Abstract
Tar formation during biomass gasification has remained a major challenge. Using acetol and guaiacol as model tar compounds from cellulose and lignin, respectively, in-situ tar conversion into synthesis gas (H2 and CO) was studied using a Rh–Ni/Al2O3 catalyst under reactive flash volatilization conditions. The influence of operating conditions, including temperature, steam-to-carbon molar ratio (S/C), carbon-to-oxygen molar ratio (C/O), gas hourly space velocity (GHSV), and catalyst weight, on the H2/CO molar ratio in the product gas were experimentally examined. The contribution of non-catalytic thermal oxidation on overall conversion was also measured by varying the distance between the catalyst bed and the feeding point position. In the case of acetol reforming at 650 °C, more than 60% of the carbon in the feed was converted via thermal oxidation into permanent gases before reaching the catalytic bed. Moreover, a minimum reaction temperature of 500 °C was necessary to avoid coke formation and the optimal operating conditions for reforming of acetol were 650 °C, C/O = 1.7, S/C = 1.2, and atmospheric pressure. Likewise, for guaiacol, the minimum operating temperature of 600 °C was required. By using two pure components, this study has provided insight into how reactive flash volatilization generates tar-free synthesis gas.
| Original language | English |
|---|---|
| Pages (from-to) | 1180-1187 |
| Number of pages | 8 |
| Journal | Renewable Energy |
| Volume | 147 |
| Issue number | Part 1 |
| DOIs | |
| Publication status | Published - 1 Mar 2020 |
Keywords
- Acetol
- Guaiacol
- Reaction kinetics
- Reactive flash volatilization
- Reforming
Cite this
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In-situ reforming of biomass primary tars via reactive flash volatilization. / Ahmed, Tigabwa Y.; Hoadley, Andrew F.A.; Tanksale, Akshat.
In: Renewable Energy, Vol. 147, No. Part 1, 01.03.2020, p. 1180-1187.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - In-situ reforming of biomass primary tars via reactive flash volatilization
AU - Ahmed, Tigabwa Y.
AU - Hoadley, Andrew F.A.
AU - Tanksale, Akshat
PY - 2020/3/1
Y1 - 2020/3/1
N2 - Tar formation during biomass gasification has remained a major challenge. Using acetol and guaiacol as model tar compounds from cellulose and lignin, respectively, in-situ tar conversion into synthesis gas (H2 and CO) was studied using a Rh–Ni/Al2O3 catalyst under reactive flash volatilization conditions. The influence of operating conditions, including temperature, steam-to-carbon molar ratio (S/C), carbon-to-oxygen molar ratio (C/O), gas hourly space velocity (GHSV), and catalyst weight, on the H2/CO molar ratio in the product gas were experimentally examined. The contribution of non-catalytic thermal oxidation on overall conversion was also measured by varying the distance between the catalyst bed and the feeding point position. In the case of acetol reforming at 650 °C, more than 60% of the carbon in the feed was converted via thermal oxidation into permanent gases before reaching the catalytic bed. Moreover, a minimum reaction temperature of 500 °C was necessary to avoid coke formation and the optimal operating conditions for reforming of acetol were 650 °C, C/O = 1.7, S/C = 1.2, and atmospheric pressure. Likewise, for guaiacol, the minimum operating temperature of 600 °C was required. By using two pure components, this study has provided insight into how reactive flash volatilization generates tar-free synthesis gas.
AB - Tar formation during biomass gasification has remained a major challenge. Using acetol and guaiacol as model tar compounds from cellulose and lignin, respectively, in-situ tar conversion into synthesis gas (H2 and CO) was studied using a Rh–Ni/Al2O3 catalyst under reactive flash volatilization conditions. The influence of operating conditions, including temperature, steam-to-carbon molar ratio (S/C), carbon-to-oxygen molar ratio (C/O), gas hourly space velocity (GHSV), and catalyst weight, on the H2/CO molar ratio in the product gas were experimentally examined. The contribution of non-catalytic thermal oxidation on overall conversion was also measured by varying the distance between the catalyst bed and the feeding point position. In the case of acetol reforming at 650 °C, more than 60% of the carbon in the feed was converted via thermal oxidation into permanent gases before reaching the catalytic bed. Moreover, a minimum reaction temperature of 500 °C was necessary to avoid coke formation and the optimal operating conditions for reforming of acetol were 650 °C, C/O = 1.7, S/C = 1.2, and atmospheric pressure. Likewise, for guaiacol, the minimum operating temperature of 600 °C was required. By using two pure components, this study has provided insight into how reactive flash volatilization generates tar-free synthesis gas.
KW - Acetol
KW - Guaiacol
KW - Reaction kinetics
KW - Reactive flash volatilization
KW - Reforming
UR - http://www.scopus.com/inward/record.url?scp=85072386949&partnerID=8YFLogxK
U2 - 10.1016/j.renene.2019.09.051
DO - 10.1016/j.renene.2019.09.051
M3 - Article
VL - 147
SP - 1180
EP - 1187
JO - Renewable Energy
JF - Renewable Energy
SN - 0960-1481
IS - Part 1
ER -