Delignification of Date Palm Fronds using Modified Organosolv Technique
Abstract In this study, modified organic solvent (organosolv) method was applied to remove high lignin content in the date palm fronds (type Al-Zahdi) which was taken from the Iraqi gardens. In modified organosolv, lignocellulosic material is fractionated into its constituents (lignin, cellul...
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Al-Khwarizmi College of Engineering – University of Baghdad
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doaj-1197b68262b64c418055670f96f070cc2020-11-24T21:22:09Zeng Al-Khwarizmi College of Engineering – University of BaghdadAl-Khawarizmi Engineering Journal1818-11712312-07892017-09-0113310.22153/kej.2017.07.001Delignification of Date Palm Fronds using Modified Organosolv TechniqueYasmeen Salih Mahdi0Asem Hassan Mohammed1Alaa Kareem Mohammed2Department of Biochemical Engineering / Al-Khwarizmi Engineering College / University of BaghdadInstitute of Technology Baghdad/ Chemical Industries/ Middle Technical UniversityDepartment of Biochemical Engineering / Al-Khwarizmi Engineering College / University of Baghdad Abstract In this study, modified organic solvent (organosolv) method was applied to remove high lignin content in the date palm fronds (type Al-Zahdi) which was taken from the Iraqi gardens. In modified organosolv, lignocellulosic material is fractionated into its constituents (lignin, cellulose and hemicellulose). In this process, solvent (organic)-water is brought into contact with the lignocellulosic biomass at high temperature, using stainless steel reactor (digester). Therefor; most of hemicellulose will remove from the biomass, while the solid residue (mainly cellulose) can be used in various industrial fields. Three variables were studied in this process: temperature, ratio of ethanol to water and digestion time. Statistical experimental design type Central Composite Design (CCD) has been used to find a mathematical relationship between the variables and the remaining lignin percent as dependent variable. The results obtained in this study were represented by a polynomial mathematical equation of the second degree. The results showed that the best digestion time was (80 minutes), which gave the best percent remaining concentration of lignin (3%) at temperature of 185oC and ratio of ethanol: water equal to 50: 50 wt/wt. In order to reduce digesting time, the effect of using different catalysts have been studied such as (NaOH, H2SO4, Ca (OH) 2) at low concentration (0.025, 0.025, 0.05M) respectively. It was found that the best catalyst is sodium hydroxide at concentration (0.025) mol/L which gave the same percent of lignin 3% but with low digestion time about 30 min. Keywords: Biomass pre-treatment, delignification, lignin, organosolv, date palm fronds. http://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/370Biomass pre-treatment, delignification, lignin, organosolv, date palm fronds. |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yasmeen Salih Mahdi Asem Hassan Mohammed Alaa Kareem Mohammed |
spellingShingle |
Yasmeen Salih Mahdi Asem Hassan Mohammed Alaa Kareem Mohammed Delignification of Date Palm Fronds using Modified Organosolv Technique Al-Khawarizmi Engineering Journal Biomass pre-treatment, delignification, lignin, organosolv, date palm fronds. |
author_facet |
Yasmeen Salih Mahdi Asem Hassan Mohammed Alaa Kareem Mohammed |
author_sort |
Yasmeen Salih Mahdi |
title |
Delignification of Date Palm Fronds using Modified Organosolv Technique |
title_short |
Delignification of Date Palm Fronds using Modified Organosolv Technique |
title_full |
Delignification of Date Palm Fronds using Modified Organosolv Technique |
title_fullStr |
Delignification of Date Palm Fronds using Modified Organosolv Technique |
title_full_unstemmed |
Delignification of Date Palm Fronds using Modified Organosolv Technique |
title_sort |
delignification of date palm fronds using modified organosolv technique |
publisher |
Al-Khwarizmi College of Engineering – University of Baghdad |
series |
Al-Khawarizmi Engineering Journal |
issn |
1818-1171 2312-0789 |
publishDate |
2017-09-01 |
description |
Abstract
In this study, modified organic solvent (organosolv) method was applied to remove high lignin content in the date palm fronds (type Al-Zahdi) which was taken from the Iraqi gardens. In modified organosolv, lignocellulosic material is fractionated into its constituents (lignin, cellulose and hemicellulose). In this process, solvent (organic)-water is brought into contact with the lignocellulosic biomass at high temperature, using stainless steel reactor (digester). Therefor; most of hemicellulose will remove from the biomass, while the solid residue (mainly cellulose) can be used in various industrial fields. Three variables were studied in this process: temperature, ratio of ethanol to water and digestion time. Statistical experimental design type Central Composite Design (CCD) has been used to find a mathematical relationship between the variables and the remaining lignin percent as dependent variable. The results obtained in this study were represented by a polynomial mathematical equation of the second degree. The results showed that the best digestion time was (80 minutes), which gave the best percent remaining concentration of lignin (3%) at temperature of 185oC and ratio of ethanol: water equal to 50: 50 wt/wt. In order to reduce digesting time, the effect of using different catalysts have been studied such as (NaOH, H2SO4, Ca (OH) 2) at low concentration (0.025, 0.025, 0.05M) respectively. It was found that the best catalyst is sodium hydroxide at concentration (0.025) mol/L which gave the same percent of lignin 3% but with low digestion time about 30 min.
Keywords: Biomass pre-treatment, delignification, lignin, organosolv, date palm fronds.
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topic |
Biomass pre-treatment, delignification, lignin, organosolv, date palm fronds. |
url |
http://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/370 |
work_keys_str_mv |
AT yasmeensalihmahdi delignificationofdatepalmfrondsusingmodifiedorganosolvtechnique AT asemhassanmohammed delignificationofdatepalmfrondsusingmodifiedorganosolvtechnique AT alaakareemmohammed delignificationofdatepalmfrondsusingmodifiedorganosolvtechnique |
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