Determining the kinetics of sunflower hulls using dilute acid pretreatment in the production of xylose and furfural

Abstract: Pretreatment of sunflower hulls was conducted under varied dilute acid concentrations (0.5–2.0 wt%), reaction temperatures ranging between 140°C and 160°C and the reaction time up to 30 min. The conversion of xylan into xylose and furfural was investigated. The maximum xylose and furfural recoveries, 54.5±0.7 and 24.0±1.1 wt%, respectively, were obtained at different reaction times with 2.0 wt% acid concentration at 160°C. The experimental data were fitted into a two-step kinetic model based on irreversible pseudo-first-order kinetics at each step. The model was successfully validated using the F-test. Sunflower hulls showed a greater recalcitrance to acid pretreatment than other agricultural crops, such as kenaf, sorghum and sunn hemp. This feature was ascribed to the occurrence of a wax layer on the cell wall surface with a high lignin content, which may act as a barrier hindering the acid access to acetyl linkages in xylan.

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch

Erschienen in
Determining the kinetics of sunflower hulls using dilute acid pretreatment in the production of xylose and furfural ; volume:3 ; number:1 ; year:2014 ; pages:69-75
Green processing & synthesis ; 3, Heft 1 (2014), 69-75

Urheber
Kamireddy, Srinivas Reddy
Kozliak, Evguenii I.
Tucker, Melvin
Ji, Yun

DOI
10.1515/gps-2013-0095
URN
urn:nbn:de:101:1-2501120300588.925970785378
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
15.08.2025, 07:35 MESZ

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Beteiligte

  • Kamireddy, Srinivas Reddy
  • Kozliak, Evguenii I.
  • Tucker, Melvin
  • Ji, Yun

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