Abstract The co-pyrolysis of hydrolysis lignin and low rank coal was studied in a drop-tube fixed bed reactor. Baganuur (BN) coal blending into hydrolysis lignin with mass ratio of 50:50 decreased the yields of oil and gas significantly, and then increased the yield of char compared to their predicted values after the co-pyrolysis at 450 °C. This toxic effect was explained by the easier coupling reaction of BN coal derived poly-aromatic radicals with hydrolysis lignin (HL)-derived aromatic compounds to form solid product - char. However, when the amount of BN coal in the blend decreased from 50% to 30%, the toxic effect decreased, and experimental yields of char, oil and gas approached to their predicted values. In case of HL-AC (50:50) blend, a synergistic effect was observed during the co-pyrolysis of hydrolysis lignin and Aduunchuluun (AC) coal. The oil yield slightly increased, and the yields of gas and char decreased compared to their predicted values after the co-pyrolysis at 450 °C. Amount of aromatic hydrocarbons in acetone soluble of the oil was close to its predicted value, and several kinds of aliphatic alcohols, aldehydes and ketones were detected in toluene soluble of the oil product, even though there were no such compounds existed in the toluene soluble from the pyrolysis of single feed-AC coal. It was supposed that additional hydrogen was produced by the secondary water-gas shift reaction of CO gas evolved from AC coal with large amount of inherent alkali and alkali earth metals during the HL-AC co-pyrolysis. It was also supported by the larger H/C ratios of oil and char compared to their predicted values after the co-pyrolysis of HL-AC blend.

中文翻译：

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木质素和低阶煤共热解生产芳香油

摘要 在滴管固定床反应器中研究了水解木质素与低阶煤的共热解。Baganuur (BN) 煤以 50:50 的质量比掺入水解木质素中，显着降低了油气产率，然后在 450 °C 共热解后与预测值相比提高了炭产率。这种毒性作用可以通过 BN 煤衍生的多芳基与水解木质素 (HL) 衍生的芳族化合物更容易的偶联反应来解释，以形成固体产物 - 炭。然而，当掺​​混物中BN煤的量从50%减少到30%时，毒性作用降低，炭、油和气的实验产率接近其预测值。在 HL-AC (50:50) 混合物的情况下，在水解木质素和 Aduunchuluun (AC) 煤的共热解过程中观察到协同效应。在 450 °C 共热解后，油产量略有增加，气体和炭的产量与其预测值相比有所下降。油品丙酮溶物中芳烃含量接近预测值，油品甲苯溶物中检出多种脂肪醇、醛和酮，尽管甲苯可溶物中不存在此类化合物。单一进料-AC煤的热解。据推测，在HL-AC共热解过程中，AC煤放出的CO气体与大量固有碱金属和碱土金属发生二次水煤气变换反应，产生了额外的氢气。与 HL-AC 共混物共热解后的预测值相比，油和炭的更大 H/C 比也支持了这一点。