BioResources | 卷:11 |
Effects of Temperature and Heating Rate on the Characteristics of Molded Bio-char | |
Ji-Lei Liu1  Huan-Bin Xu1  Hui-Li Liu1  Hua Wang2  Jian-Hang Hu2  Li-Fu Jin2  Ang Li2  | |
[1] China; | |
[2] Kunming University of Science and Technology; | |
关键词: Bio-char; Biomass; Physicochemical; Morphological; | |
DOI : 10.15376/biores.11.2.3259-3274 | |
来源: DOAJ |
【 摘 要 】
A slow pyrolysis of pinewood was investigated in this paper. Through the briquette process, the pinewood sawdust becomes molded biomass. The molded bio-char was produced from molded biomass with different pyrolysis factors, and the bio-char’s heating value, char yield rates, and physicochemical and morphological properties were investigated. Molded bio-char’s characteristics depended principally on pyrolysis factors. At low temperature (400 °C), the char yield rate was positively correlated to the heating rate. But at higher temperatures (500 to 700 °C), the char yield rates decreased as heating rates increased. As pyrolysis temperature increased from 400 to 700 °C, the following increased in molded bio-char: fixed-carbon content, percentage carbon, heating value, ash content, as well as surface areas. And its pore structure, graphite degree, and polymerization degree achieved a higher level. Compared with pulverized bio-char, the molded bio-char had a higher char yield rate, ash content, graphite degree, and structure ordering. The molded bio-char obtained from a low temperature (400 °C) and high heating rate (15 °C/min) can be used as a reducing agent, the molded bio-char from 600 °C is recommend as an activated carbon precursor, and the molded bio-chars from low temperature (400 °C) have a higher efficiency as fuel.
【 授权许可】
Unknown