Catalytic hydrodeoxygenation of crude bio-oil over an unsupported bimetallic dispersed catalyst in supercritical ethanol

Yang, Tianhua; Jie, Yefei; Li, Bingshuo; Xing, Kai; Zheng, Yan; Li, Rundong

doi:10.1016/j.fuproc.2016.01.004

Cited by 78 publications

(30 citation statements)

References 43 publications

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“…HDO removes oxygen in bio-oil as H 2 O, CO, and/or CO 2 [93,94]. This results in the production of stable hydrocarbon biofuel with higher energy content.…”

Section: Hydrodeoxygenationmentioning

confidence: 99%

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Application, Deactivation, and Regeneration of Heterogeneous Catalysts in Bio-Oil Upgrading

et al. 2016

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Abstract:The massive consumption of fossil fuels and associated environmental issues are leading to an increased interest in alternative resources such as biofuels. The renewable biofuels can be upgraded from bio-oils that are derived from biomass pyrolysis. Catalytic cracking and hydrodeoxygenation (HDO) are two of the most promising bio-oil upgrading processes for biofuel production. Heterogeneous catalysts are essential for upgrading bio-oil into hydrocarbon biofuel. Although advances have been achieved, the deactivation and regeneration of catalysts still remains a challenge. This review focuses on the current progress and challenges of heterogeneous catalyst application, deactivation, and regeneration. The technologies of catalysts deactivation, reduction, and regeneration for improving catalyst activity and stability are discussed. Some suggestions for future research including catalyst mechanism, catalyst development, process integration, and biomass modification for the production of hydrocarbon biofuels are provided.

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“…HDO removes oxygen in bio-oil as H 2 O, CO, and/or CO 2 [93,94]. This results in the production of stable hydrocarbon biofuel with higher energy content.…”

Section: Hydrodeoxygenationmentioning

confidence: 99%

“…Besides, alumina is unstable under hydrothermal conditions, and it can partially transform into boehmite in the presence of water vapor at reaction temperature (140-380 • C) [107]. Finally, Al 2 O 3 support shows a high tendency for polymerization reactions due to the high acidity resulting in coke deposition [93].…”

Section: Sulfided Catalystsmentioning

confidence: 99%

Application, Deactivation, and Regeneration of Heterogeneous Catalysts in Bio-Oil Upgrading

et al. 2016

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“…Physicochemical properties including pH, water content and higher heating valueof upgraded bio-oils and raw bio-oilare shown in Table 3. Water content has a negative effect on the combustion performance of upgraded bio-oils in engines [22].The water content of upgraded bio-oil ranged from 11.48 wt.% to 20.43 wt.%, and it wasreduced significantly from the water content of 26.91 wt.% present in raw bio-oil.The reduced water content was due to the increased hydrocarbon hydrophobic products in the oil phase [45].There is an obvious increase in the higher heating values of upgraded bio-oil (17.13-30.47 MJkg -1 ) compared to raw bio-oil (15.54 MJkg -1 ).This is attributed to the lower contents of water and oxygenated compounds presentin the upgraded bio-oils. The HDO process effectively improved the energy content of upgraded bio-oil products.…”

Section: Physicochemical Properties Of Upgraded Bio-oilmentioning

confidence: 99%

Hydrocarbon bio-oil production from pyrolysis bio-oil using non-sulfide Ni-Zn/Al2O3 catalyst

Cheng

Wei

Julson

et al. 2017

Fuel Processing Technology

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Upgraded bio-oil can partly replace fossil fuels to reduce the environmental issues caused by the massive consumption of fossil fuels.Hydrodeoxygenation is a promising route for upgraded bio-oil production from pyrolysis bio-oil. Non-sulfide catalysts are effective in bio-oil hydrodeoxygenation due to low cost and high activity. Ni-Zn/Al 2 O 3 catalysts were first used to selectively produce hydrocarbon upgraded bio-oil through bio-oilhydrodeoxygenation.Upgrading pine sawdust bio-oil to upgraded hydrocarbon bio-oil was performed using a series of Ni and/or Zn loaded Al 2 O 3 catalysts.The crystalline structure of Al 2 O 3 was maintained after Ni and/or Zn loading, but BET surface area and total pore volume of Ni-Zn/Al 2 O 3 catalysts decreased significantly compared to Al 2 O 3 support.Bimetallic Ni-Zn/Al 2 O 3 catalysts were more effective than monometallic Ni/Al 2 O 3 or Zn/Al 2 O 3 catalyst. Bimetallic 15%Ni-5%Zn/Al 2 O 3 catalyst generated the highest upgraded bio-oil yield at 44.64 wt.% and produced the upgraded bio-oil with the highest hydrocarbon content at 50.12%. Physicochemical properties of upgraded bio-oilsincluding heating value, water content and pH were significantly improved in

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“…Thus, making the former suitable substituents in the synthesis of Phenol formaldehyde adhesive. A semi-continuous process biomass liquefaction flow chart [34].…”

Section: Hydrothermal Liquefaction Techniquementioning

confidence: 99%

Lignin Hydrothermal Liquefaction into Bifunctional Chemicals: A Concise Review

Alhassan¹,

Hornung²,

Bugaje³

2020

Biorefinery Concepts, Energy and Products

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Lignin, the second largest biomass after cellulose is underutilized. Yet, it remains the only natural source of aromatic, and phenolic compounds. It is imperative to, amidst the expanding interest on biomass conversion, to accord the necessary attention towards lignin degradation into value added chemicals. Specifically, its phenyl, guaiacyl, and syringyl derivatives. Understanding lignin degradation chemistry, goes a long way in its selective valorization into fuels and chemicals via thermochemical routes such as hydrothermal liquefaction (HTL). Therefore, development of technologies targeting value addition of products and by-products from lignin, would undoubtedly give way to emerging markets in the industry. Previous review papers focused on the general HTL of biomass, food waste, algae, and their model compounds. However, review on HTL of lignin is scarcely available. This paper presents the detailed literature analyses of the current trend in lignin degradation via HTL. Effect of HTL conditions including temperature, heating rate and catalyst has been reviewed. In-depth discussion on use of ionic liquids as catalyst for HTL of lignin has also been compiled. Other lignin degradation techniques such as pyrolysis and hydrolysis were also discussed. This is aimed at bringing together an up-to-date information on lignin degradation into selected chemical intermediates.

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Catalytic hydrodeoxygenation of crude bio-oil over an unsupported bimetallic dispersed catalyst in supercritical ethanol

Cited by 78 publications

References 43 publications

Application, Deactivation, and Regeneration of Heterogeneous Catalysts in Bio-Oil Upgrading

Application, Deactivation, and Regeneration of Heterogeneous Catalysts in Bio-Oil Upgrading

Hydrocarbon bio-oil production from pyrolysis bio-oil using non-sulfide Ni-Zn/Al2O3 catalyst

Lignin Hydrothermal Liquefaction into Bifunctional Chemicals: A Concise Review

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