ZHAO Bo, WU Kai, ZHONG Li-peng, WEI Gang, HU Zong-hua, ZHENG Wen-guang, RUAN Hui-feng, YAN Xin-ming, MA Yin, WANG Bo, JIANG Tian-lin, ZHANG Hui-yan. Experimental study on catalytic pyrolysis of lignin under char and ZSM-5 for preparation of aromatics[J]. Journal of Fuel Chemistry and Technology, 2021, 49(3): 303-310. DOI: 10.1016/S1872-5813(21)60015-4
Citation: ZHAO Bo, WU Kai, ZHONG Li-peng, WEI Gang, HU Zong-hua, ZHENG Wen-guang, RUAN Hui-feng, YAN Xin-ming, MA Yin, WANG Bo, JIANG Tian-lin, ZHANG Hui-yan. Experimental study on catalytic pyrolysis of lignin under char and ZSM-5 for preparation of aromatics[J]. Journal of Fuel Chemistry and Technology, 2021, 49(3): 303-310. DOI: 10.1016/S1872-5813(21)60015-4

Experimental study on catalytic pyrolysis of lignin under char and ZSM-5 for preparation of aromatics

  • In order to improve yield of aromatics from catalytic pyrolysis of lignin, alkali lignin was used for rapid pyrolysis experiments under a binary catalysis system of alkali lignin char and ZSM-5. Influence of catalyst ratio and pyrolysis temperature as well as pyrolysis time on aromatics quantity and mechanism of synergistic catalysis of alkali lignin char and ZSM-5 were investigated. The results show that quantity of aromatics has increased from 17 mg/g (without char) to 33 mg/g (with char addition of 1 g), which is about doubled. The optimal conditions for preparation of aromatics are under alkali lignin∶alkali lignin char∶ZSM-5=1∶1∶1 at 500℃ for 10 min. Meanwhile, the mechanism analysis shows that alkali lignin char mainly plays a role in bond breaking during pyrolysis, while ZSM-5 can act as selective aromatization to obtain higher aromatics yield, whose synergistic effects result in higher aromatic yield.
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