Valorization of Rice Husk for the Production of Porous Biochar Materials
Rice husk (RH) is one of the most important crop residues around the world, making its valorization an urgent and important topic in recent years. This work focused on the production of RH-based biochars at different pyrolysis temperatures from 400 to 900 °C and holding times from 0 to 90 min. Furth...
Main Authors: | , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2021-04-01
|
Series: | Fermentation |
Subjects: | |
Online Access: | https://www.mdpi.com/2311-5637/7/2/70 |
id |
doaj-470ba80d0a74423887304cbcb2dcc79b |
---|---|
record_format |
Article |
spelling |
doaj-470ba80d0a74423887304cbcb2dcc79b2021-04-30T23:04:14ZengMDPI AGFermentation2311-56372021-04-017707010.3390/fermentation7020070Valorization of Rice Husk for the Production of Porous Biochar MaterialsWen-Tien Tsai0Yu-Quan Lin1Hung-Ju Huang2Graduate Institute of Bioresources, National Pingtung University of Science and Technology, Pingtung 912, TaiwanGraduate Institute of Bioresources, National Pingtung University of Science and Technology, Pingtung 912, TaiwanGeneral Research Service Center, National Pingtung University of Science and Technology, Pingtung 912, TaiwanRice husk (RH) is one of the most important crop residues around the world, making its valorization an urgent and important topic in recent years. This work focused on the production of RH-based biochars at different pyrolysis temperatures from 400 to 900 °C and holding times from 0 to 90 min. Furthermore, the variations in the yields and pore properties of the resulting biochars were related to these process conditions. The results showed that the pore properties (i.e., BET surface area and porosity) of the resulting RH-based biochar were positively correlated with the ranges of pyrolysis temperature and holding time studied. The maximal pore properties with a BET surface area of around 280 m<sup>2</sup>/g and porosity of 0.316 can be obtained from the conditions at 900 °C for a holding time of 90 min. According to the data on the nitrogen (N<sub>2</sub>) adsorption–desorption isotherms and pore size distributions, both microporous and mesoporous structures exist in the resulting biochar. In addition, the EDS and FTIR analyses also supported the slight hydrophilicity on the surface of the RH-based biochar due to the oxygen/silica-containing functional groups. Based on the findings of this work, the RH-based biochar could be used as a material in environmental applications for water conservation, wastewater treatment and soil amendment.https://www.mdpi.com/2311-5637/7/2/70rice huskpyrolysisporous biocharpore propertysurface composition |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Wen-Tien Tsai Yu-Quan Lin Hung-Ju Huang |
spellingShingle |
Wen-Tien Tsai Yu-Quan Lin Hung-Ju Huang Valorization of Rice Husk for the Production of Porous Biochar Materials Fermentation rice husk pyrolysis porous biochar pore property surface composition |
author_facet |
Wen-Tien Tsai Yu-Quan Lin Hung-Ju Huang |
author_sort |
Wen-Tien Tsai |
title |
Valorization of Rice Husk for the Production of Porous Biochar Materials |
title_short |
Valorization of Rice Husk for the Production of Porous Biochar Materials |
title_full |
Valorization of Rice Husk for the Production of Porous Biochar Materials |
title_fullStr |
Valorization of Rice Husk for the Production of Porous Biochar Materials |
title_full_unstemmed |
Valorization of Rice Husk for the Production of Porous Biochar Materials |
title_sort |
valorization of rice husk for the production of porous biochar materials |
publisher |
MDPI AG |
series |
Fermentation |
issn |
2311-5637 |
publishDate |
2021-04-01 |
description |
Rice husk (RH) is one of the most important crop residues around the world, making its valorization an urgent and important topic in recent years. This work focused on the production of RH-based biochars at different pyrolysis temperatures from 400 to 900 °C and holding times from 0 to 90 min. Furthermore, the variations in the yields and pore properties of the resulting biochars were related to these process conditions. The results showed that the pore properties (i.e., BET surface area and porosity) of the resulting RH-based biochar were positively correlated with the ranges of pyrolysis temperature and holding time studied. The maximal pore properties with a BET surface area of around 280 m<sup>2</sup>/g and porosity of 0.316 can be obtained from the conditions at 900 °C for a holding time of 90 min. According to the data on the nitrogen (N<sub>2</sub>) adsorption–desorption isotherms and pore size distributions, both microporous and mesoporous structures exist in the resulting biochar. In addition, the EDS and FTIR analyses also supported the slight hydrophilicity on the surface of the RH-based biochar due to the oxygen/silica-containing functional groups. Based on the findings of this work, the RH-based biochar could be used as a material in environmental applications for water conservation, wastewater treatment and soil amendment. |
topic |
rice husk pyrolysis porous biochar pore property surface composition |
url |
https://www.mdpi.com/2311-5637/7/2/70 |
work_keys_str_mv |
AT wentientsai valorizationofricehuskfortheproductionofporousbiocharmaterials AT yuquanlin valorizationofricehuskfortheproductionofporousbiocharmaterials AT hungjuhuang valorizationofricehuskfortheproductionofporousbiocharmaterials |
_version_ |
1721497135686352896 |