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| Properties of Hydrochars from Different Sources of Biomass Feedstock |
| Received:May 12, 2014 |
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| KeyWord:sawdust;wheat straw;corn stalk;hydrochar;property |
| Author Name | Affiliation | E-mail | | SUN Ke-jing | College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China | | | ZHANG Hai-rong | College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China | | | TANG Jing-chun | College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
Key Laboratory of Pollution Processes and Environmental Criteria(Ministry of Education), Tianjin 300071, China
Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Tianjin 300071, China | tangjch@nankai.edu.cn |
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| Abstract: |
| Hydrothermal carbonization is a thermochemical process converting biomass into a coal-like material called hydrochar under biomass/water suspension conditions. Three hydrochars were prepared by hydrothermal carbonization(HTC) from three different feedstock sources of sawdust(SD), wheat straw(WS) and corn stalk(CS). Their characteristics including outputs, elemental contents, surface properties, PAHs concentrations and surface functional groups were investigated. Results showed that hydrochar from SD(H-SD) had the highest outputs(54.66%), and C content(52.59%), while O content was the lowest(41.56%). The SEM results showed that H-SD had smooth surface and neatly-arranged porous structure, whereas WS hydrochar(H-WS) was platy particles with rough surface while CS hydrochar(H-CS) did not have obvious pore structure. Hydrothermal carbonization did not change the types of functional groups but increased the contents of organic functional groups while decreased mineral components(such as SiO2) in H-WS. However, both organic functional groups and mineral components significantly increased in H-SD. The PAHs concentrations of hydrochars were in order:H-WS > H-SD > H-CS, with phenanthrene and naphthalene being major components. |
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