Enhancement of light aromatics from catalytic fast pyrolysis of cellulose over bifunctional hierarchical HZSM-5 modified by hydrogen fluoride and nickel/hydrogen fluoride

Wang, Jing-Xian; Cao, Jing‐Pei; Zhao, Xiao-Yan; Liu, Sheng-Nan; Ren, Xue-Yu; Zhao, Ming; Cui, Xin; Chen, Qiang; Wei, Xian‐Yong

doi:10.1016/j.biortech.2019.01.059

Cited by 103 publications

(53 citation statements)

References 47 publications

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“…This modification resulted in improvements in this CFP catalyst [107]. HF modification of HZSM-5 and later doped by Ni produced a catalyst that increased yields of BTX [110]. The acid modification created mesopores and reduced Brønsted acidity via dealumination.…”

Section: Metal Doped Hzsm-5mentioning

confidence: 99%

Catalytic Fast Pyrolysis of Lignocellulosic Biomass to Benzene, Toluene, and Xylenes

Gong¹

2022

Recent Perspectives in Pyrolysis Research

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Catalytic Fast Pyrolysis is a rapid method to depolymerize lignocellulose to its constituent components of hemicellulose, cellulose, and lignin. The pyrolysis reaction in absence of oxygen occurs at a very high heating rate to a targeted temperature of 400 to 600 °C for very short residence time. Vapors which are not condensed and are then contacted with a catalyst that is efficient to deoxygenate and aromatize the pyrolyzed biomass. One class of highly valuable material that is produced is a mixture of benzene, toluene, and xylenes. From this mixture, para-xylene is extracted for further upgrading to polyethylene terephthalate, a commodity polyester which has a demand in excess of 80 million tonnes/year. Addressed within this review is the catalytic fast pyrolysis, catalysts examined, process chemistry, challenges, and investigation of solutions.

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Section: Metal Doped Hzsm-5mentioning

confidence: 99%

Catalytic Fast Pyrolysis of Lignocellulosic Biomass to Benzene, Toluene, and Xylenes

Gong¹

2022

Recent Perspectives in Pyrolysis Research

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“… Pyrolysis . Gaseous mixtures and value-added chemicals (e.g., aromatic hydrocarbons) could be produced from biomass pyrolysis in the absence of O 2 /air, while the high amount of organic oxygen species and water in the products limited technology development. , Therefore, many researchers started to investigate the composition and amount of the pyrolysis products in the presence of a catalyst (e.g., zeolites). ,− However, the quick deactivation of the catalyst due to the complexity of tar is still a challenge, and an effective and rapid char separation technique is also required to reduce contamination. Gasification . Gasification is usually performed in the presence of a gasifying carrier (e.g., air, O 2 , steam, CO 2 ), which consists of conversion of a solid/liquid organic compound .…”

Section: Introductionmentioning

confidence: 99%

Understandings of Catalyst Deactivation and Regeneration during Biomass Tar Reforming: A Crucial Review

Ren

Cao

Yang

et al. 2021

ACS Sustainable Chem. Eng.

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Value-added chemicals originating from biomass gasification in the presence of advanced catalysts have proved to be promising for valuable chemical generation via deep processing. In the issues of biomass gasification, the deactivation of heterogeneous catalysts is a common problem during the reforming of biomass tar and derived model compounds. Herein, deactivation pathways and regeneration methods are crucial to understand the production of value-added chemicals and guide the design of heterogeneous catalysts during biomass gasification. Unfortunately, to the best of our knowledge, there still has been no review to conclude the recent advances in catalyst deactivation and regeneration. To address the issues mentioned above, in this perspective, common catalysts for biomass tar reforming are first discussed. Then, key features and considerations of catalyst deactivation especially catalyst poisoning and carbon deposition are comprehensively reviewed based on the latest literature reports. Finally, the possible methods of tar elimination, metallic site recovery, and catalyst optimization are reviewed. Meanwhile, the future perspectives toward catalyst design, deactivation, and regeneration in tar reforming are shared. Through this perspective, the existing challenges, solutions, and future strategies in tar reforming or other gas−solid reactions are expected to be made clearer for following research on practical applications on an industrial scale.

