Study on the thermal liquefaction of Xilinguole lignite in solvent at high temperature
Study on the thermal liquefaction of Xilinguole lignite in solvent at high temperature
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锡林郭勒褐煤高温溶剂热液化研究
DOI：
10.1016/j.fuproc.2018.03.025
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发表时间：
2018-07
影响因子：
7.5
通讯作者：
Wang ZC
中科院分区：
文献类型：
--
作者：
Wang Zhicai;Li Lei;Hu Runan;Wang Xiaoling;Pan Chunxiu;Kang Shigang;Ren Shibiao;Lei Zhiping;Shui Hengfu;Wang ZC
本文研究了锡林郭勒褐煤在甲苯、四氢萘及其混合溶剂中于400-540 °C的热液化反应。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%。在甲苯溶剂中，热释光主要以热解自由基的缩合为主，而在510 °C以下的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THN含量的增加而增加。甲苯裂解产物主要为油气（O + G）馏分，而THN裂解产物中以沥青质（AS）和前沥青质（PA）为主。供氢溶剂对热释光过程中的脱氧有明显的改善作用。因此，供氢溶剂中的TL由于反应压力低且不使用H2和催化剂，是一种潜在的XL转化技术。
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 H2and catalyst used.
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