Natural Resources

Categories: Natural Resources
Origin: CSA
Close date: Oct 2, 2019
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Scope

This Standard describes the thermal analysis of kraft lignin using thermogravimetric methods.

Thermogravimetry can be used to determine the initial decomposition temperature(s), rate(s) of decomposition and the temperature at maximum decomposition of various materials including lignins at atmospheric pressure. All these temperatures are solely based on the mass loss and are not necessarily the real values because not all decompositions can generate evaporation at atmospheric pressure. Thus, these values are only for comparison purpose.

This procedure is applicable to solid (e.g. powdered form) lignins isolated from the kraft pulping process. It does not apply to raw black liquor.

Thermogravimetric measurement may be performed under different types of atmosphere, e.g. an inert atmosphere or an oxidative atmosphere.

Categories: Natural Resources
Origin: CSA
Close date: Oct 2, 2019
View moreView less
 

Scope

This standard describes a method for the determination of the glass transition temperature (Tg) of kraft lignin. The procedure utilizes differential scanning calorimetry (DSC).

This procedure is applicable to solid lignins (for example powdered form) isolated from the kraft pulping process.

It does not apply to raw black liquor and lignin in the sodium form produced from the kraft pulping process.