Dilute Sulphuric Acid Pretreatment of Corn Stover at Long Residence Times

G. Kálmán, E. Varga, K. Réczey

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Corn stover, the most abundant agricultural by-product in Hungary, is a promising raw material for the production of fuel ethanol because of its high cellulose content and availability. Corn stover was prehydrolysed with dilute (w = 0.5 - 5.0 %) sulphuric acid. Effect of relatively low reaction temperature (120 °C) and long residence times (60 to 120 min) was investigated. Combined severity factor (CSF) was used to combine the parameters into a single reaction ordinate. Theoretical hemicellulose solubilisation was observed alter several pretreatments with at least 2 % acid for at least 90 minutes. Glucan solubilisation was relatively low at the same time (i.e. 11 % on samples pretreated with w = 2 % acid for 90 minutes). Treatment with w = 5 % acid produced a superior substrate for the cellulase enzyme. Highest fibrous glucan conversion (68 %) with 15 FPU enzyme was reached after pretreatment with w = 5 % acid for 120 minutes.

Original languageEnglish
Pages (from-to)151-157
Number of pages7
JournalChemical and Biochemical Engineering Quarterly
Volume16
Issue number4
Publication statusPublished - 2002

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Zea mays
Acids
Glucans
Enzymes
Ethanol fuels
Cellulase
Hungary
Cellulose
Byproducts
Raw materials
Ethanol
Availability
Temperature
Substrates

Keywords

  • Combined severity factor
  • Corn stover
  • Dilute acid pretreatment
  • Enzymatic hydrolysis

ASJC Scopus subject areas

  • Biotechnology
  • Chemical Engineering(all)

Cite this

Dilute Sulphuric Acid Pretreatment of Corn Stover at Long Residence Times. / Kálmán, G.; Varga, E.; Réczey, K.

In: Chemical and Biochemical Engineering Quarterly, Vol. 16, No. 4, 2002, p. 151-157.

Research output: Contribution to journalArticle

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