Article
Energy & Fuels
Lei Zhang, Zhuozhi Wang, Jiao Ma, Wenwen Kong, Peng Yuan, Rui Sun, Boxiong Shen
Summary: The research demonstrates that torrefaction performed in flue gas atmosphere at 573 K for 30 min is the optimal condition for upgrading rice husk, and using flue gas as the carrier gas for biomass torrefaction is more effective and economical compared to N2 and air, resulting in improved fuel quality of rice husk.
Article
Energy & Fuels
Chengxin Wang, Haobo Bi, Qizhao Lin, Chunlong Jiang, Xuedan Jiang, Kesheng Meng
Summary: This study evaluated the co-combustion of sewage sludge and rice husk using TG-FTIR, showing improved combustion behavior with increasing rice husk blending ratio and minimum activation energy at 30% blending. Analysis of gaseous products and functional groups revealed CO2 as the predominant volatile with increasing rice husk blending ratio.
BIOENERGY RESEARCH
(2021)
Article
Energy & Fuels
Zhuozhi Wang, Kai Xie, Wenkun Zhu, Lei Zhang, Zhong Zhao, Lianfei Xu, Jiancheng Yang, Boxiong Shen
Summary: This study investigated the effects of torrefaction conditions on the fuel qualities and combustion characteristics of rice husk. The results showed that increasing torrefaction severity had an impact on the fuel qualities and combustion characteristics, with the upgraded sample derived from torrefaction occurring in wet flue gas at 543 K exhibiting the best fuel quality.
Article
Chemistry, Multidisciplinary
Jielong Wu, Liangcai Wang, Huanhuan Ma, Jianbin Zhou
Summary: This study investigated the pyrolysis behavior of pine cone cellulose and lignin, revealing that carbon element was mainly retained in biochar, while oxygen element migrated into liquid and gaseous products. Moreover, a significant portion of nitrogen element was found to migrate into biochar during the pyrolysis process.
Article
Biotechnology & Applied Microbiology
Chuanshuai Chen, Boyu Qu, Wenxiang Wang, Weijian Wang, Guozhao Ji, Aimin Li
Summary: Torrefaction is an effective pretreatment process for biomass, which can enhance energy density and reduce moisture and oxygen contents. The study showed that increasing torrefaction temperature decreased hemicellulose and cellulose contents, while the activation energy increased with torrefaction temperature.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Review
Green & Sustainable Science & Technology
Ahmed Imtiaz Anando, M. Monjurul Ehsan, Md Rezwanul Karim, Arafat A. Bhuiyan, Md Ahiduzzaman, Azharul Karim
Summary: The depletion of non-renewable or fossil energy resources at an alarming rate has been pushing us towards green energy. Considering the current energy crisis, renewable resources are the only viable option to meet the energy demand of a growing global population and industry. Rice husk, with its low energy and bulk density, requires thermochemical pretreatment technologies to improve its fuel characteristics. This paper provides a comprehensive review of different pretreatments of rice husk, including gasification, torrefaction, pyrolysis, and hydrothermal carbonization. These technologies successfully enhance the fuel characteristics, such as heating value and moisture content. The comparison of energy extraction from rice husk using different technologies indicates that wet torrefaction before pyrolysis yields the highest power output.
Article
Energy & Fuels
Zhihao Wang, Qi Wang, Xingwei Yang, Shengpeng Xia, Anqing Zheng, Kuo Zeng, Zengli Zhao, Haibin Li, Szymon Sobek, Sebastian Werle
Summary: Four representative pretreatment methods were used to alter eucalyptus compositions and study their effects on pyrolysis behaviors, kinetics, and product yields. All four pretreatment methods significantly decreased the AAEM contents of eucalyptus, with DH and MOP removing hemicellulose or lignin fractions. The activation energy for hemicellulose pyrolysis was reduced by WW, AW, and DH, while all four methods improved cellulose pyrolysis activation energy. Additionally, the formation of certain pyrolysis products was suppressed, and the levoglucosan yield was increased by all four pretreatment methods.
