Catalytic upgrading of intermediate pyrolysis bio-oil to hydrocarbon-rich liquid biofuel via a novel two-stage solvent-assisted process

Jude A. Onwudili; Cristiane A. Scaldaferri

doi:10.1016/j.fuel.2023.129015

Catalytic upgrading of intermediate pyrolysis bio-oil to hydrocarbon-rich liquid biofuel via a novel two-stage solvent-assisted process

Jude A. Onwudili, Cristiane A. Scaldaferri

Research output: Contribution to journal › Article › peer-review

Abstract

A novel two-stage solvent-assisted batch catalytic hydroprocessing method has been developed for upgrading intermediate pyrolysis bio-oil to produce blended liquid fuels with ≈23 wt% hydrocarbon-rich biofuel content. Stage I reactions (160 °C for 3 h, then 300 °C for 3 h) involving mixtures of dodecane and bio-oil (mass ratio = 3:2), hydrogen gas and 5 wt%-metal supported catalysts (Pd/C, Pt/Al2O3 Pd/Al2O3, Ru/Al2O3) suppressed char formation. Up to 80 wt% liquid organic products were obtained, with the biofuel component dominated by ketones and phenols. Significant amounts of water and gas (mainly CO2) were also produced. Stage II reactions (300 °C for 3 h; 5 wt% Pt/Al2O3; hydrogen gas) with Stage I organic liquid products gave >90 wt% of blended liquid fuel. Overall, up to 96 wt% bio-oil deoxygenation and 53.4 wt% bio-carbon retention were achieved in the final organic liquid product via a combination of various reaction mechanisms. Pt/Al2O3 catalyst deactivated via hydrolysis of alumina and coking in stage I but remained stable during Stage II.

Original language	English
Article number	129015
Number of pages	18
Journal	Fuel
Volume	352
Early online date	30 Jun 2023
DOIs	https://doi.org/10.1016/j.fuel.2023.129015
Publication status	Published - 15 Nov 2023

Bibliographical note

Copyright © 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/).

Acknowledgement: The financial support of Innovate UK for the funding of this work through the Energy Catalyst Round 7 Scheme is gratefully acknowledged. The authors would also like to thank Aston University and the Energy & Bioproducts Research Inistitute (EBRI) for all the support received.

Keywords

Intermediate pyrolysis bio-oil
Catalytic upgrading
Liquid hydrocarbon biofuel
Two-stage process
Hydrotreatment (stabilisation)
Hydrodeoxygenation

Access to Document

10.1016/j.fuel.2023.129015Licence: CC BY 4.0

Onwudili and Scaldaferri_Catalytic upgrading intermediate pyrolysis bio-oil to liquid biofuel_two-stage solvent-assisted process
Copyright © 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/)
Final published version, 3.56 MBLicence: CC BY 4.0

Cite this

@article{bb4564cf19624b229e8ab0f1a02d157b,

title = "Catalytic upgrading of intermediate pyrolysis bio-oil to hydrocarbon-rich liquid biofuel via a novel two-stage solvent-assisted process",

abstract = "A novel two-stage solvent-assisted batch catalytic hydroprocessing method has been developed for upgrading intermediate pyrolysis bio-oil to produce blended liquid fuels with ≈23 wt% hydrocarbon-rich biofuel content. Stage I reactions (160 °C for 3 h, then 300 °C for 3 h) involving mixtures of dodecane and bio-oil (mass ratio = 3:2), hydrogen gas and 5 wt%-metal supported catalysts (Pd/C, Pt/Al2O3 Pd/Al2O3, Ru/Al2O3) suppressed char formation. Up to 80 wt% liquid organic products were obtained, with the biofuel component dominated by ketones and phenols. Significant amounts of water and gas (mainly CO2) were also produced. Stage II reactions (300 °C for 3 h; 5 wt% Pt/Al2O3; hydrogen gas) with Stage I organic liquid products gave >90 wt% of blended liquid fuel. Overall, up to 96 wt% bio-oil deoxygenation and 53.4 wt% bio-carbon retention were achieved in the final organic liquid product via a combination of various reaction mechanisms. Pt/Al2O3 catalyst deactivated via hydrolysis of alumina and coking in stage I but remained stable during Stage II.",

keywords = "Intermediate pyrolysis bio-oil, Catalytic upgrading, Liquid hydrocarbon biofuel, Two-stage process, Hydrotreatment (stabilisation), Hydrodeoxygenation",

