Directional synthesis of ethylbenzene through catalytic transformation of lignin

Fan, Mingming; Jiang, Peng; Bi, Peiyan; Deng, Shumei; Liu, Yan; Zhai, Qi; Wang, Zhihui; Li, Quanxin

doi:10.1016/j.biortech.2013.05.097

Cited by 42 publications

(16 citation statements)

References 31 publications

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“…Sawdust was directionally converted into p ‐xylene by a one‐pot catalytic pyrolysis process under atmospheric pressure. The catalytic pyrolysis of sawdust for the production of aromatics was carried out in a fixed‐bed reactor using metal oxide‐modified HZSM‐5(80) catalysts, using the same procedures described in our previous work . Briefly, the system was mainly composed of a tube reactor, a feeder for solid reactants, two condensers and a gas analyzer.…”

Section: Methodsmentioning

confidence: 99%

“…The catalytic pyrolysis of sawdust for the production of aromatics was carried out in a fixed-bed reactor using metal oxide-modified HZSM-5(80) catalysts, using the same procedures described in our previous work. 32,33 Briefly, the system was mainly composed of a tube reactor, a feeder for solid reactants, two condensers and a gas analyzer. The ex-situ CFP of biomass was used in this work, including two cascade processes: pyrolysis of biomass and subsequent upgrading of biomass pyrolysis vapor in the two different zones of the reactor.…”

Section: Procedures For Production Of Biomass-based P-xylenementioning

confidence: 99%

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Production of bio‐based p‐xylene via catalytic pyrolysis of biomass over metal oxide‐modified HZSM‐5 zeolites

Chang

Zhu

Jin

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND p‐Xylene is an important bulk chemical in the petrochemical industry, and the production of bio‐based p‐xylene is of great significance in both academic and industrial arenas. However, the biggest challenge for the production of p‐xylene from biomass is how to increase the yield and selectivity of p‐xylene. RESULTS The highest p‐xylene yield of 20.7 C‐mol% with a p‐xylene/xylenes ratio of 91.6% was obtained by the co‐catalytic pyrolysis of sawdust with 50 wt% methanol over the 20%La2O3/HZSM‐5(80) catalyst. Adding a La, Mg, Ce or Zn element into HZSM‐5 promoted the alkylation of benzene and toluene to form xylenes, and the isomerization of m/o‐xylenes to p‐xylene. CONCLUSION This work developed a one‐pot process in which lignocellulosic biomass (sawdust) was directionally converted into p‐xylene by coupling the catalytic pyrolysis of biomass into aromatic monomers, the alkylation of light aromatics to xylenes and the isomerization of m/o‐xylenes to p‐xylene over the metal oxide‐modified HZSM‐5 catalysts. The selectivity and yield of p‐xylene strongly depended on the acidity of the catalysts, reaction temperature and methanol additive during the catalytic pyrolysis of sawdust. © 2018 Society of Chemical Industry

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Section: Methodsmentioning

confidence: 99%

Section: Procedures For Production Of Biomass-based P-xylenementioning

confidence: 99%

Production of bio‐based p‐xylene via catalytic pyrolysis of biomass over metal oxide‐modified HZSM‐5 zeolites

Chang

Zhu

Jin

et al. 2018

J of Chemical Tech & Biotech

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“…In previous studies, on the catalytic cracking of biomass and bio-oil [26,27], the catalysts of Ni/HZSM-5 and Re/Y were selected for the catalytic pyrolysis of lignin and for removing the functional groups of aromatics in the lignin-derived oil, respectively. HZSM-5 (25) zeolite with a Si/Al ratio of 25 obtained from Nankai University catalyst Co., Ltd. (Tianjin, China) was calcined in air atmosphere at 550 • C for 4 h prior to use.…”

Section: B Catalystsmentioning

confidence: 99%

Production of Benzene from Lignin through Current Enhanced Catalytic Conversion

Fan

2017

Chinese Journal of Chemical Physics

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The directional production of benzene is achieved by the current-enhanced catalytic conversion of lignin. The synergistic effect between catalyst and current promotes the depolymerization of lignin and the selective recombinant of the functional groups in the aromatic monomers. A high benzene yield of 175 g benzene /kg lignin was obtained with an excellent selectivity of 92.9 C-mol%. The process potentially provides a promising route for the production of basic petrochemical materials or high value-added chemicals using renewable biomass.

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“…In our previous work, we have investigated using biomass or bio-oil for the production of aromatic chemicals, including C 6 -C 8 aromatics, ethylbenzene, cumene, phenol and C 8 -C 15 aromatics. [44][45][46][47][48] To produce bio-based PX, we also investigated recently the catalytic pyrolysis of sawdust over zeolites modified with single metal oxides such as La 2 O 3 , CeO 2 , MgO or ZnO. 42 The present work aimed to directionally convert furanic compounds into PX and understand the reaction mechanism.…”

Section: Introductionmentioning

confidence: 99%

Selective conversion of furans to p‐xylene with surface‐modified zeolites

Zhu

Fan

Wang

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Owing to the growing consumption of oil and the negative environmental impacts, the production of p‐xylene (PX) from renewable biomass has gained significant attention recently. However, the major challenge for the production of PX from biomass or furans is how to improve the yield and selectivity of PX, along with reducing coke. RESULTS The para selectivity in the catalytic conversion of furans was greatly enhanced owing to the deactivation of external surface and the adjustment of pore entrance. Co‐catalytic conversion of furans and methanol significantly enhanced the production of PX by the Diels–Alder reactions between furans and olefins and the alkylation of benzene/toluene with methanol. The highest PX yield of 17.8 C‐mol% with a p‐xylene/xylene ratio of 94.5% was obtained by the co‐conversion of 2‐methylfuran with methanol over the 15%La/10%Ce/HZ catalyst. CONCLUSION This work proved that furans (2‐methylfuran, 2,5‐dimethylfuran, furfural and furan) were able to be selectively converted into a high‐value chemical (PX) over the 15%La/10%Ce/HZ catalyst. The transformation mainly involved four key reactions: the catalytic cracking of furans, the Diels–Alder reactions, the alkylation of aromatics and the isomerization of xylenes over the surface‐modified zeolite. © 2019 Society of Chemical Industry

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Directional synthesis of ethylbenzene through catalytic transformation of lignin

Cited by 42 publications

References 31 publications

Production of bio‐based p‐xylene via catalytic pyrolysis of biomass over metal oxide‐modified HZSM‐5 zeolites

Production of bio‐based p‐xylene via catalytic pyrolysis of biomass over metal oxide‐modified HZSM‐5 zeolites

Production of Benzene from Lignin through Current Enhanced Catalytic Conversion

Selective conversion of furans to p‐xylene with surface‐modified zeolites

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