Enhancement of high xylan recovery from black liquor of alkaline pretreated oil palm frond and its physicochemical properties

Nur Syahirah Ahmad Sobri, Shuhaida Harun, Nor Shahirah Ishak, Jamaliah Md Jahim, Abdul Wahab Mohammad

Research output: Contribution to journalArticle

Abstract

The xylan recovered from alkaline black liquor (ABL) of oil palm frond (OPF) has the potential to be converted into value-added products that hold promise, especially for the pharmaceutical industry. This research highlights the maximum xylan relative recovery extracted from ABL by varying the extraction parameters such as the concentration of sodium hydroxide (NaOH) (2 to 10%) (w/v), reaction temperature (60 to 140 °C), and extraction time (30 to 150 min), followed by a 2-stage precipitation method. 6 M of hydrochloric acid (HCl) was used in the first stage to separate the lignin sub-fraction (LF) from the ABL, and 95% ethanol was used in the second stage to obtain xylan sub-fraction (XF). The optimal condition of 6% NaOH (w/v), 100 °C, and 60 min was able to recover 84% of xylan, with low contamination of lignin (7.7%) and glucan (0.3%) in XF, while higher contamination of lignin (19.3%) and glucan (10.9%) with lower amount of xylan (8.8%) were found in LF. The amount of lignin and glucan in LF through the first precipitation was higher than in XF from the second precipitation, leaving remaining fraction of XF mainly composed of xylan. In sum, the developed process reduced the alkali consumption while retaining a high xylan recovery under mild process conditions.

Original languageEnglish
Pages (from-to)5400-5421
Number of pages22
JournalBioResources
Volume14
Issue number3
DOIs
Publication statusPublished - 1 Jan 2019

Fingerprint

Xylans
Palm oil
physicochemical property
lignin
Lignin
Recovery
oil
Glucans
pharmaceutical industry
hydrochloric acid
Contamination
hydroxide
ethanol
Sodium Hydroxide
Parameter extraction
sodium
Hydrochloric Acid
Alkalies
Hydrochloric acid
Drug products

Keywords

  • Acid-insoluble lignin
  • Alkaline extraction
  • Glucan recovery
  • Hemicellulose
  • Lignocellulose
  • Oil palm frond
  • Sodium hydroxide
  • Xylan recovery

ASJC Scopus subject areas

  • Environmental Engineering
  • Bioengineering
  • Waste Management and Disposal

Cite this

Enhancement of high xylan recovery from black liquor of alkaline pretreated oil palm frond and its physicochemical properties. / Sobri, Nur Syahirah Ahmad; Harun, Shuhaida; Ishak, Nor Shahirah; Md Jahim, Jamaliah; Mohammad, Abdul Wahab.

In: BioResources, Vol. 14, No. 3, 01.01.2019, p. 5400-5421.

Research output: Contribution to journalArticle

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