Investigation on synergistic characteristics of sludge and lignite during co-hydrothermal carbonization

被引：0
|
作者：
Song Y. [1 ,3 ]
Zhuang X. [1 ,3 ]
Zhan H. [2 ,3 ]
Wang N. [1 ,3 ]
Yin X. [1 ]
Wu C. [1 ,3 ]
机构：
[1] Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, Guangdong
[2] Guangdong Key Laboratory of Environmental Protection and Resource Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, Guangdong
[3] University of Chinese Academy of Sciences, Beijing
来源：
Huagong Xuebao/CIESC Journal | 2019年 / 70卷 / 08期
关键词：
Co-hydrothermal carbonization; Lignite; Products characterization; Sludge; Synergistic effects;
D O I：
10.11949/0438-1157.20190072
中图分类号：
学科分类号：
摘要：
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. © All Right Reserved.
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页码：3132 / 3141
页数：9
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