Abstract This paper studied influences of temperature and additives on sewage sludge (SS) pyrolysis in a fluidized bed. The maximum condensate yield (17.07 wt%) was observed with Ca-bentonite at 650 °C. The yields of non-condensable gases rose significantly with addition of catalysts (e.g. kaolin). Fourier transform infra-red (FTIR) spectra indicated catalysts led to the appearance of some compounds (e.g. alkanes, ketones, amines) in the pyrolysis oil (PO). Gas chromatography mass spectrometry (GC-MS) revealed that PO mainly contained organo-oxygen species, nitrogen-containing heterocyclic compounds, hydrocarbons and antibiotics. With catalysts addition, the main components in the organo-oxygen species were phenols (1.59%–13.78%) and ketones (1.15%–5.12%). The highest CO2 and CO yields were obtained with kaolin addition, while the lowest CO2 yield was reached by CaO. Nitrogen (N) and chlorine (Cl) mainly existed in char and liquid phase, whereas sulfur (S) was dominated in char, indicating that the existence form of S was stable. CaO had certain N retention ability and S retention capability was up to 99.64%. Ca-bentonite and CaO reduced the release of Cl and all catalysts contributed to reduction of HCN emission.

中文翻译：

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台式流化床反应器中污水污泥的热解：冷凝物和不凝气体的特性

摘要 本文研究了温度和添加剂对流化床中污水污泥(SS)热解的影响。在 650 °C 下使用 Ca-膨润土观察到最大冷凝物产率 (17.07 wt%)。随着催化剂（例如高岭土）的加入，不凝性气体的产率显着增加。傅里叶变换红外 (FTIR) 光谱表明催化剂导致热解油 (PO) 中出现一些化合物（例如烷烃、酮、胺）。气相色谱质谱(GC-MS) 显示PO 主要包含有机氧物种、含氮杂环化合物、碳氢化合物和抗生素。添加催化剂后，有机氧物种的主要成分是酚类（1.59%–13.78%）和酮类（1.15%–5.12%）。添加高岭土获得最高的 CO2 和 CO 产率，而 CaO 达到最低的 CO2 产量。氮（N）和氯（Cl）主要存在于炭和液相中，而硫（S）主要存在于炭中，说明S的存在形式是稳定的。CaO具有一定的N截留能力，S截留率高达99.64%。Ca-膨润土和CaO 减少了Cl 的释放，所有催化剂都有助于减少HCN 的排放。