Abstract In this paper, thermal liquefaction (TL) of Xilinguole lignite (XL) in the range of 400–540 °C have been carried out in toluene, tetralin (THN) and their mixed solvent, respectively. Results indicated that the conversion of XL primarily depends on the hydrogen donor ability of solvent. The highest conversions of XL in toluene and THN were obtained at 480 °C, which are 25.8% and 98.6%, respectively. The condensation of pyrolytic free radicals dominates the TL in toluene solvent but there is hardly obvious coking occurred in THN at below 510 °C. In toluene and THN mixed solvent, the conversion of XL increases with the THN content. The products of TL in toluene mainly consist of oil and gas (O + G) fraction, but the asphaltene (AS) and preasphaltene (PA) factions prevail in the products of TL in THN. Hydrogen donor solvent has obvious improvement on the deoxygenation in the TL process. Therefore, TL in hydrogen donor solvent is a potential conversion technology of XL due to low reaction pressure and without H2 and catalyst used.

中文翻译：

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锡林郭勒褐煤在溶剂中高温热液化的研究

摘要 本文分别在甲苯、四氢化萘(THN)及其混合溶剂中对锡林郭勒褐煤(XL)在400-540 °C范围内进行热液化(TL)。结果表明XL的转化率主要取决于溶剂的供氢能力。XL 在甲苯和 THN 中的最高转化率在 480 °C 下获得，分别为 25.8% 和 98.6%。热解自由基的缩合在甲苯溶剂中占主导地位，但在低于 510 °C 的 THN 中几乎没有明显的焦化发生。在甲苯和THN混合溶剂中，XL的转化率随着THN含量的增加而增加。TL在甲苯中的产物主要由油气（O+G）馏分组成，但在THN中TL的产物中以沥青质（AS）和预沥青质（PA）组分为主。供氢溶剂对TL过程中的脱氧有明显的改善。因此，由于反应压力低且不使用氢气和催化剂，在供氢溶剂中的 TL 是 XL 的潜在转化技术。