Hydrogen assisted catalytic biomass pyrolysis for green fuels

Magnus Zingler Stummann, Martin Høj, Christian Bækhøj Schandel, A. B. Hansen, P. Wiwel, Peter Arendt Jensen, J. Gabrielsen, Anker Degn Jensen

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

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Abstract

Fast pyrolysis of biomass is a well-known technology for producing bio-oil, however in order to use the oil as transportation fuel the oxygen content must be decreased from approximately 30 wt.% to below 1 wt.%. This can be achieved by catalytic hydrodeoxygenation (HDO). Unfortunately, deactivation due to coking of the catalyst is an inhibitive problem for this technology. The objective of the present work is to produce oxygen free gasoline and diesel from biomass by hydrogen assisted catalytic fast pyrolysis. Fast pyrolysis of beech wood has been performed in high-pressure hydrogen atmosphere in a fluid bed reactor with a commercial CoMoS/MgAl2O4 catalyst as bed medium followed by an additional vapor phase, fixed bed HDO reactor using a commercial NiMoS/Al2O3 catalyst .The obtained bio-oil is essentially oxygen free. Oxygen specific GC-AED showed only traces of phenols, benzofurans and napthols (< few ppm) as the remaining oxygenates. The temperature in the fluid bed reactor has been varied between 365 and 470 oC and pressure has been varied between 15 and 35 barg in order to investigate the impact on yields and oil composition. The char yield decreased with increasing temperature and decreasing pressure. Increasing the pressure also increased the water yield and decreased the CO/CO2 yield, indicating that the reaction pathway for the oxygen removal is highly pressure dependent. GCxGC-FID analysis of the condensed oil product showed a chromatic area up to 79 % for aromatics, indicating that the aromatic content in the oil is equilibrium controlled. Elemental analysis showed that the oxygen content in the char decreased with increasing temperature in the fluid bed reactor. Oil yields of up to 21.6 wt.% were obtained, corresponding to an energy recovery of 51 %. An experiment without the HDO reactor showed that most oxygen is removed in the fluid bed reactor.
Original languageEnglish
Publication date2017
Number of pages2
Publication statusPublished - 2017
EventTCbiomass 2017: The Global Future of Bioenergy - Chicago, United States
Duration: 19 Sep 201721 Sep 2017
http://www.gastechnology.org/tcbiomass/Pages/default.aspx

Conference

ConferenceTCbiomass 2017
CountryUnited States
CityChicago
Period19/09/201721/09/2017
Internet address

Cite this

Stummann, M. Z., Høj, M., Schandel, C. B., Hansen, A. B., Wiwel, P., Jensen, P. A., ... Jensen, A. D. (2017). Hydrogen assisted catalytic biomass pyrolysis for green fuels. Abstract from TCbiomass 2017, Chicago, United States.
Stummann, Magnus Zingler ; Høj, Martin ; Schandel, Christian Bækhøj ; Hansen, A. B. ; Wiwel, P. ; Jensen, Peter Arendt ; Gabrielsen, J. ; Jensen, Anker Degn. / Hydrogen assisted catalytic biomass pyrolysis for green fuels. Abstract from TCbiomass 2017, Chicago, United States.2 p.
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title = "Hydrogen assisted catalytic biomass pyrolysis for green fuels",
abstract = "Fast pyrolysis of biomass is a well-known technology for producing bio-oil, however in order to use the oil as transportation fuel the oxygen content must be decreased from approximately 30 wt.{\%} to below 1 wt.{\%}. This can be achieved by catalytic hydrodeoxygenation (HDO). Unfortunately, deactivation due to coking of the catalyst is an inhibitive problem for this technology. The objective of the present work is to produce oxygen free gasoline and diesel from biomass by hydrogen assisted catalytic fast pyrolysis. Fast pyrolysis of beech wood has been performed in high-pressure hydrogen atmosphere in a fluid bed reactor with a commercial CoMoS/MgAl2O4 catalyst as bed medium followed by an additional vapor phase, fixed bed HDO reactor using a commercial NiMoS/Al2O3 catalyst .The obtained bio-oil is essentially oxygen free. Oxygen specific GC-AED showed only traces of phenols, benzofurans and napthols (< few ppm) as the remaining oxygenates. The temperature in the fluid bed reactor has been varied between 365 and 470 oC and pressure has been varied between 15 and 35 barg in order to investigate the impact on yields and oil composition. The char yield decreased with increasing temperature and decreasing pressure. Increasing the pressure also increased the water yield and decreased the CO/CO2 yield, indicating that the reaction pathway for the oxygen removal is highly pressure dependent. GCxGC-FID analysis of the condensed oil product showed a chromatic area up to 79 {\%} for aromatics, indicating that the aromatic content in the oil is equilibrium controlled. Elemental analysis showed that the oxygen content in the char decreased with increasing temperature in the fluid bed reactor. Oil yields of up to 21.6 wt.{\%} were obtained, corresponding to an energy recovery of 51 {\%}. An experiment without the HDO reactor showed that most oxygen is removed in the fluid bed reactor.",
author = "Stummann, {Magnus Zingler} and Martin H{\o}j and Schandel, {Christian B{\ae}kh{\o}j} and Hansen, {A. B.} and P. Wiwel and Jensen, {Peter Arendt} and J. Gabrielsen and Jensen, {Anker Degn}",
year = "2017",
language = "English",
note = "null ; Conference date: 19-09-2017 Through 21-09-2017",
url = "http://www.gastechnology.org/tcbiomass/Pages/default.aspx",

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Stummann, MZ, Høj, M, Schandel, CB, Hansen, AB, Wiwel, P, Jensen, PA, Gabrielsen, J & Jensen, AD 2017, 'Hydrogen assisted catalytic biomass pyrolysis for green fuels', TCbiomass 2017, Chicago, United States, 19/09/2017 - 21/09/2017.

