Citation: DAI Cai-sheng, LIU Xue-peng, DAI Jin-ze, MA Song-jiang. Preparation and rheological property of the char-water slurry based on co-pyrolysis of sawdust and lignite[J]. Journal of Fuel Chemistry and Technology, ;2016, 44(7): 784-791. shu

Preparation and rheological property of the char-water slurry based on co-pyrolysis of sawdust and lignite

1.
School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
2.
School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China

Corresponding author: LIU Xue-peng, 502006383@qq.com
Received Date: 20 January 2016
Revised Date: 18 April 2016

Fund Project: Scientific Innovation Program of Graduates in Hunan Province CX2014B419The project was supported by the National Natural Science Foundation of China 51478182International S & T Cooperation Program of China 2013DFG60060

Figures(10)

An integrated experimental apparatus for pyrolysis/co-pyrolysis was employed to carry out the upgrading process of sawdust, Yunnan lignite, and their blends. The slurry-ability of the upgraded char was investigated. The results show that the slurry-ability of sawdust and Yunnan lignite is significantly improved via pyrolysis process. Bio-char and semi-coke were prepared at 500 ℃ holding 1.5 h. The solid loadings of the resulting slurry fuels derived from sawdust and lignite were enhanced from 29.21% and 54.63% to 38.57% and 60.19%, respectively. Under the same pyrolysis conditions, the slurry-ability of the char prepared from co-pyrolysis of sawdust and Yunnan lignite is apparently superior to that of the corresponding bio-char/coal char mixture with the same original mass ratio of feedstock. The prepared char-water slurries generally display pseudo-plastic behavior, i.e., the shear press decreases with increasing shear rate. When the mass ratio of sawdust exceeds 50%, the rheological property of char-water slurry tend to be shear thickening, exhibiting strong dilatant behavior at low shear rate, which is similar to the rheological property of biochar-water slurry. The desirable slurry-ability of the char produced from co-pyrolysis could be attributed to the synergistic effect of biomass and coal, which is likely to improve aromaticity of the resulting hybrid char.
- sawdust,
- lignite,
- co-prolysis,
- bio-char water slurry,
- rheological property
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沈阳化工大学材料科学与工程学院沈阳 110142