedings

MACT Overview, 1998 Cluster Rule Symposium Proceedings

Fiberline Modifications to Reduce Environmental Impact, 1998 Cluster Rule Symposium Proceedings

Fiberline Modifications to Reduce Environmental Impact, 1998 Cluster Rule Symposium Proceedings

Cluster Rule - Practical Aspects of Bleach Plant Conversion, 1998 Cluster Rule Symposium Proceedings

Cluster Rule - Practical Aspects of Bleach Plant Conversion, 1998 Cluster Rule Symposium Proceedings

Condensate Stripping, 1998 Cluster Rule Symposium Proceedings

Condensate Stripping, 1998 Cluster Rule Symposium Proceedings

Condensate "Hardpiping" or "Recycling" Options", 1998 Cluster Rule Symposium Proceedings

Condensate "Hardpiping" or "Recycling" Options", 1998 Cluster Rule Symposium Proceedings

Low Volume High Concentration (LVHC) Non-conensable Gas (NCG) Collection and Thermal Oxidation, 1998 Cluster Rule Symposium Proceedings

Low Volume High Concentration (LVHC) Non-conensable Gas (NCG) Collection and Thermal Oxidation, 1998 Cluster Rule Symposium Proceedings

Stripper-Off-Gas Incineration Option, 1998 Cluster Rule Symposium Proceedings

Stripper-Off-Gas Incineration Option, 1998 Cluster Rule Symposium Proceedings

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