Catalytic pyrolysis of lignin in a cascade dual-catalyst system of modified red mud and HZSM-5 for aromatic hydrocarbon production
Catalytic pyrolysis of lignin in a cascade dual-catalyst system of modified red mud and HZSM-5 for aromatic hydrocarbon production
复制标题
改性赤泥和HZSM-5级联双催化剂体系催化热解木质素生产芳烃
DOI：
10.1016/j.biortech.2019.01.037
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发表时间：
2019
影响因子：
11.4
通讯作者：
Fu Peng
中科院分区：
文献类型：
--
作者：
Wang Shaoqing;Li Zhihe;Bai Xueyuan;Yi Weiming;Fu Peng
以改性赤泥和HZSM-5为催化剂，在小型微反应器上进行了木质素的催化热解研究。考察了热解温度、改性赤泥与HZSM-5的比、催化剂与木质素的比对产物收率和芳烃选择性的影响。结果表明，550 °C为最佳热解温度，生物油收率最高（20.16 wt%）。改性赤泥与HZSM-5的比例为1:1时，单环芳烃（MAHs）含量增加到41.27%，多环芳烃（PAHs）含量下降到22.65%。同样，当催化剂与木质素的比例为2:1时，产生的MAHs含量较高，而PAHs含量降低。级联双催化剂系统可作为处理环境影响较大的木质素和赤泥废弃物的有效途径。此外，本研究还为丰富木质素资源的增值提供了解决方案。
Catalytic pyrolysis of lignin over a dual-catalyst system of modified red mud and HZSM-5 was carried out in a bench-scale micro-reactor. Effects of pyrolysis temperature, modified red mud to HZSM-5 ratio, catalysts to lignin ratio on the yield of products and selectivity of aromatic hydrocarbons were investigated. Results indicated that 550 °C was the optimal pyrolysis temperature with the maximal yield of bio-oil (20.16 wt%). At a modified red mud to HZSM-5 ratio of 1:1, the content of monocyclic aromatic hydrocarbons (MAHs) increased to 41.27% whereas that of polycyclic aromatic hydrocarbons (PAHs) decreased to 22.65%. Likewise, at a catalysts to lignin ratio of 2:1, a higher content of MAHs was produced with a decreased content of PAHs. The cascade dual-catalyst system may serve as an efficient approach to disposing lignin and red mud wastes with significant environmental impact. Besides, this study provides a solution for the valorization of lignin-rich resources.