Pretreatment-Catalyst Effects and the Combined Severity Parameter

Helena L. Chum, David K. Johnson, Stuart K. Black, Ralph P. Overend

Research output: Contribution to journalArticlepeer-review

338 Scopus Citations


Fractionation of lignocellulosic materials into high-yield cellulosic solid components can be accomplished with acid-catalyzed aqueous and mixed aqueous and nonaqueous media, with the latter leading to high lignin and xyland removal. Concepts combining only time and temperature pulping profile with catalyst concentration are presented to correlate these two types of fractionation methods with pulping variables. Severity concepts combining time and temperature only are often used in the pulp and paper industry. The present extension of this concept produces phenomenological descriptions that permit comparisons of different proceses and yield some pseudokinetic parameters for aspen (Populus tremuloides) acid-catalyzed fractionation.

Original languageAmerican English
Pages (from-to)1-14
Number of pages14
JournalApplied Biochemistry and Biotechnology - Part A Enzyme Engineering and Biotechnology
Issue number1
StatePublished - 1990

NREL Publication Number

  • ACNR/JA-16823


  • Catalyst effects
  • lignin
  • lignocellulosics
  • severity parameters
  • xylan


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