轧钢油泥与聚丙烯共热解特性及产物分布

为探寻轧钢油泥与聚丙烯高质化利用的途径，采用热重分析仪和管式热解炉，研究了轧钢油泥与聚丙烯不同混合比例下的共热解行为及热解产物分布特性。结果表明：轧钢油泥与聚丙烯共热解过程中存在协同交互作用。随着聚丙烯掺混质量分数的增大，混合样品的活化能先减小后增大，但远低于两者线性叠加得到的理论计算值。此外，随着聚丙烯掺混质量分数的增大，一方面会减少气相和固相产物产率，增大液相产物产率；另一方面也会降低液相产物中重质组分和含氧组分的相对含量。当聚丙烯掺混质量分数为0.75时，相比于理论计算值，液相产物中C₂₀~C₃₀组分和含氧类组分相对含量实验值分别降低了9.68百分点和8.60百分点；同时聚丙烯的掺混促进了轧钢油泥中羰基的裂解，使CO和CO₂产率实验值分别提高了7.18和4.86 mL/g。

Co-Pyrolysis Characteristics and Product Distribution of Mixed Steel Rolling Oil Sludge and Polypropylene

In order to explore a highly efficient utilization of mixed steel rolling oil sludge and polypropylene, thermogravimetric analyzer and tubular pyrolyzer were employed to investigate the co-pyrolysis behaviors and the pyrolysis product distribution characteristics at different mixing ratios of these two substances. Results indicated that some interactions between rolling oil sludge and polypropylene occured during the co-pyrolysis process. With increasing mass fraction of polypropylene, activation energy of the mixed samples firstly decreased, and then increased, and its value was much lower than the theoretical calculation result of linear superpostion. Besides, as the mass fraction of polypropylene in the mixture increased,on one hand, yields of gas and solid phase products decreased, whereas that of liquid phase product increased. On the other hand, relative contents of heavy components and oxygen-containing components in liquid phase products were reduced. When the mass fraction of polypropylene was 0.75, compared with the theoretical calculation values, the relative contents of C₂₀—C₃₀ components and oxygen-containing components in the liquid phase product in the experiment were respectively reduced by 9.68 percentage and 8.60 percentage. Furthermore, the addition of polypropylene facilitated the cracking of carbonyl group in the steel rolling oil sludge, resulting in an increase of 7.18 and 4.86 mL/g in the yield of CO and CO₂ in the experiment.