Chemical and thermal properties of purified kenaf core and oil palm empty fruit bunch lignin

Sharifah Nurul Ain Syed Hashim, Sarani Zakaria, Chin Hua Chia, Fei Ling Pua, Sharifah Nabihah Syed Jaafar

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Chemical and thermal properties of pure lignin are depending on the plant origin, extraction method and type of lignocellulosic. In this study, lignin from oil palm empty fruit bunch (EFB) and kenaf core were recovered from soda black liquor by two steps of acid precipitation with hydrochloric acid and followed by soxhlet with n-hexane. The XRD analysis of purified EFB lignin (EAL) and purified kenaf core lignin (KAL) exhibited amorphous properties, similar to the standard alkali lignin (SAL). The FTIR and Raman spectra showed that all samples consist of HGS unit. In FTIR, the syringyl unit is assigned at (1125 cm-1), (1327 and 1121 cm-1) and (1326 and 1117 cm-1) meanwhile the guaicyl unit is assigned at (1263, 1212 and 1028 cm-1), (1271, 1217 and 1028 cm-1) and (1270, 1211 and 1030 cm-1) for SAL, EAL and KAL, respectively. The peak around 1160 cm-1 represents C-O stretching of conjugated ester group present in HGS lignin. As for Raman, the HGS unit exists in the range of 1100-1400 cm-1. Among the purified samples, the TGA result showed that KAL has a better thermal stability with the residue of 36.49% and higher Tg value which is 152.69°C.

Original languageEnglish
Pages (from-to)1649-1653
Number of pages5
JournalSains Malaysiana
Volume45
Issue number11
Publication statusPublished - 1 Nov 2016

Fingerprint

kenaf
Elaeis guineensis
thermal properties
lignin
physicochemical properties
fruits
alkalis
waste liquors
Raman spectroscopy
hydrochloric acid
acid deposition
thermal stability
hexane
esters
sampling

Keywords

  • Acid precipitation
  • Black liquor
  • HGS unit
  • Soda lignin
  • Soxhlet extraction

ASJC Scopus subject areas

  • General

Cite this

Chemical and thermal properties of purified kenaf core and oil palm empty fruit bunch lignin. / Hashim, Sharifah Nurul Ain Syed; Zakaria, Sarani; Chia, Chin Hua; Pua, Fei Ling; Syed Jaafar, Sharifah Nabihah.

In: Sains Malaysiana, Vol. 45, No. 11, 01.11.2016, p. 1649-1653.

Research output: Contribution to journalArticle

@article{e43785ac4b1a4b35b5810501f4ef4d73,
title = "Chemical and thermal properties of purified kenaf core and oil palm empty fruit bunch lignin",
abstract = "Chemical and thermal properties of pure lignin are depending on the plant origin, extraction method and type of lignocellulosic. In this study, lignin from oil palm empty fruit bunch (EFB) and kenaf core were recovered from soda black liquor by two steps of acid precipitation with hydrochloric acid and followed by soxhlet with n-hexane. The XRD analysis of purified EFB lignin (EAL) and purified kenaf core lignin (KAL) exhibited amorphous properties, similar to the standard alkali lignin (SAL). The FTIR and Raman spectra showed that all samples consist of HGS unit. In FTIR, the syringyl unit is assigned at (1125 cm-1), (1327 and 1121 cm-1) and (1326 and 1117 cm-1) meanwhile the guaicyl unit is assigned at (1263, 1212 and 1028 cm-1), (1271, 1217 and 1028 cm-1) and (1270, 1211 and 1030 cm-1) for SAL, EAL and KAL, respectively. The peak around 1160 cm-1 represents C-O stretching of conjugated ester group present in HGS lignin. As for Raman, the HGS unit exists in the range of 1100-1400 cm-1. Among the purified samples, the TGA result showed that KAL has a better thermal stability with the residue of 36.49{\%} and higher Tg value which is 152.69°C.",
keywords = "Acid precipitation, Black liquor, HGS unit, Soda lignin, Soxhlet extraction",
author = "Hashim, {Sharifah Nurul Ain Syed} and Sarani Zakaria and Chia, {Chin Hua} and Pua, {Fei Ling} and {Syed Jaafar}, {Sharifah Nabihah}",
year = "2016",
month = "11",
day = "1",
language = "English",
volume = "45",
pages = "1649--1653",
journal = "Sains Malaysiana",
issn = "0126-6039",
publisher = "Penerbit Universiti Kebangsaan Malaysia",
number = "11",

