Upgrading of fast pyrolysis oil via catalytic hydrodeoxygenation: Effects of type of solvents

Shima Ahmadi; Ehsan Reyhanitash; Zhongshun Yuan; Sohrab Rohani; Chunbao (Charles) Xu

doi:10.1016/j.renene.2017.07.041

Upgrading of fast pyrolysis oil via catalytic hydrodeoxygenation: Effects of type of solvents

Shima Ahmadi, Ehsan Reyhanitash, Zhongshun Yuan, Sohrab Rohani, Chunbao (Charles) Xu^*

^*Corresponding author for this work

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

14 Citations (Scopus)

Abstract

Effects of type of solvents (hydro-treated bio-oil and ethanol) and temperature (300 and 350 °C) on hydrodeoxygenation (HDO) of fast pyrolysis oil (PO) were studied. The presence of a solvent effectively reduced self-polymerization of the intermediates during the bio-oil HDO process. HDO of PO using hydro-treated oil as the solvent produced higher yields of oil fraction (OF) and consumed more H₂ than those with ethanol. While the OF yields from all the HDO experiments ranged from 60 to 90 wt%, the highest OF yield was obtained using hydro-treated bio-oil as the solvent. Nevertheless, HDO of PO in ethanol is more promising as it improves the HHV (higher heating value) of the bio-oil substantially (from 21 to 38 MJ/kg), reduces the molecular weight of bio-oil, and the resulted OFs have the lowest O/C value (0.08). HDO upgrading of bio-oil in ethanol has similar effects as HDO operation at a higher temperature (350 °C) without solvent with respect to molar mass reduction for the bio-oil.

Original language	English
Pages (from-to)	376-382
Number of pages	7
Journal	Renewable energy
Volume	114
DOIs	https://doi.org/10.1016/j.renene.2017.07.041
Publication status	Published - 1 Dec 2017
Externally published	Yes

Keywords

Ethanol solvent
Fast pyrolysis oil
Hydro-treated bio-oil solvent
Hydrodeoxygenation (HDO)
Ru/C catalyst
Upgrading

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title = "Upgrading of fast pyrolysis oil via catalytic hydrodeoxygenation: Effects of type of solvents",

abstract = "Effects of type of solvents (hydro-treated bio-oil and ethanol) and temperature (300 and 350 °C) on hydrodeoxygenation (HDO) of fast pyrolysis oil (PO) were studied. The presence of a solvent effectively reduced self-polymerization of the intermediates during the bio-oil HDO process. HDO of PO using hydro-treated oil as the solvent produced higher yields of oil fraction (OF) and consumed more H2 than those with ethanol. While the OF yields from all the HDO experiments ranged from 60 to 90 wt%, the highest OF yield was obtained using hydro-treated bio-oil as the solvent. Nevertheless, HDO of PO in ethanol is more promising as it improves the HHV (higher heating value) of the bio-oil substantially (from 21 to 38 MJ/kg), reduces the molecular weight of bio-oil, and the resulted OFs have the lowest O/C value (0.08). HDO upgrading of bio-oil in ethanol has similar effects as HDO operation at a higher temperature (350 °C) without solvent with respect to molar mass reduction for the bio-oil.",

keywords = "Ethanol solvent, Fast pyrolysis oil, Hydro-treated bio-oil solvent, Hydrodeoxygenation (HDO), Ru/C catalyst, Upgrading",

author = "Shima Ahmadi and Ehsan Reyhanitash and Zhongshun Yuan and Sohrab Rohani and Xu, {Chunbao (Charles)}",

year = "2017",

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doi = "10.1016/j.renene.2017.07.041",

language = "English",

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T2 - Effects of type of solvents

AU - Ahmadi, Shima

AU - Reyhanitash, Ehsan

AU - Yuan, Zhongshun

AU - Rohani, Sohrab

AU - Xu, Chunbao (Charles)

PY - 2017/12/1

Y1 - 2017/12/1

N2 - Effects of type of solvents (hydro-treated bio-oil and ethanol) and temperature (300 and 350 °C) on hydrodeoxygenation (HDO) of fast pyrolysis oil (PO) were studied. The presence of a solvent effectively reduced self-polymerization of the intermediates during the bio-oil HDO process. HDO of PO using hydro-treated oil as the solvent produced higher yields of oil fraction (OF) and consumed more H2 than those with ethanol. While the OF yields from all the HDO experiments ranged from 60 to 90 wt%, the highest OF yield was obtained using hydro-treated bio-oil as the solvent. Nevertheless, HDO of PO in ethanol is more promising as it improves the HHV (higher heating value) of the bio-oil substantially (from 21 to 38 MJ/kg), reduces the molecular weight of bio-oil, and the resulted OFs have the lowest O/C value (0.08). HDO upgrading of bio-oil in ethanol has similar effects as HDO operation at a higher temperature (350 °C) without solvent with respect to molar mass reduction for the bio-oil.

AB - Effects of type of solvents (hydro-treated bio-oil and ethanol) and temperature (300 and 350 °C) on hydrodeoxygenation (HDO) of fast pyrolysis oil (PO) were studied. The presence of a solvent effectively reduced self-polymerization of the intermediates during the bio-oil HDO process. HDO of PO using hydro-treated oil as the solvent produced higher yields of oil fraction (OF) and consumed more H2 than those with ethanol. While the OF yields from all the HDO experiments ranged from 60 to 90 wt%, the highest OF yield was obtained using hydro-treated bio-oil as the solvent. Nevertheless, HDO of PO in ethanol is more promising as it improves the HHV (higher heating value) of the bio-oil substantially (from 21 to 38 MJ/kg), reduces the molecular weight of bio-oil, and the resulted OFs have the lowest O/C value (0.08). HDO upgrading of bio-oil in ethanol has similar effects as HDO operation at a higher temperature (350 °C) without solvent with respect to molar mass reduction for the bio-oil.

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KW - Hydrodeoxygenation (HDO)

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KW - Upgrading

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