Preparation of various hierarchical HZSM-5 based catalysts for in-situ fast upgrading of bio-oil

Chaihad, Nichaboon; Situmorang, Yohanes Andre; Anniwaer, Aisikaer; Kurnia, Irwan; Karnjanakom, Surachai; Kasai, Yutaka; Abudula, Abuliti; Reubroycharoen, Prasert; Guan, Guoqing

doi:10.1016/j.renene.2021.01.013

Cited by 32 publications

(9 citation statements)

References 42 publications

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“…The increase in S ext , meanwhile, also promoted the secondary upgrading of volatile fragments because it can provide more active sites. 43,44 Therefore, the enhanced catalytic activity by AlF 3 modification further promoted the generation of LAs. Among them, the LAs yield over HZ-1, HZ-2, and HZ-3 increased significantly from 24.8 mg/g over HZ5 to 29.3, 31.0, and 29.2 mg/g, respectively.…”

Section: Resultsmentioning

confidence: 99%

Catalytic Upgrading of Lignite Pyrolysis Volatiles over AlF₃-Modified HZSM-5 to Light Aromatics: Synergistic Effects of One-Step Dealumination and Realumination

Zhao

Cao

et al. 2021

Energy Fuels

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Aluminum fluoride (AlF3)-modified HZSM-5 obtained by simple mechanical mixing and calcination was used to enhance the conversion of the lignite pyrolysis volatiles to light aromatics. The results revealed that the appropriate amount of AlF3 modification can simultaneously dealuminize and aluminize to enhance the catalytic performance, in which dealumination considerably enlarged the pores while realumination generated more midstrength acid sites to compensate for the loss of acid sites caused by dealumination. HZ-2 (HZSM-5 mixed with 2 wt % AlF3) obtained the maximum light aromatics yield of 31.0 mg/g as a result of its abundant mesopores and suitable midstrength acid sites, especially the yield of benzene increased by 6.3 mg/g in comparison with that of the original HZSM-5. However, mixing with only a small amount of AlF3 generated the most serious carbon depositions because of the acidity enhancement by the critical role of alumination. Moreover, excessive AlF3 etched more framework Al that dramatically reduced the midstrength acid sites, inhibiting the formation of light aromatics, although the enlargement of pore size facilitated mass transfer. This one-step modification combining the expansion of the pore size and the optimization of acid sites provides a promising strategy for upgrading the lignite pyrolysis volatiles.

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Section: Resultsmentioning

confidence: 99%

Catalytic Upgrading of Lignite Pyrolysis Volatiles over AlF₃-Modified HZSM-5 to Light Aromatics: Synergistic Effects of One-Step Dealumination and Realumination

Zhao

Cao

et al. 2021

Energy Fuels

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“…42 Respective dealumination and desilication in acid and alkaline solutions have been widely used to create mesopores in zeolites, 11 although these two treatments usually give disordered and non-uniform mesopores due to the uncontrollable dilution of Si-O-Si or Al-O-Si bonds in the zeolite framework. [43][44][45] Silva and co-workers synthesized ZSM-23 with mesopores developed by alkaline treatment, and found that it showed a great coke deposition tolerance in catalytic degradation of ultrahigh molecular weight polyethylene owing to a more open porous structure. 44 Similarly, hierarchical porous ZSM-5 obtained by treating with NaOH and TPAOH solution was used to upgrade bio-oil and yielded 45.2 mg of aromatics per gram of bio-oil.…”

Section: Creation Of Hierarchical Poresmentioning

confidence: 99%

“…44 Similarly, hierarchical porous ZSM-5 obtained by treating with NaOH and TPAOH solution was used to upgrade bio-oil and yielded 45.2 mg of aromatics per gram of bio-oil. 43 In the last decade, various zeolite nanocrystallite aggregates with large numbers of intercrystallite gaps or pores have been synthesized by altering the synthesis gel composition [46][47][48] or adding surfactants, e.g. cetyltrimethylammonium bromide (CTAB), 49 polydiallydimethylammonium chloride (PDADMAC), 50,51 and amino acid.…”

Section: Creation Of Hierarchical Poresmentioning

confidence: 99%

Improvement of adsorption and catalytic properties of zeolites by precisely controlling their particle morphology

Yang

Wang

et al. 2022

Chem. Commun.

