Catalytic pyrolysis of enzymatic hydrolysis lignin by transition-metal modified HZSM-5/MCM-41 core–shell catalyst for the enhancement of monocyclic aromatic hydrocarbons

Zheng, Xiang; Zhong, Zhaoping; Zhang, Bo; Du, Haoran; Wang, Wei; Li, Qian; Yang, Yuxuan; Qi, Renzhi; Li, Zhaoying

doi:10.1016/j.jaap.2022.105849

Cited by 20 publications

(2 citation statements)

References 69 publications

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“…Furthermore, in order to adjust the external acidic sites and mitigate the catalyst deactivation led by coking during catalytic lignin pyrolysis, zeolites or hierarchical zeolites are usually modified by a transition metal. Literature reports demonstrated that zinc-modified zeolites were very effective in improving the selectivity for aromatics from lignin catalytic pyrolysis [35,[45][46][47]. Meanwhile, our prior research corroborates this trend, revealing the remarkable catalytic efficacy of zinc-modified hierarchical zeolite (Zn-ZSM-5/MCM41) in the co-pyrolysis of lignin and LDPE, paving the way for the production of hydrocarbon-rich biofuels.…”

Section: Introductionsupporting

confidence: 73%

Hydrocarbon-Rich Bio-Oil Production from Ex Situ Catalytic Microwave Co-Pyrolysis of Peanut Shells and Low-Density Polyethylene over Zn-Modified Hierarchical Zeolite

Dong,

Yue,

Bai

et al. 2024

Catalysts

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Peanut shells, a major economic and oil crop in China, boast an abundant availability and remarkably high lignin content compared to other agricultural residues. Previous work indicated that the modified hierarchical zeolite (Zn-ZSM-5/MCM41) was effective in promoting the conversion of intermediate macromolecules during the lignin pyrolysis reaction and enhancing the yield and selectivity of liquid products. Thereby, this study aims to improve the quality of liquid products in the ex situ catalytic microwave co-pyrolysis of peanut shells and LDPE by utilizing Zn-ZSM-5/MCM41. Employing a compound center experimental design, we optimized reaction conditions through response surface analysis. The impact of microwave pyrolysis temperature and the catalyst-to-feedstock ratio on yield distribution and liquid product selectivity was explored. Results indicated a marginal increase in liquid product yield with rising pyrolysis temperatures. Moreover, an initial increase followed by a subsequent decrease in liquid product yield was observed with an increase in the catalyst-to-feedstock ratio. Optimal conditions of 450 °C and a catalyst-to-peanut hull ratio of 2.34% yielded the highest bio-oil yield at 34.25%. GC/MS analysis of the bio-oil revealed a peak in hydrocarbon content at 68.36% under conditions of 450 °C and a catalyst-to-feedstock ratio of 13.66%. Additionally, the quadratic model effectively predicted bio-oil yield and the selectivity for major chemical components. This study underscores the potential of Zn-ZSM-5/MCM41 in optimizing liquid product quality during catalytic co-pyrolysis, offering insights into bio-oil production and its chemical composition.

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Section: Introductionsupporting

confidence: 73%

Hydrocarbon-Rich Bio-Oil Production from Ex Situ Catalytic Microwave Co-Pyrolysis of Peanut Shells and Low-Density Polyethylene over Zn-Modified Hierarchical Zeolite

Dong,

Yue,

Bai

et al. 2024

Catalysts

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“…The catalyst surface frequently serves as a location where oxygen-containing large molecules result in deactivation through coking and reduced selectivity toward aromatics. 13,14 Hence, it is essential to pre-pyrolyze the initial volatiles from lignin. This process converts the macromolecular oxygen-containing intermediates into smaller compounds and hydrogen-rich gases, thereby enhancing the efficiency of mass transfer for these volatiles on HZSM-5.…”

Section: Introductionmentioning

confidence: 99%

Enhanced aromatics production through Fe and HZSM-5 catalytic lignin pyrolysis with magnetic field assistance

Yao,

Zhao,

Guan

et al. 2024

Green Chem.

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Preparation and application of lanthanum-cobalt bimetallic modified composite ZSM-5/MCM-41 zeolite: Enhancing the stability of aromatic compounds produced by lignin cracking in catalytic pyrolysis of pine sawdust

Wang,

Ma,

Guo

et al. 2023

Applied Catalysis A: General

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Catalytic pyrolysis of enzymatic hydrolysis lignin by transition-metal modified HZSM-5/MCM-41 core–shell catalyst for the enhancement of monocyclic aromatic hydrocarbons

Cited by 20 publications

References 69 publications

Hydrocarbon-Rich Bio-Oil Production from Ex Situ Catalytic Microwave Co-Pyrolysis of Peanut Shells and Low-Density Polyethylene over Zn-Modified Hierarchical Zeolite

Hydrocarbon-Rich Bio-Oil Production from Ex Situ Catalytic Microwave Co-Pyrolysis of Peanut Shells and Low-Density Polyethylene over Zn-Modified Hierarchical Zeolite

Enhanced aromatics production through Fe and HZSM-5 catalytic lignin pyrolysis with magnetic field assistance

Preparation and application of lanthanum-cobalt bimetallic modified composite ZSM-5/MCM-41 zeolite: Enhancing the stability of aromatic compounds produced by lignin cracking in catalytic pyrolysis of pine sawdust

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