College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China; State Key Laboratory of Petroleum Pollution Control, Beijing, 102206, PR China.
College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China.
Environ Pollut. 2020 May;260:114067. doi: 10.1016/j.envpol.2020.114067. Epub 2020 Jan 24.
To understand the effect of reaction temperature on sulfur during hydrothermal carbonization (HTC) of sewage sludge (SS), seven group of temperature (180-300 °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.
为了了解反应温度对污水污泥（SS）水热碳化（HTC）过程中硫的影响，选择了七组温度（180-300°C）来研究含硫化合物在水热炭和液体产物中的分布和演变。采用元素分析、X 射线光电子能谱（XPS）和 X 射线粉末衍射（XRD）对水热炭中硫的分布进行了表征。在液体样品中测定了硫酸根离子和硫化物的浓度。实验结果表明，随着温度的升高，由于 SS 的碳化程度提高，O/C 比降低。水热碳化后，SS 中 90%的硫仍留在水热炭中。随着温度的升高，液体中硫的含量（主要以硫酸根离子的形式存在）趋于减少。然而，气相的实验结果与液相相反。
