Empty Palm Fruit Bunches—A CO&lt;SUB&gt;2&lt;/SUB&gt;-Based Biorefinery Concept

Jaafar, Sharifah Nabihah Binti Syed; Haimer, Emmerich; Liebner, Falk; Böhmdorfer, Stefan; Potthast, Antje; Rosenau, Thomas

doi:10.1166/jbmb.2011.1140

Cited by 5 publications

(1 citation statement)

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“…32 The functional group of C-O-C corresponds to the ether groups in lignin, which are present at 1250 cm -1 and 1050 cm -1 . 34 The reduction of this peak after the alkali and acid treatments was correlated with the partial removal of lignin in the OPTF, as the ether groups between lignin and cellulose were broken. Next, the peak at 1371 cm -1 was assigned to the cellulose crystallinity, indicating -CH bending.…”

Section: Results and Discussion Delignificationmentioning

confidence: 94%

Understanding the Effects of Alkali Pretreatment and Acid Treatment of Oil Palm Trunk Fibres

Norizan¹,

Sauta²,

Hashim³

et al. 2019

Cellulose Chem. Technol.

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Cellulose is becoming a super-material due to its excellent properties and renewability. Understanding its resistance to chemical treatments is important to boost the usage and accessibility. In this study, oil palm trunk fibre (OPTF) was pretreated with NaOH and NH 4 OH either in an autoclave or in a water bath. The optimised alkaline pretreated samples were then subjected to acid treatment with acetic acid (AA). The results showed the highest delignification was achieved by using 12% of NaOH via the autoclaving process, with 10685.4 mg/L of lignin and 7.8% of acid insoluble lignin (AIL). The Fourier-transform infrared (FTIR) analysis confirmed the removal of lignin by the reduction of the peaks at 1250 and 1750 cm-1 , representing C=O and CO -C, respectively, from lignin. The delignification was pronounced when concentrated AA was used and the lignin-to-cellulose ratio decreased to about 52%. Other than lignin, amorphous celluloses were also removed during the AA treatment, causing an increment in the crystallinity index (CrI) and crystallite size (L). Consequently, the AA treatment had led to the depolymerisation of crystalline cellulose and affected the viscosity-average molecular weight (M η).

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Section: Results and Discussion Delignificationmentioning

confidence: 94%