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“…The pyrolysis of renewable biomass can produce bio-oil that is a promising alternative to the petroleum resource. , It is necessary to upgrade the bio-oil for many practical applications by improving its properties. , The separation of components and subsequent upgrading of fractions is an effective method to achieve bio-oil upgrading. Distillation could be used to fractionate bio-oil according to the boiling point of components.…”

Section: Introductionmentioning

confidence: 99%

Reactions and Distribution of Levoglucosan during the High-Pressure Reactive Distillation of Bio-Oil

Wang

Liu

Gunawan

et al. 2021

Ind. Eng. Chem. Res.

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High-pressure reactive distillation is a new bio-oil upgrading technology that can achieve high yields of the distillate due to reduced polymerization. Levoglucosan, as an anhydrous sugar, is one of the major components of bio-oil from the pyrolysis of biomass. To understand the reactive distillation of bio-oil at high pressure, the reactions and distribution of levoglucosan during the high-pressure reactive distillation of bio-oil were investigated in this study. Our results indicate that levoglucosan would mainly undergo hydrolysis during the high-pressure distillation, whereas thermal polymerization would dominate during the atmospheric pressure distillation. The reaction environment plays an important role in the levoglucosan reaction. The increase in pressure, temperature, water, and acetic acid concentration could accelerate levoglucosan conversion during bio-oil distillation, especially via the hydrolysis reaction. Most of the levoglucosan during the high-pressure reactive distillation could be converted into small molecules and distilled out due to the presence of light components retained in the liquid phase by high pressure. However, during the atmospheric pressure distillation, most of the levoglucosan would be mainly retained in the heavy residue to undergo polymerization reactions.

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Preparation of various hierarchical HZSM-5 based catalysts for in-situ fast upgrading of bio-oil

Cited by 32 publications

References 42 publications

Catalytic Upgrading of Lignite Pyrolysis Volatiles over AlF₃-Modified HZSM-5 to Light Aromatics: Synergistic Effects of One-Step Dealumination and Realumination

Catalytic Upgrading of Lignite Pyrolysis Volatiles over AlF₃-Modified HZSM-5 to Light Aromatics: Synergistic Effects of One-Step Dealumination and Realumination

Improvement of adsorption and catalytic properties of zeolites by precisely controlling their particle morphology

Reactions and Distribution of Levoglucosan during the High-Pressure Reactive Distillation of Bio-Oil

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Preparation of various hierarchical HZSM-5 based catalysts for in-situ fast upgrading of bio-oil

Cited by 32 publications

References 42 publications

Catalytic Upgrading of Lignite Pyrolysis Volatiles over AlF3-Modified HZSM-5 to Light Aromatics: Synergistic Effects of One-Step Dealumination and Realumination

Catalytic Upgrading of Lignite Pyrolysis Volatiles over AlF3-Modified HZSM-5 to Light Aromatics: Synergistic Effects of One-Step Dealumination and Realumination

Improvement of adsorption and catalytic properties of zeolites by precisely controlling their particle morphology

Reactions and Distribution of Levoglucosan during the High-Pressure Reactive Distillation of Bio-Oil

Contact Info

Product

Resources

About

Catalytic Upgrading of Lignite Pyrolysis Volatiles over AlF₃-Modified HZSM-5 to Light Aromatics: Synergistic Effects of One-Step Dealumination and Realumination

Catalytic Upgrading of Lignite Pyrolysis Volatiles over AlF₃-Modified HZSM-5 to Light Aromatics: Synergistic Effects of One-Step Dealumination and Realumination