Effect of temperature on the sulfur fate during hydrothermal carbonization of sewage sludge

被引：77
|
作者：
Wang, Zhexian [1 ,2 ,3 ]
Zhai, Yunbo [1 ,2 ]
Wang, Tengfei [1 ,2 ]
Peng, Chuan [1 ,2 ]
Li, Shanhong [1 ,2 ]
Wang, Bei [1 ,2 ]
Liu, Xiangmin [1 ,2 ]
Li, Caiting [1 ,2 ]
机构：
[1] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China
[2] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China
[3] State Key Lab Petr Pollut Control, Beijing 102206, Peoples R China
来源：
ENVIRONMENTAL POLLUTION | 2020年 / 260卷
基金：
中国国家自然科学基金;
关键词：
Hydrothermal carbonization; Sewage sludge; Sulfur balance; Evolution mechanism; COMBUSTION BEHAVIOR; HYDROCHAR FUEL; PYROLYSIS; NITROGEN; WASTE; TRANSFORMATION; BIOMASS; CONVERSION; MICROWAVE; EMISSION;
D O I：
10.1016/j.envpol.2020.114067
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
To understand the effect of reaction temperature on sulfur during hydrothermal carbonization (HTC) of sewage sludge (SS), seven group of temperature (180-300 degrees C) were chosen to investigate the distributions and evolution of sulfur-containing compounds in hydrochar and the liquid products. Elemental analysis, X-ray photoelectron spectroscopy (XPS), and X-Ray powder diffraction (XRD) were used to characterize the distribution of sulfur in hydrochar. The concentrations of sulfate ions and sulfide were determined in the liquid sample. The experimental results showed that as the temperature increased, the O/C ratio decreased because of the improved carbonization degree of SS. After hydrothermal carbonization, 90% of the sulfur in SS remained in hydrochar. As the temperature increased, the amount of sulfur in the liquid, mainly in the form of sulfate ions, tended to decrease. However, the experimental results for the gas phase were the opposite of the liquid phase. (C) 2020 Elsevier Ltd. All rights reserved.
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页数：7
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