Valorization of Alkaline Peroxide Mechanical Pulp by Metal Chloride-Assisted Hydrotropic Pretreatment for Enzymatic Saccharification and Cellulose Nanofibrillation
Developing economical and sustainable fractionation technology of lignocellulose cell walls is the key to reaping the full benefits of lignocellulosic biomass. This study evaluated the potential of metal chloride-assisted <i>p</i>-toluenesulfonic acid (<i>p</i>-TsOH) hydrolys...
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doaj-62f154d9ffdb45a5a041a41c5850a9ec2020-11-25T00:30:41ZengMDPI AGPolymers2073-43602019-02-0111233110.3390/polym11020331polym11020331Valorization of Alkaline Peroxide Mechanical Pulp by Metal Chloride-Assisted Hydrotropic Pretreatment for Enzymatic Saccharification and Cellulose NanofibrillationHuiyang Bian0Xinxing Wu1Jing Luo2Yongzhen Qiao3Guigan Fang4Hongqi Dai5Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, ChinaJiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, ChinaJiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, ChinaJiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, ChinaChina Institute of Chemical Industry of Forestry Products, Chinese Academy of Forestry, Nanjing 210042, ChinaJiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, ChinaDeveloping economical and sustainable fractionation technology of lignocellulose cell walls is the key to reaping the full benefits of lignocellulosic biomass. This study evaluated the potential of metal chloride-assisted <i>p</i>-toluenesulfonic acid (<i>p</i>-TsOH) hydrolysis at low temperatures and under acid concentration for the co-production of sugars and lignocellulosic nanofibrils (LCNF). The results indicated that three metal chlorides obviously facilitated lignin solubilization, thereby enhancing the enzymatic hydrolysis efficiency and subsequent cellulose nanofibrillation. The CuCl<sub>2</sub>-assisted hydrotropic pretreatment was most suitable for delignification, resulting in a relatively higher enzymatic hydrolysis efficiency of 53.2%. It was observed that the higher residual lignin absorbed on the fiber surface, which exerted inhibitory effects on the enzymatic hydrolysis, while the lower lignin content substrates resulted in less entangled LCNF with thinner diameters. The metal chloride-assisted rapid and low-temperature fractionation process has a significant potential in achieving the energy-efficient and cost-effective valorization of lignocellulosic biomass.https://www.mdpi.com/2073-4360/11/2/331hydrotropic treatmentmetal chloridedelignificationenzymatic saccharificationlignocellulosic nanofibrils |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Huiyang Bian Xinxing Wu Jing Luo Yongzhen Qiao Guigan Fang Hongqi Dai |
spellingShingle |
Huiyang Bian Xinxing Wu Jing Luo Yongzhen Qiao Guigan Fang Hongqi Dai Valorization of Alkaline Peroxide Mechanical Pulp by Metal Chloride-Assisted Hydrotropic Pretreatment for Enzymatic Saccharification and Cellulose Nanofibrillation Polymers hydrotropic treatment metal chloride delignification enzymatic saccharification lignocellulosic nanofibrils |
author_facet |
Huiyang Bian Xinxing Wu Jing Luo Yongzhen Qiao Guigan Fang Hongqi Dai |
author_sort |
Huiyang Bian |
title |
Valorization of Alkaline Peroxide Mechanical Pulp by Metal Chloride-Assisted Hydrotropic Pretreatment for Enzymatic Saccharification and Cellulose Nanofibrillation |
title_short |
Valorization of Alkaline Peroxide Mechanical Pulp by Metal Chloride-Assisted Hydrotropic Pretreatment for Enzymatic Saccharification and Cellulose Nanofibrillation |
title_full |
Valorization of Alkaline Peroxide Mechanical Pulp by Metal Chloride-Assisted Hydrotropic Pretreatment for Enzymatic Saccharification and Cellulose Nanofibrillation |
title_fullStr |
Valorization of Alkaline Peroxide Mechanical Pulp by Metal Chloride-Assisted Hydrotropic Pretreatment for Enzymatic Saccharification and Cellulose Nanofibrillation |
title_full_unstemmed |
Valorization of Alkaline Peroxide Mechanical Pulp by Metal Chloride-Assisted Hydrotropic Pretreatment for Enzymatic Saccharification and Cellulose Nanofibrillation |
title_sort |
valorization of alkaline peroxide mechanical pulp by metal chloride-assisted hydrotropic pretreatment for enzymatic saccharification and cellulose nanofibrillation |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2019-02-01 |
description |
Developing economical and sustainable fractionation technology of lignocellulose cell walls is the key to reaping the full benefits of lignocellulosic biomass. This study evaluated the potential of metal chloride-assisted <i>p</i>-toluenesulfonic acid (<i>p</i>-TsOH) hydrolysis at low temperatures and under acid concentration for the co-production of sugars and lignocellulosic nanofibrils (LCNF). The results indicated that three metal chlorides obviously facilitated lignin solubilization, thereby enhancing the enzymatic hydrolysis efficiency and subsequent cellulose nanofibrillation. The CuCl<sub>2</sub>-assisted hydrotropic pretreatment was most suitable for delignification, resulting in a relatively higher enzymatic hydrolysis efficiency of 53.2%. It was observed that the higher residual lignin absorbed on the fiber surface, which exerted inhibitory effects on the enzymatic hydrolysis, while the lower lignin content substrates resulted in less entangled LCNF with thinner diameters. The metal chloride-assisted rapid and low-temperature fractionation process has a significant potential in achieving the energy-efficient and cost-effective valorization of lignocellulosic biomass. |
topic |
hydrotropic treatment metal chloride delignification enzymatic saccharification lignocellulosic nanofibrils |
url |
https://www.mdpi.com/2073-4360/11/2/331 |
work_keys_str_mv |
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1725325479567687680 |