Enhancement of the production of bio-aromatics from renewable lignin by combined approach of torrefaction deoxygenation pretreatment and shape selective catalytic fast pyrolysis using metal modified zeolites
Enhancement of the production of bio-aromatics from renewable lignin by combined approach of torrefaction deoxygenation pretreatment and shape selective catalytic fast pyrolysis using metal modified zeolites
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通过烘焙脱氧预处理和金属改性沸石择形催化快速热解相结合的方法，提高可再生木质素生产生物芳烃的能力
DOI：
10.1016/j.biortech.2020.122754
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发表时间：
2020-04-01
影响因子：
11.4
通讯作者：
Chen, Dengyu
中科院分区：
文献类型：
--
作者：
Huang, Ming;Ma, Zhongqing;Chen, Dengyu
采用焙烧脱氧预处理（TDP）和择形催化快速热解（SS-CFP）相结合的方法，以金属改性HZSM-5为双功能催化剂，以提高木质素为原料制备生物BTX的产率。结果表明，经TDP处理后，氧元素能被有效去除。除氧效率在300 ℃时达到最大值22.27%，生物油中不必要的含氧化合物明显减少。与HZSM-5相比，所有金属改性的HZSM-5（Ga/HZSM-5，Zn/HZSM-5，Ga-Zn/HZSM-5）均促进了生物BTX的生成。Zn/HZSM-5催化剂对生物BTX的选择性最高，这是由于其促进了含氧化合物的脱氧反应和烯烃的芳构化反应。TDP和SS-CFP联合处理显著提高了生物BTX的选择性，最高可达65.19%，远高于TDP（33.84%）和SS-CFP（47.36%）单独处理。
In this work, combined approach of torrefaction deoxygenation pretreatment (TDP) and shape selective catalytic fast pyrolysis (SS-CFP) using bifunctional catalyst (metal modified HZSM-5) were employed to improve the yield of bio-BTX derived from the renewable starting material of lignin. Results showed that after TDP, the oxygen element could be removed effectively. The oxygen removal efficiency reached its maximum value of 22.27% at 300 degrees C, resulting in markedly decrease of unnecessary oxygenates in bio-oil. Compared to parent HZSM-5, all metal modified HZSM-5 (Ga/HZSM-5, Zn/HZSM-5, and Ga-Zn/HZSM-5) promoted the formation of bio-BTX. Zn/HZSM-5 showed the highest selective yield of bio-BTX because of the enhancement deoxygenation reaction of oxygenates and the aromatization reaction of olefins. The combined approach of TDP and SS-CFP remarkably improved the selective yield of bio-BTX, reaching the maximum value of 65.19%, which was much higher than that from single approach of TDP (33.84%) and SS-CFP (47.36%).