State Key Laboratory of Petroleum Pollution Control, Beijing, People's Republic of China.
CNPC Research Institute of Safety and Environmental Technology, Beijing, People's Republic of China.
Environ Technol. 2024 Sep;45(22):4670-4681. doi: 10.1080/09593330.2023.2283057. Epub 2023 Nov 16.
To improve the homogeneity of heating, the magnetic absorbing material FeO is considered to use in microwave pyrolysis of oily sludge. Therefore, the effect of FeO on the microwave pyrolysis of oily sludge is investigated based on gas volatile products. Thermogravimetric mass spectrometry result certifies that FeO will increase the weight-loss ratio from 13.0% to 14.1%. Also, the characteristic peak intensity of CO in gas products decreases from 5.41 × 10 A/g to 1.95 × 10 A/g, while HO increases from 3.57 × 10 A/g to 7.32 × 10 A/g and CO increases from 6.87 × 10 A/g to 8.92 × 10 A/g. This is caused by the esterification of alcohols and esters and the reduction of FeO by CO. Based on the decrease in activation energy and enthalpy values of Stage II and IV, it infers that FeO catalyzes the pyrolysis process of oily sludge to some extent. Similarly, gas chromatography-mass spectrometry results show that FeO can make the types of gas products increase. Especially, the number of molecular species increases from 5 to 46 under 200-300 °C. Finally, a simple molecular dynamics simulation model is conducted, and the results are in agreement with the experimental results. This study shows that FeO improves the pyrolysis homogeneity and the pyrolysis efficiency also improves.
为了提高加热的均一性，考虑在微波热解含油污泥中使用磁性吸收材料 FeO。因此，基于气体挥发产物研究了 FeO 对含油污泥微波热解的影响。热重质谱结果证明，FeO 将失重率从 13.0%提高到 14.1%。此外，气体产物中 CO 的特征峰强度从 5.41×10 A/g 降低到 1.95×10 A/g，而 HO 从 3.57×10 A/g 增加到 7.32×10 A/g，CO 从 6.87×10 A/g 增加到 8.92×10 A/g。这是由于醇和酯的酯化以及 CO 还原 FeO 所致。基于第二阶段和第四阶段的活化能和焓值的降低，可以推断出 FeO 在一定程度上催化了含油污泥的热解过程。同样，气相色谱-质谱结果表明，FeO 可以增加气体产物的种类。特别是，在 200-300°C 下，分子种类的数量从 5 增加到 46。最后，进行了简单的分子动力学模拟模型，结果与实验结果一致。本研究表明，FeO 提高了热解的均一性，也提高了热解效率。
