SONG Yanpei, ZHUANG Xiuzheng, ZHAN Hao, WANG Nantao, YIN Xiuli, WU Chuangzhi. Investigation on synergistic characteristics of sludge and lignite during co-hydrothermal carbonization[J]. CIESC Journal, 2019, 70(8): 3132-3141
SONG Yanpei, ZHUANG Xiuzheng, ZHAN Hao, WANG Nantao, YIN Xiuli, WU Chuangzhi. Investigation on synergistic characteristics of sludge and lignite during co-hydrothermal carbonization[J]. CIESC Journal, 2019, 70(8): 3132-3141DOI: 10.11949/0438-1157.20190072.
Investigation on synergistic characteristics of sludge and lignite during co-hydrothermal carbonization
The resource utilization of sludge has always been the focus of research by scholars. And their conversion into high quality solid fuels (hydrochars)
via
hydrothermal carbonization (HTC) is proved to be a promising potential technology. In this work
Co-HTC of sludge (sewage sludge
SS; deinking sludge
DS) and lignite (LC) was investigated to obtain a better preparation technology of sludge-derived hydrochars. The synergetic effect of mixing ratio (3∶7
5∶5
7∶3) on the HTC upgrading of sludge/LC mixtures was explored. And the combustion performance of hydrochars was also analyzed. The results have demonstrated that sludge/LC mixtures at a mixing ratio of 5∶5 have exhibited an optimal performance of hydrochar products. Specifically
the hydrochar yields can reach up to 81.08% and 86.00% for LC/SS and LC/DS
respectively. And high synergistic coefficients are observed in hydrochar yield (LC/SS-1.69%
LC/DS-0.18%)
organics retention (LC/SS-11.90%
LC/DS-2.64%) and carbon retention (LC/SS-4.08%
LC/DS-0.77%)
indicating a more remarkable synergetic effect of LC/SS than LC/DS. Besides
the higher heating value (HHV) and coalification degree of hydrochars can be enhanced by the increasing proportion of LC
which not only improves the fuel characteristics of hydrochars
but also makes it more stable and sufficient in the combustion process. These findings indicate that higher quality fuels can be obtained by Co-HTC pretreatment
thereby realizing the effective utilization of sludge/lignite.
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references
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Gaseous pollutants emissions from rotary kiln combustion of municipal sewage sludge
Migration of sulfur and nitrogen during co-hydrothermal carbonization process of sewage sludge and high-sulfur coal
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Related Author
SONG Yanpei
ZHUANG Xiuzheng
ZHAN Hao
XU Bin
YIN Xiuli
WU Chuangzhi
CHEN Yuhao
CHEN Xiaoping
Related Institution
State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environmental Protection and Resource Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences
Key Laboratory of Renewable Energy, , Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou
Key Laboratory of Energy Thermal Conversion and Control,Ministry of Education,School of Energy and Environment,Southeast University
Institute of Resources and Environment Engineering, Shanxi University, Engineering Research Center of CO2 Emission Reduction and Resource Utilization-Ministry of Education of the People’s Republic of China
Hunan Zhongye Changtian Energy Conservation and Environmental Protection Company Limited