Two-step catalytic hydrodeoxygenation of fast pyrolysis oil to hydrocarbon liquid fuels

Xu, Xin; Zhang, Changsen; Liu, Yonggang; Zhai, Yunpu; Zhang, Ruiqin

doi:10.1016/j.chemosphere.2013.06.060

Cited by 78 publications

(45 citation statements)

References 32 publications

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“…The oxygen content of the hydrocarbon fuel decreased from 48.0 wt% rigidly contained in the bio-oil to 0.5 wt%. The HHV increased from 17.0 to 46.0 MJ/kg [18].…”

Section: Introductionmentioning

confidence: 94%

“…Hydrodeoxygenation (HDO) is a widely practiced method to produce hydrocarbons from pyrolysis oil [12][13][14][15][16][17][18]. Elliot and Baker [19] in U.S. Patent No.…”

Section: Introductionmentioning

confidence: 99%

“…It has now become traditional to apply this method to partially upgrade bio-oil prior to application of hydrocracking as a second stage to produce pure hydrocarbons. The utilization of a mild hydrotreating prevents polymerization of the bio-oil that would occur if direct hydrocracking were applied without this step [12,18,20,21].…”

Section: Introductionmentioning

confidence: 99%

“…Xu et al [18] investigated two-stage catalytic HDO of fast pyrolysis oil to produce hydrocarbon liquid fuels. Researchers employed a first mild hydrotreating step to bio-oil to overcome coke formation using Ru/C noble catalyst at a temperature of 300°C and 1500 psig hydrogen pressure.…”

Section: Introductionmentioning

confidence: 99%

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Direct hydrocracking of oxidized bio-oil to hydrocarbons

Tanneru

Steele

2015

Fuel

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h i g h l i g h t sDirect hydrocracking of oxidized bio-oil to produce liquid hydrocarbons was tested. Hydrocarbon yield 36.6% higher than for raw bio-oil was achieved. GC-MS results showed 99.2 area% of hydrocarbon compounds in the produced product. The liquid hydrocarbons had 6.9% higher HHV than for HDO of raw bio-oil. a b s t r a c tHydrodeoxygenation is considered a promising technology to convert bio-oils to liquid transportation fuels. Recently we tested a hydrodeoxygenation method to convert oxidized bio-oil to increase liquid fuel yield, reduce char and reduce required hydrogen. In this current study we tested direct hydrocracking of the oxidized bio-oil to produce high-energy liquid hydrocarbons. We tested various reaction conditions (reaction temperature, hydrogen pressure, time and catalyst type) on the hydrocracking of the oxidized bio-oil. Direct hydrocracking of the oxidized bio-oil produced 36.6% higher hydrocarbons yield compared to direct hydrocracking of the raw bio-oil. The hydrocarbons mixture produced had a higher heating value (HHV) of 43.6 MJ/kg. The oxygen content and acid value were 0.5 wt% and 0.3 mg KOH/g, respectively. Density and viscosity were considerably low at 0.9 g/ml and 1.8 cSt, respectively. pH value was 8.4. The hydrocarbon mixture was also analyzed by GC-MS, FTIR, NMR and DHA.

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“…The oxygen content of the hydrocarbon fuel decreased from 48.0 wt% rigidly contained in the bio-oil to 0.5 wt%. The HHV increased from 17.0 to 46.0 MJ/kg [18].…”

Section: Introductionmentioning

confidence: 94%

“…Hydrodeoxygenation (HDO) is a widely practiced method to produce hydrocarbons from pyrolysis oil [12][13][14][15][16][17][18]. Elliot and Baker [19] in U.S. Patent No.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Direct hydrocracking of oxidized bio-oil to hydrocarbons

Tanneru

Steele

2015

Fuel

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“…This ensures the thermal stability of the bio‐oil for the second stage at high temperature with the hydrodeoxygenation of the lignin fraction compounds (e. g. anisole, guaiacol and other aromatics) at a temperature of 300–500 °C and a hydrogen pressure of 10 to 20 MPa. In both cases, the catalyst should have a high activity, stability in the medium with high acidity and low tendency to coke formation …”

Section: Introductionmentioning

confidence: 99%

Hydrotreatment of Anisole and Furfural as Model Compounds of Bio‐oil over Chromium Modified Nickel‐Based Catalysts

et al. 2019

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Hydrotreatment of anisole and furfural as model compounds of carbohydrates and lignin fraction of pyrolysis liquids was studied using Cr‐containing (from 0 to 18 wt%) Ni‐based sol‐gel catalysts. The catalytic activity of Ni−Cr catalysts was carried out in the autoclave at pressure 6.0 MPa of hydrogen and temperature 320 °C and 100 °C for anisole and furfural hydrotreatment, respectively. Addition of Cr to Ni‐SiO2 catalyst results in increasing activity in anisole conversion with the maximum for NiCr10‐SiO2 catalyst. This is attributed to the formation of dispersed metallic Ni detected by X‐ray diffraction method. Moreover, the Cr addition increases the corrosion resistance of samples in the medium of acetic acid at boiling temperature. In furfural conversion, the Cr‐doped catalysts showed the lowest activity, however, for NiCr10‐SiO2 catalyst the high selectivity to tetrahydrofurfuryl alcohol formation was observed.

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Techno‐economic assessment of biorefinery technologies for aviation biofuels supply chains in Brazil

Alves

Valk²,

Jong

et al. 2016

Biofuels Bioprod Bioref

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Production of aviation biofuels has been strongly encouraged by the volatility of oil prices and environmental concerns. Brazilian society, companies, and government are taking a step forward in the production of renewable jet fuel from biomass feedstocks largely available in the territory. This study evaluated the use of different feedstocks (sugar crops, oil crops, and lignocellulosic biomass) for co‐production of biojet fuel and higher value‐added products in a biorefinery platform. The co‐production of biofuels and biochemicals in a biorefinery context was demonstrated to be economically feasible. The main cost drivers of such a platform are feedstock biomass cost, selling price of the biochemicals, investment costs, and key process‐inherent parameters such as conversion yields, obtained fermentable sugars, or oil content in the feedstock. Sugarcane was the most promising feedstock for a biorefinery in the region of Minas Gerais, while soybean was the most promising feedstock for a biorefinery in the region of Rio Grande do Sul, despite its higher uncertainty. Succinic acid was the most promising chemical intermediate for biopolymers industry due to its relatively high market value, unique market opportunity as a substitute of conventional petrochemicals, and forecast for future growth. Ethanol‐to‐jet (ETJ) and hydro‐processed esters and fatty acids (HEFA) were the most attractive biojet fuel production routes in the present study. Scenarios for co‐production of biofuels and biochemicals in Brazil present large uncertainties and high financial risk, mainly due to the use of second‐generation feedstocks, and the introduction of new technologies and products. © 2016 Society of Chemical Industry and John Wiley & Sons, Ltd

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Two-step catalytic hydrodeoxygenation of fast pyrolysis oil to hydrocarbon liquid fuels

Cited by 78 publications

References 32 publications

Direct hydrocracking of oxidized bio-oil to hydrocarbons

Direct hydrocracking of oxidized bio-oil to hydrocarbons

Hydrotreatment of Anisole and Furfural as Model Compounds of Bio‐oil over Chromium Modified Nickel‐Based Catalysts

Techno‐economic assessment of biorefinery technologies for aviation biofuels supply chains in Brazil

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