author = "Onwudili, {Jude A.} and Scaldaferri, {Cristiane A.}",

note = "Copyright {\textcopyright} 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/). Acknowledgement: The financial support of Innovate UK for the funding of this work through the Energy Catalyst Round 7 Scheme is gratefully acknowledged. The authors would also like to thank Aston University and the Energy & Bioproducts Research Inistitute (EBRI) for all the support received.",

year = "2023",

month = nov,

day = "15",

doi = "10.1016/j.fuel.2023.129015",

language = "English",

volume = "352",

journal = "Fuel",

issn = "0016-2361",

publisher = "Elsevier",

}

TY - JOUR

T1 - Catalytic upgrading of intermediate pyrolysis bio-oil to hydrocarbon-rich liquid biofuel via a novel two-stage solvent-assisted process

AU - Onwudili, Jude A.

AU - Scaldaferri, Cristiane A.

N1 - Copyright © 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/). Acknowledgement: The financial support of Innovate UK for the funding of this work through the Energy Catalyst Round 7 Scheme is gratefully acknowledged. The authors would also like to thank Aston University and the Energy & Bioproducts Research Inistitute (EBRI) for all the support received.

PY - 2023/11/15

Y1 - 2023/11/15

N2 - A novel two-stage solvent-assisted batch catalytic hydroprocessing method has been developed for upgrading intermediate pyrolysis bio-oil to produce blended liquid fuels with ≈23 wt% hydrocarbon-rich biofuel content. Stage I reactions (160 °C for 3 h, then 300 °C for 3 h) involving mixtures of dodecane and bio-oil (mass ratio = 3:2), hydrogen gas and 5 wt%-metal supported catalysts (Pd/C, Pt/Al2O3 Pd/Al2O3, Ru/Al2O3) suppressed char formation. Up to 80 wt% liquid organic products were obtained, with the biofuel component dominated by ketones and phenols. Significant amounts of water and gas (mainly CO2) were also produced. Stage II reactions (300 °C for 3 h; 5 wt% Pt/Al2O3; hydrogen gas) with Stage I organic liquid products gave >90 wt% of blended liquid fuel. Overall, up to 96 wt% bio-oil deoxygenation and 53.4 wt% bio-carbon retention were achieved in the final organic liquid product via a combination of various reaction mechanisms. Pt/Al2O3 catalyst deactivated via hydrolysis of alumina and coking in stage I but remained stable during Stage II.

AB - A novel two-stage solvent-assisted batch catalytic hydroprocessing method has been developed for upgrading intermediate pyrolysis bio-oil to produce blended liquid fuels with ≈23 wt% hydrocarbon-rich biofuel content. Stage I reactions (160 °C for 3 h, then 300 °C for 3 h) involving mixtures of dodecane and bio-oil (mass ratio = 3:2), hydrogen gas and 5 wt%-metal supported catalysts (Pd/C, Pt/Al2O3 Pd/Al2O3, Ru/Al2O3) suppressed char formation. Up to 80 wt% liquid organic products were obtained, with the biofuel component dominated by ketones and phenols. Significant amounts of water and gas (mainly CO2) were also produced. Stage II reactions (300 °C for 3 h; 5 wt% Pt/Al2O3; hydrogen gas) with Stage I organic liquid products gave >90 wt% of blended liquid fuel. Overall, up to 96 wt% bio-oil deoxygenation and 53.4 wt% bio-carbon retention were achieved in the final organic liquid product via a combination of various reaction mechanisms. Pt/Al2O3 catalyst deactivated via hydrolysis of alumina and coking in stage I but remained stable during Stage II.

KW - Intermediate pyrolysis bio-oil

KW - Catalytic upgrading

KW - Liquid hydrocarbon biofuel

KW - Two-stage process

KW - Hydrotreatment (stabilisation)

KW - Hydrodeoxygenation

UR - https://www.sciencedirect.com/science/article/pii/S0016236123016289

UR - http://www.scopus.com/inward/record.url?scp=85163868238&partnerID=8YFLogxK

U2 - 10.1016/j.fuel.2023.129015

DO - 10.1016/j.fuel.2023.129015

M3 - Article

SN - 0016-2361

VL - 352

JO - Fuel

JF - Fuel

M1 - 129015

ER -

Catalytic upgrading of intermediate pyrolysis bio-oil to hydrocarbon-rich liquid biofuel via a novel two-stage solvent-assisted process

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Cite this