Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
College of Chemical Engineering and Material Science, Zaozhuang University, Zaozhuang, Shandong Province 277160, China.
Bioresour Technol. 2019 Jun;282:133-141. doi: 10.1016/j.biortech.2019.03.007. Epub 2019 Mar 4.
The thermal behavior of the hydrochars from co-hydrothermal carbonization (co-HTC) of sawdust (SD) and sewage sludge (SS) was investigated using thermogravimetric analysis. The comprehensive devolatilization index indicated that the devolatilization performance of SS was decreased by HTC, while it was significantly improved 7.38-23.69 times by co-HTC. The kinetic analysis showed that HTC of SS decreased the average activation energy from 308.96 and 314.78 kJ mol to 220.86 and 221.27 kJ mol by Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS), respectively, while it was increased from 182.37 to 207.06 kJ mol and from 181.06 to 207.05 kJ mol with the increasing proportion of SD from 25% to 75% during co-HTC, respectively. The thermodynamic parameters revealed that pyrolysis reactivity of the hydrochar derived from SD was improved by co-HTC of SD and SS. Kinetic and thermodynamic findings were useful for the design of pyrolysis process using hydrochar as solid fuel.
采用热重分析研究了木屑（SD）和污水污泥（SS）共水热碳化（co-HT）水热炭的热行为。综合挥发分指数表明，HTC 降低了 SS 的挥发分性能，而 co-HTC 则将其显著提高了 7.38-23.69 倍。动力学分析表明，HTC 通过 Flynn-Wall-Ozawa（FWO）和 Kissinger-Akahira-Sunose（KAS）分别将 SS 的平均活化能从 308.96 和 314.78 kJ/mol 降低到 220.86 和 221.27 kJ/mol，而在 co-HTC 过程中，随着 SD 比例从 25%增加到 75%，其分别增加到 207.06 和 207.05 kJ/mol。热力学参数表明，SD 与 SS 的共水热碳化提高了源自 SD 的水热炭的热解反应性。动力学和热力学的研究结果有助于设计以水热炭为固体燃料的热解工艺。