}

TY - JOUR

T1 - Chemical and thermal properties of purified kenaf core and oil palm empty fruit bunch lignin

AU - Hashim, Sharifah Nurul Ain Syed

AU - Zakaria, Sarani

AU - Chia, Chin Hua

AU - Pua, Fei Ling

AU - Syed Jaafar, Sharifah Nabihah

PY - 2016/11/1

Y1 - 2016/11/1

N2 - Chemical and thermal properties of pure lignin are depending on the plant origin, extraction method and type of lignocellulosic. In this study, lignin from oil palm empty fruit bunch (EFB) and kenaf core were recovered from soda black liquor by two steps of acid precipitation with hydrochloric acid and followed by soxhlet with n-hexane. The XRD analysis of purified EFB lignin (EAL) and purified kenaf core lignin (KAL) exhibited amorphous properties, similar to the standard alkali lignin (SAL). The FTIR and Raman spectra showed that all samples consist of HGS unit. In FTIR, the syringyl unit is assigned at (1125 cm-1), (1327 and 1121 cm-1) and (1326 and 1117 cm-1) meanwhile the guaicyl unit is assigned at (1263, 1212 and 1028 cm-1), (1271, 1217 and 1028 cm-1) and (1270, 1211 and 1030 cm-1) for SAL, EAL and KAL, respectively. The peak around 1160 cm-1 represents C-O stretching of conjugated ester group present in HGS lignin. As for Raman, the HGS unit exists in the range of 1100-1400 cm-1. Among the purified samples, the TGA result showed that KAL has a better thermal stability with the residue of 36.49% and higher Tg value which is 152.69°C.

AB - Chemical and thermal properties of pure lignin are depending on the plant origin, extraction method and type of lignocellulosic. In this study, lignin from oil palm empty fruit bunch (EFB) and kenaf core were recovered from soda black liquor by two steps of acid precipitation with hydrochloric acid and followed by soxhlet with n-hexane. The XRD analysis of purified EFB lignin (EAL) and purified kenaf core lignin (KAL) exhibited amorphous properties, similar to the standard alkali lignin (SAL). The FTIR and Raman spectra showed that all samples consist of HGS unit. In FTIR, the syringyl unit is assigned at (1125 cm-1), (1327 and 1121 cm-1) and (1326 and 1117 cm-1) meanwhile the guaicyl unit is assigned at (1263, 1212 and 1028 cm-1), (1271, 1217 and 1028 cm-1) and (1270, 1211 and 1030 cm-1) for SAL, EAL and KAL, respectively. The peak around 1160 cm-1 represents C-O stretching of conjugated ester group present in HGS lignin. As for Raman, the HGS unit exists in the range of 1100-1400 cm-1. Among the purified samples, the TGA result showed that KAL has a better thermal stability with the residue of 36.49% and higher Tg value which is 152.69°C.

KW - Acid precipitation

KW - Black liquor

KW - HGS unit

KW - Soda lignin

KW - Soxhlet extraction

UR - http://www.scopus.com/inward/record.url?scp=85002528403&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85002528403&partnerID=8YFLogxK

M3 - Article

VL - 45

SP - 1649

EP - 1653

JO - Sains Malaysiana

JF - Sains Malaysiana

SN - 0126-6039

IS - 11

ER -