A deashed oil shale (OSA) was treated using low-temperature pyrolysis treatment (LTPT) to modify its caking index (G). The treated OSA was characterized by Fourier transform infrared spectrometry, solid-state ¹³C nuclear magnetic resonance (¹³C NMR) spectrometry, and Raman spectrometry to shed light on the mechanism of G improvement. Furthermore, one industrial coal blend and the pyrolyzed OSA with a high G (OSA400) were used to perform crucible coking experiments. The coke reactivity (CR) and coke strength after reaction (CSR) indices, thermogravimetric and derivative thermogravimetric curves, pore volumes, and Raman spectra of the resulting cokes were analyzed. The results showed that LTPT significantly increased the G of OSA but there was no benefit in going above 400 °C. the G was modified because of the generation of caking components, the characteristics of which are of medium-sized molecules with suitable molecular structures (e.g., bridge bonds, chain lengths, and functional groups), caused by LTPT. Additionally, the changes in CR and CSR indices between the cokes obtained from the blends with and without OSA400 were within 2.0%, which is acceptable.

使用低温热解处理 (LTPT) 处理脱灰油页岩 (OSA) 以修改其粘结指数 ( G )。通过傅里叶变换红外光谱、固态¹³ C 核磁共振 ( ¹³ C NMR) 光谱和拉曼光谱对处理过的 OSA 进行表征，以阐明G改进的机制。此外，一种工业混煤和具有高G的热解 OSA(OSA400) 用于进行坩埚焦化实验。分析了焦炭反应性 (CR) 和反应后焦炭强度 (CSR) 指数、热重曲线和导数热重曲线、孔体积和所得焦炭的拉曼光谱。结果表明，LTPT 显着增加了OSA的G，但在 400°C 以上没有任何好处。所述ģ是因为结块成分的生成的改性，其特征是用合适的分子结构（例如，桥键，链长，和官能团），致LTPT中型分子。此外，由含 OSA400 和不含 OSA400 的共混物获得的焦炭之间的 CR 和 CSR 指数变化在 2.0% 以内，这是可以接受的。