Hydrogen assisted catalytic biomass pyrolysis for green fuels. / Stummann, Magnus Zingler; Høj, Martin; Schandel, Christian Bækhøj; Hansen, A. B. ; Wiwel, P.; Jensen, Peter Arendt; Gabrielsen, J.; Jensen, Anker Degn.

2017. Abstract from TCbiomass 2017, Chicago, United States.

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

TY - ABST

T1 - Hydrogen assisted catalytic biomass pyrolysis for green fuels

AU - Stummann, Magnus Zingler

AU - Høj, Martin

AU - Schandel, Christian Bækhøj

AU - Hansen, A. B.

AU - Wiwel, P.

AU - Jensen, Peter Arendt

AU - Gabrielsen, J.

AU - Jensen, Anker Degn

PY - 2017

Y1 - 2017

N2 - Fast pyrolysis of biomass is a well-known technology for producing bio-oil, however in order to use the oil as transportation fuel the oxygen content must be decreased from approximately 30 wt.% to below 1 wt.%. This can be achieved by catalytic hydrodeoxygenation (HDO). Unfortunately, deactivation due to coking of the catalyst is an inhibitive problem for this technology. The objective of the present work is to produce oxygen free gasoline and diesel from biomass by hydrogen assisted catalytic fast pyrolysis. Fast pyrolysis of beech wood has been performed in high-pressure hydrogen atmosphere in a fluid bed reactor with a commercial CoMoS/MgAl2O4 catalyst as bed medium followed by an additional vapor phase, fixed bed HDO reactor using a commercial NiMoS/Al2O3 catalyst .The obtained bio-oil is essentially oxygen free. Oxygen specific GC-AED showed only traces of phenols, benzofurans and napthols (< few ppm) as the remaining oxygenates. The temperature in the fluid bed reactor has been varied between 365 and 470 oC and pressure has been varied between 15 and 35 barg in order to investigate the impact on yields and oil composition. The char yield decreased with increasing temperature and decreasing pressure. Increasing the pressure also increased the water yield and decreased the CO/CO2 yield, indicating that the reaction pathway for the oxygen removal is highly pressure dependent. GCxGC-FID analysis of the condensed oil product showed a chromatic area up to 79 % for aromatics, indicating that the aromatic content in the oil is equilibrium controlled. Elemental analysis showed that the oxygen content in the char decreased with increasing temperature in the fluid bed reactor. Oil yields of up to 21.6 wt.% were obtained, corresponding to an energy recovery of 51 %. An experiment without the HDO reactor showed that most oxygen is removed in the fluid bed reactor.

AB - Fast pyrolysis of biomass is a well-known technology for producing bio-oil, however in order to use the oil as transportation fuel the oxygen content must be decreased from approximately 30 wt.% to below 1 wt.%. This can be achieved by catalytic hydrodeoxygenation (HDO). Unfortunately, deactivation due to coking of the catalyst is an inhibitive problem for this technology. The objective of the present work is to produce oxygen free gasoline and diesel from biomass by hydrogen assisted catalytic fast pyrolysis. Fast pyrolysis of beech wood has been performed in high-pressure hydrogen atmosphere in a fluid bed reactor with a commercial CoMoS/MgAl2O4 catalyst as bed medium followed by an additional vapor phase, fixed bed HDO reactor using a commercial NiMoS/Al2O3 catalyst .The obtained bio-oil is essentially oxygen free. Oxygen specific GC-AED showed only traces of phenols, benzofurans and napthols (< few ppm) as the remaining oxygenates. The temperature in the fluid bed reactor has been varied between 365 and 470 oC and pressure has been varied between 15 and 35 barg in order to investigate the impact on yields and oil composition. The char yield decreased with increasing temperature and decreasing pressure. Increasing the pressure also increased the water yield and decreased the CO/CO2 yield, indicating that the reaction pathway for the oxygen removal is highly pressure dependent. GCxGC-FID analysis of the condensed oil product showed a chromatic area up to 79 % for aromatics, indicating that the aromatic content in the oil is equilibrium controlled. Elemental analysis showed that the oxygen content in the char decreased with increasing temperature in the fluid bed reactor. Oil yields of up to 21.6 wt.% were obtained, corresponding to an energy recovery of 51 %. An experiment without the HDO reactor showed that most oxygen is removed in the fluid bed reactor.

M3 - Conference abstract for conference

ER -

Stummann MZ, Høj M, Schandel CB, Hansen AB, Wiwel P, Jensen PA et al. Hydrogen assisted catalytic biomass pyrolysis for green fuels. 2017. Abstract from TCbiomass 2017, Chicago, United States.