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“…With the depletion of fossil fuels, increasing attention has been focused on producing value-added chemicals and transportation fuels from biomass. [1][2][3][4][5] The production of levulinic acid (LA) from biomass or derivatives of biomass has also attracted increasing attention, as LA is a raw material for the production of pharmaceutical intermediates or additives in the cosmetic and fuel sectors. [6][7][8] Besides, LA is also a platform chemical for the production of other value-added chemicals, including levulinic esters, [9][10][11] γ-valerolactone, 12,13 1,4-pentanediol, 14 etc.…”

Section: Introductionmentioning

confidence: 99%

“…With the depletion of fossil fuels, increasing attention has been focused on producing value‐added chemicals and transportation fuels from biomass . The production of levulinic acid (LA) from biomass or derivatives of biomass has also attracted increasing attention, as LA is a raw material for the production of pharmaceutical intermediates or additives in the cosmetic and fuel sectors .…”

Section: Introductionmentioning

confidence: 99%

Sulfated TiO₂ nanosheets catalyzing conversion of biomass derivatives: influences of the sulfation on distribution of Brønsted and Lewis acidic sites

Shao

Gao

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND The synthesis of solid acid catalysts of recoverable and environmentally friendly nature has gained increasing attention in recent years. The distribution of Brønsted and Lewis acidic sites on the surface of sulfated metal oxides determines the catalytic performance, which is affected by many key factors, such as the concentration of sulfuric acid impregnated and the morphology of the metal oxides used. In this study, TiO2 nanosheets were successfully synthesized and used as carrier for the preparation of solid acid catalysts. RESULTS The concentration of sulfuric acid for the impregnation resulted in various distributions of Brønsted and Lewis acidic sites on the surface of sulfated TiO2. With a medium concentration of sulfuric acid (1 mol L−1) for the impregnation, the highest ratio of Brønsted to Lewis acidic sites can be achieved, and the catalyst showed superior catalytic activity for the conversion of furfuryl alcohol (FA) to ethyl levulinate (EL) in ethanol and the conversion of fructose to 5‐hydroxymethylfurfural (HMF) in dimethyl sulfoxide (DMSO). CONCLUSION The sulfation of TiO2 nanosheets induced the formation of both Brønsted and Lewis acidic sites. The Brønsted acidic sites were more effective for catalyzing the conversion of FA or fructose. The poor recyclability of the 1.0‐SO42−/TiO2 catalyst in the conversion of FA to EL in ethanol, a protic solvent, was due to the leaching of sulfur species. The deactivation of the catalyst in DMSO was due to coking, which could be resolved via calcination of the coke species in air. © 2019 Society of Chemical Industry

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Enhancement of light aromatics from catalytic fast pyrolysis of cellulose over bifunctional hierarchical HZSM-5 modified by hydrogen fluoride and nickel/hydrogen fluoride

Cited by 103 publications

References 47 publications

Catalytic Fast Pyrolysis of Lignocellulosic Biomass to Benzene, Toluene, and Xylenes

Catalytic Fast Pyrolysis of Lignocellulosic Biomass to Benzene, Toluene, and Xylenes

Understandings of Catalyst Deactivation and Regeneration during Biomass Tar Reforming: A Crucial Review

Sulfated TiO₂ nanosheets catalyzing conversion of biomass derivatives: influences of the sulfation on distribution of Brønsted and Lewis acidic sites

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Enhancement of light aromatics from catalytic fast pyrolysis of cellulose over bifunctional hierarchical HZSM-5 modified by hydrogen fluoride and nickel/hydrogen fluoride

Cited by 103 publications

References 47 publications

Catalytic Fast Pyrolysis of Lignocellulosic Biomass to Benzene, Toluene, and Xylenes

Catalytic Fast Pyrolysis of Lignocellulosic Biomass to Benzene, Toluene, and Xylenes

Understandings of Catalyst Deactivation and Regeneration during Biomass Tar Reforming: A Crucial Review

Sulfated TiO2 nanosheets catalyzing conversion of biomass derivatives: influences of the sulfation on distribution of Brønsted and Lewis acidic sites

Contact Info

Product

Resources

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Sulfated TiO₂ nanosheets catalyzing conversion of biomass derivatives: influences of the sulfation on distribution of Brønsted and Lewis acidic sites