New insights into the effect of pressure on catalytic hydropyrolysis of biomass

Magnus Zingler Stummann, Martin Høj, Asger Baltzer Hansen, Bente Davidsen, Peter Wiwel, Jostein Gabrielsen, Peter Arendt Jensen, Anker Degn Jensen*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Catalytic hydropyrolysis of beech wood has been conducted in a fluid bed reactor at 450 °C with a sulfided CoMo catalyst followed by a fixed bed hydrodeoxygenation (HDO) reactor with a sulfided NiMo catalyst at hydrogen pressures between 3.0 and 35.8 bar. Using both reactors the condensable organic yield (condensed organic and C4+ in gas) varied between 18.7 and 21.5 wt% dry ash free basis (daf) and was independent of the hydrogen pressure. At 15.9 bar hydrogen or higher the condensed organic phase was essentially oxygen free (<0.01 wt% dry basis (db)), but decreasing the hydrogen pressure to 3.0 bar increased the oxygen content to 7.8 wt% db. The char and coke yield was close to constant (11.0–12.7 wt% daf) at hydrogen pressures between 15.9 and 35.8 bar, but increased to 15.7 wt% at 3.0 bar hydrogen due to an increase in the polymerization of pyrolysis vapors. The measured carbon content on the spent catalysts from both the fluid bed and HDO reactor showed that coking of the catalysts increased when the hydrogen pressure was decreased below 15.9 bar. The increased coking at low hydrogen pressure (<15.9 bar) was ascribed to the polymerization of the more reactive oxygenates produced in the fluid bed reactor.
Original languageEnglish
JournalFuel Processing Technology
Volume193
Pages (from-to)392-403
ISSN0378-3820
DOIs
Publication statusPublished - 2019

Keywords

  • Catalytic hydropyrolysis
  • Deactivation
  • Biofuel
  • Low pressure
  • Hydrodeoxygenation
  • Oil characterization

Cite this

Stummann, Magnus Zingler ; Høj, Martin ; Hansen, Asger Baltzer ; Davidsen, Bente ; Wiwel, Peter ; Gabrielsen, Jostein ; Jensen, Peter Arendt ; Jensen, Anker Degn. / New insights into the effect of pressure on catalytic hydropyrolysis of biomass. In: Fuel Processing Technology. 2019 ; Vol. 193. pp. 392-403.
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abstract = "Catalytic hydropyrolysis of beech wood has been conducted in a fluid bed reactor at 450 °C with a sulfided CoMo catalyst followed by a fixed bed hydrodeoxygenation (HDO) reactor with a sulfided NiMo catalyst at hydrogen pressures between 3.0 and 35.8 bar. Using both reactors the condensable organic yield (condensed organic and C4+ in gas) varied between 18.7 and 21.5 wt{\%} dry ash free basis (daf) and was independent of the hydrogen pressure. At 15.9 bar hydrogen or higher the condensed organic phase was essentially oxygen free (<0.01 wt{\%} dry basis (db)), but decreasing the hydrogen pressure to 3.0 bar increased the oxygen content to 7.8 wt{\%} db. The char and coke yield was close to constant (11.0–12.7 wt{\%} daf) at hydrogen pressures between 15.9 and 35.8 bar, but increased to 15.7 wt{\%} at 3.0 bar hydrogen due to an increase in the polymerization of pyrolysis vapors. The measured carbon content on the spent catalysts from both the fluid bed and HDO reactor showed that coking of the catalysts increased when the hydrogen pressure was decreased below 15.9 bar. The increased coking at low hydrogen pressure (<15.9 bar) was ascribed to the polymerization of the more reactive oxygenates produced in the fluid bed reactor.",
keywords = "Catalytic hydropyrolysis, Deactivation, Biofuel, Low pressure, Hydrodeoxygenation, Oil characterization",
author = "Stummann, {Magnus Zingler} and Martin H{\o}j and Hansen, {Asger Baltzer} and Bente Davidsen and Peter Wiwel and Jostein Gabrielsen and Jensen, {Peter Arendt} and Jensen, {Anker Degn}",
year = "2019",
doi = "10.1016/j.fuproc.2019.05.037",
language = "English",
volume = "193",
pages = "392--403",
journal = "Fuel Processing Technology",
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New insights into the effect of pressure on catalytic hydropyrolysis of biomass. / Stummann, Magnus Zingler; Høj, Martin; Hansen, Asger Baltzer; Davidsen, Bente; Wiwel, Peter; Gabrielsen, Jostein; Jensen, Peter Arendt; Jensen, Anker Degn.

