Song Qiang, Zhao Hong-Yu, Xing Wen-Long, Song Li-Hua, Yang Li, Yang Di, Shu Xinqian
School of Chemical and Environmental Engineering, China University of Mining & Technology (Beijing), 100083 Beijing, China.
School of Civil and Resource Engineering, University of Science and Technology Beijing, 10083 Beijing, China.
Waste Manag. 2018 Aug;78:621-629. doi: 10.1016/j.wasman.2018.06.033. Epub 2018 Jun 23.
Additives can have a significant impact on the pyrolysis process. The effects of three additives (CaO, MSW char and biomass) on the pyrolysis characteristics of municipal solid waste (MSW) were investigated using a fixed-bed reactor. In addition, the effects of additives and temperature on the MSW pyrolysis product yield, the composition of MSW pyrolysis gases, and the composition of MSW pyrolysis tar were investigated using fixed bed reactor, GC-MS and FTIR, respectively. The results showed that the maximum tar yield of the MSW reached 28.73% at 600 °C and the tar yield decreased with increasing amounts of CaO and MSW. The tar yield began to decrease when the additive amount of CaO was 5% and decreased to 23.05% when the additive amount of MSW char (C) was 30%. Synergistic pyrolysis of the biomass and MSW was observed when the additive amount of the pine increased to 75% (with a tar yield of 37.91%). Regarding gas composition, with increasing additives content, the CO yield decreased, while the CO yield increased. According to the FTIR analysis of the tar, CaO enhanced the condensation of the aromatic rings and converted the aliphatic hydrocarbons, while C reduced the oxygenic groups of the tar. The GC-MS results revealed that the additives decreased the yield of carboxylic acid and ethanol, and increased the ester yield. The additives were also found to have a deoxidation effect that decreased the acid content, potentially improving the quality and stability of the tar.
添加剂对热解过程可能产生重大影响。使用固定床反应器研究了三种添加剂（CaO、城市固体废弃物焦炭和生物质）对城市固体废弃物（MSW）热解特性的影响。此外，分别使用固定床反应器、气相色谱 - 质谱联用仪（GC - MS）和傅里叶变换红外光谱仪（FTIR）研究了添加剂和温度对MSW热解产物产率、MSW热解气体组成以及MSW热解焦油组成的影响。结果表明，MSW的最大焦油产率在600℃时达到28.73%，且焦油产率随CaO和MSW用量的增加而降低。当CaO的添加量为5%时，焦油产率开始下降，当城市固体废弃物焦炭（C）的添加量为30%时，焦油产率降至23.05%。当松木的添加量增加到75%（焦油产率为37.91%）时，观察到生物质与MSW的协同热解。关于气体组成，随着添加剂含量的增加，CO产率降低，而CO₂产率增加。根据对焦油的FTIR分析，CaO增强了芳环的缩合并转化了脂肪烃，而C减少了焦油中的含氧基团。GC - MS结果表明，添加剂降低了羧酸和乙醇的产率，并提高了酯的产率。还发现添加剂具有脱氧作用，降低了酸含量，可能改善了焦油的质量和稳定性。