Article
Energy & Fuels
Rabin Nepal, Hyeok Jin Kim, Jeeban Poudel, Sea Cheon Oh
Summary: Excessive use of fossil fuels has had a significant impact on global warming and the energy crisis, necessitating the promotion and development of alternative energy sources. Converting waste biomass into energy is important for solid waste management. This study improves the fuel properties of spent coffee grounds (SCG) through torrefaction and identifies the optimal conditions for this process.
Article
Thermodynamics
Beibei Yan, Liguo Jiao, Jian Li, Xiaochao Zhu, Sarwaich Ahmed, Guanyi Chen
Summary: This study compared the effectiveness of microwave torrefaction (MT) and conventional torrefaction (CT) on herb residue (HR), showing that MT is more efficient in removing bound water and generating gases. Moisture content was identified as the key factor affecting torrefaction and energy consumption, while MT-HR exhibited superior gasification performance.
Article
Environmental Sciences
Chuanshuai Chen, Ruili Yang, Xuexue Wang, Boyu Qu, Menglu Zhang, Guozhao Ji, Aimin Li
Summary: This study investigated the influence of torrefaction temperature on biomass and evaluated the quality of pellets. Results showed that 250 degrees C was the optimal torrefaction temperature for rice straw and rice husk, and the in-situ torrefied densified pellets had higher quality compared to raw pellets and ex-situ torrefied densified pellets. Additionally, the bonding mechanism was studied, revealing that in-situ torrefaction and densification facilitated the formation of self-locking and lignin migration between particles.
Article
Chemistry, Analytical
Olivia Paniz Fleig, Lucas Manique Raymundo, Luciane Ferreira Trierweiler, Jorge Otavio Trierweiler
Summary: In southern Brazil, rice husk is a common biomass resource, and the influence of torrefaction on the properties of pyrolysis products was studied. It was found that samples torrefied and pyrolyzed at 500 degrees Celsius had the highest biochar yield.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Energy & Fuels
Weizi Cai, Xin Tong, Xiaomin Yan, Hualing Li, Yuzhi Li, Xinyu Gao, Yanning Guo, Weichuang Wu, Daishuang Fu, Xingkai Huang, Jiang Liu, Hailin Wang
Summary: The study utilized rice husk biochar to power high-efficiency DC-SOFC, demonstrating that the microstructure of the biochar is rough and porous, which effectively enhances the electrical output of the cell. Additionally, using a Boudouard reaction catalyst can further increase the power density of the cell.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Chuanshuai Chen, Guozhao Ji, Lan Mu, Yutao Zhang, Aimin Li
Summary: Torrefaction treatment improves the fuel properties of rice husk and rice straw, but severe torrefaction can decrease the energy recovery of solid products. The study concludes that 250 degrees Celsius is the optimum temperature for converting rice waste into valuable biofuel.
SUSTAINABLE ENERGY & FUELS
(2021)
Article
Chemistry, Physical
Hui Zhao, Bao Mi, Na Li, Teng Wang, Yongjie Xue
Summary: In the co-pyrolysis of reclaimed asphalt binder (RAB) and rice husk (RH), the addition of RH improved the pyrolysis characteristics of RAB. The primary gaseous products during co-pyrolysis were aliphatic hydrocarbons, water, and carbon dioxide, with smaller amounts of aldehydes and alcohols from RH. The average activation energy values for the blends decreased with increasing RH addition.
Article
Thermodynamics
Neeha Brojolall, Dinesh Surroop
Summary: In this study, three locally available biomasses, namely bagasse, corn stalk and leaves (CSL), and coconut shell (CS), were subjected to torrefaction. The optimal torrefaction conditions were determined by varying three parameters: temperature, residence time, and particle sizes. The results showed that the enhancement factor, which is the ratio between the heating value of torrefied biomass and untorrefied biomass, was higher for larger particle sizes. However, considering the mass loss, it was found that the highest energy yield varied for different biomasses under specific torrefaction conditions.