In: Fuel Processing Technology, Vol. 193, 2019, p. 392-403.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - New insights into the effect of pressure on catalytic hydropyrolysis of biomass

AU - Stummann, Magnus Zingler

AU - Høj, Martin

AU - Hansen, Asger Baltzer

AU - Davidsen, Bente

AU - Wiwel, Peter

AU - Gabrielsen, Jostein

AU - Jensen, Peter Arendt

AU - Jensen, Anker Degn

PY - 2019

Y1 - 2019

N2 - Catalytic hydropyrolysis of beech wood has been conducted in a fluid bed reactor at 450 °C with a sulfided CoMo catalyst followed by a fixed bed hydrodeoxygenation (HDO) reactor with a sulfided NiMo catalyst at hydrogen pressures between 3.0 and 35.8 bar. Using both reactors the condensable organic yield (condensed organic and C4+ in gas) varied between 18.7 and 21.5 wt% dry ash free basis (daf) and was independent of the hydrogen pressure. At 15.9 bar hydrogen or higher the condensed organic phase was essentially oxygen free (<0.01 wt% dry basis (db)), but decreasing the hydrogen pressure to 3.0 bar increased the oxygen content to 7.8 wt% db. The char and coke yield was close to constant (11.0–12.7 wt% daf) at hydrogen pressures between 15.9 and 35.8 bar, but increased to 15.7 wt% at 3.0 bar hydrogen due to an increase in the polymerization of pyrolysis vapors. The measured carbon content on the spent catalysts from both the fluid bed and HDO reactor showed that coking of the catalysts increased when the hydrogen pressure was decreased below 15.9 bar. The increased coking at low hydrogen pressure (<15.9 bar) was ascribed to the polymerization of the more reactive oxygenates produced in the fluid bed reactor.

AB - Catalytic hydropyrolysis of beech wood has been conducted in a fluid bed reactor at 450 °C with a sulfided CoMo catalyst followed by a fixed bed hydrodeoxygenation (HDO) reactor with a sulfided NiMo catalyst at hydrogen pressures between 3.0 and 35.8 bar. Using both reactors the condensable organic yield (condensed organic and C4+ in gas) varied between 18.7 and 21.5 wt% dry ash free basis (daf) and was independent of the hydrogen pressure. At 15.9 bar hydrogen or higher the condensed organic phase was essentially oxygen free (<0.01 wt% dry basis (db)), but decreasing the hydrogen pressure to 3.0 bar increased the oxygen content to 7.8 wt% db. The char and coke yield was close to constant (11.0–12.7 wt% daf) at hydrogen pressures between 15.9 and 35.8 bar, but increased to 15.7 wt% at 3.0 bar hydrogen due to an increase in the polymerization of pyrolysis vapors. The measured carbon content on the spent catalysts from both the fluid bed and HDO reactor showed that coking of the catalysts increased when the hydrogen pressure was decreased below 15.9 bar. The increased coking at low hydrogen pressure (<15.9 bar) was ascribed to the polymerization of the more reactive oxygenates produced in the fluid bed reactor.

KW - Catalytic hydropyrolysis

KW - Deactivation

KW - Biofuel

KW - Low pressure

KW - Hydrodeoxygenation

KW - Oil characterization

U2 - 10.1016/j.fuproc.2019.05.037

DO - 10.1016/j.fuproc.2019.05.037

M3 - Journal article

VL - 193

SP - 392

EP - 403

JO - Fuel Processing Technology

JF - Fuel Processing Technology

SN - 0378-3820

ER -