Fast catalytic pyrolysis of lignin into monocyclic aromatic hydrocarbons over in-situ generated Fe-based catalyst
Journal Title: Energy Environmental Protection - Year 2024, Vol 38, Issue 2
Abstract
This study examined the catalytic pyrolysis of kraft lignin using an in-situ generated Fe-based catalyst from iron ore. The fresh and spent catalysts were characterized by a transmission electron microscope to investigate the morphological changes of the catalysts. To evaluate the catalysts′ performance, a segmented pyrolysis reactor coupled with time-of-flight mass spectrometry was employed. The results showed that the fresh catalysts had a particle-like morphology, while the spent catalysts appeared sintered. Compared to unreduced iron ore and commercial Fe_2O_3, reduced iron ore significantly promoted the production of monocyclic aromatic hydrocarbons. A yield of monocyclic aromatic hydrocarbons reached 81% at the optimized reaction temperature of 550 ℃, with benzene, toluene, xylene and trimethylbenzene accounting for 46%, 34%, 13% and 7% respectively. Moreover, the possible pathway for kraft lignin via catalytic pyrolysis was proposed based on dehydroxylation and demethoxylation. This work suggests that a low-cost iron ore catalyst could potentially be applied to pyrolyze kraft lignin to produce valuable bio-based aromatic hydrocarbons.
Authors and Affiliations
ZHANG Jing|School of Mechanical Engineering, Shanghai Jiao Tong University, China, SHEN Yang|School of Mechanical Engineering, Shanghai Jiao Tong University, China, ZHU Linyu|School of Mechanical Engineering, Shanghai Jiao Tong University, China, LIU Haoran*|School of Mechanical Engineering, Shanghai Jiao Tong University, China, China Energy Engineering Group Anhui Electric Power Design Institute Co., Ltd., China, ZHOU Zhongyue*|School of Mechanical Engineering, Shanghai Jiao Tong University, China
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- EP ID EP737167
- DOI 10.20078/j.eep.20240205
- Views 83
- Downloads 0
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