CAS Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, People's Republic of China.
CAS Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, People's Republic of China.
Environ Res. 2023 Dec 1;238(Pt 2):117271. doi: 10.1016/j.envres.2023.117271. Epub 2023 Oct 2.
Co-pyrolysis of sewage sludge (SS) and tobacco stalk (TS) was conducted, where TS are rich in inorganic elements. The effects of the mixing ratio and pyrolysis temperature on pyrolysis products were investigated through the tube furnace system. The components of gas and tar were determined. In addition, the N/S ratio, pore distribution characteristics, surface functional group characteristics, aromatisation characteristics and inorganic element content of char were studied. Results show that the addition of TS to SS has a significant synergistic effect. Particularly, when the ratio of SS to TS is 1:3, the pyrolysis gas yield is the largest. The inorganic elements with a catalytic effect can promote the conversion of char and tar into pyrolysis gas. However, with the increase in pyrolysis temperature, the synergistic effect will gradually weaken. The increase in pyrolysis temperature will promote the development of mesopores in char but will reduce the order degree of the char structure. The addition of TS in SS will further increase the number of mesopores in char, and the obtained char carbon structure is more ordered. When the pyrolysis temperature is 600 °C, the tar yield is the highest, and the higher the mixing ratio of SS, the better the formation of polyaromatic compounds and aliphatic hydrocarbons.
对污水污泥（SS）和烟草秸秆（TS）进行共热解，其中 TS 富含无机元素。通过管式炉系统研究了混合比和热解温度对热解产物的影响。确定了气体和焦油的成分。此外，还研究了焦的 N/S 比、孔分布特性、表面官能团特性、芳构化特性和无机元素含量。结果表明，TS 对 SS 的添加具有显著的协同作用。特别是当 SS 与 TS 的比例为 1:3 时，热解气产率最大。具有催化作用的无机元素可以促进 char 和焦油向热解气的转化。然而，随着热解温度的升高，协同效应会逐渐减弱。热解温度的升高会促进 char 中中孔的发展，但会降低 char 结构的有序度。在 SS 中添加 TS 会进一步增加 char 中的中孔数量，得到的 char 碳结构更有序。当热解温度为 600°C 时，焦油产率最高，且 SS 混合比越高，有利于多环芳烃和脂肪烃的形成。
