Abstract
Conversion of biomass into clean syngas was studied considering application of low-grade iron ore to reforming of tar. Chipped cedar with moisture content of 0.1-10.1 wt% was continuously pyrolysed at 550 °C, and the nascent volatiles were subjected to reforming at 690-800 °C in a bed of mesoporous hematite derived from a type of natural goethite. The yield of heavy tar (b.p. > 350 °C) decreased from 18.8 to less than 0.01 wt% during the reforming mainly by its oxidation by the ore and conversion into coke. The hematite was reduced completely to magnetite and further but incompletely to wustite. The formation of iron was inhibited by high CO2/CO and H 2O/H2 ratios of the gas phase. The coke-loaded magnetite/wustite mixture was, however, an excellent precursor of iron. Reheating the spent ore up to 800 °C in the absence of the volatiles reduced the magnetite/wustite to wustite/iron obeying direct and indirect reduction mechanisms. Repeated cycles of such reheating and reforming converted the volatiles and ore into syngas with a total tar concentration as low as 10 mg Nm-3-dry and coke-loaded iron, respectively. Contribution of the steam reforming with iron-wustite redox cycles became more important as the reforming-reheating cycles were repeated.
| Original language | English |
|---|---|
| Pages (from-to) | 64-72 |
| Number of pages | 9 |
| Journal | Fuel |
| Volume | 103 |
| DOIs | |
| Publication status | Published - Jan 1 2013 |
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All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Fuel Technology
- Energy Engineering and Power Technology
- Organic Chemistry
Cite this
Coproduction of clean syngas and iron from woody biomass and natural goethite ore. / Kudo, Shinji; Sugiyama, Keigo; Norinaga, Koyo; Li, Chun Zhu; Akiyama, Tomohiro; Hayashi, Jun Ichiro.
In: Fuel, Vol. 103, 01.01.2013, p. 64-72.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Coproduction of clean syngas and iron from woody biomass and natural goethite ore
AU - Kudo, Shinji
AU - Sugiyama, Keigo
AU - Norinaga, Koyo
AU - Li, Chun Zhu
AU - Akiyama, Tomohiro
AU - Hayashi, Jun Ichiro
PY - 2013/1/1
Y1 - 2013/1/1
N2 - Conversion of biomass into clean syngas was studied considering application of low-grade iron ore to reforming of tar. Chipped cedar with moisture content of 0.1-10.1 wt% was continuously pyrolysed at 550 °C, and the nascent volatiles were subjected to reforming at 690-800 °C in a bed of mesoporous hematite derived from a type of natural goethite. The yield of heavy tar (b.p. > 350 °C) decreased from 18.8 to less than 0.01 wt% during the reforming mainly by its oxidation by the ore and conversion into coke. The hematite was reduced completely to magnetite and further but incompletely to wustite. The formation of iron was inhibited by high CO2/CO and H 2O/H2 ratios of the gas phase. The coke-loaded magnetite/wustite mixture was, however, an excellent precursor of iron. Reheating the spent ore up to 800 °C in the absence of the volatiles reduced the magnetite/wustite to wustite/iron obeying direct and indirect reduction mechanisms. Repeated cycles of such reheating and reforming converted the volatiles and ore into syngas with a total tar concentration as low as 10 mg Nm-3-dry and coke-loaded iron, respectively. Contribution of the steam reforming with iron-wustite redox cycles became more important as the reforming-reheating cycles were repeated.
AB - Conversion of biomass into clean syngas was studied considering application of low-grade iron ore to reforming of tar. Chipped cedar with moisture content of 0.1-10.1 wt% was continuously pyrolysed at 550 °C, and the nascent volatiles were subjected to reforming at 690-800 °C in a bed of mesoporous hematite derived from a type of natural goethite. The yield of heavy tar (b.p. > 350 °C) decreased from 18.8 to less than 0.01 wt% during the reforming mainly by its oxidation by the ore and conversion into coke. The hematite was reduced completely to magnetite and further but incompletely to wustite. The formation of iron was inhibited by high CO2/CO and H 2O/H2 ratios of the gas phase. The coke-loaded magnetite/wustite mixture was, however, an excellent precursor of iron. Reheating the spent ore up to 800 °C in the absence of the volatiles reduced the magnetite/wustite to wustite/iron obeying direct and indirect reduction mechanisms. Repeated cycles of such reheating and reforming converted the volatiles and ore into syngas with a total tar concentration as low as 10 mg Nm-3-dry and coke-loaded iron, respectively. Contribution of the steam reforming with iron-wustite redox cycles became more important as the reforming-reheating cycles were repeated.
UR - http://www.scopus.com/inward/record.url?scp=84870499124&partnerID=8YFLogxK
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U2 - 10.1016/j.fuel.2011.06.074
DO - 10.1016/j.fuel.2011.06.074
M3 - Article
AN - SCOPUS:84870499124
VL - 103
SP - 64
EP - 72
JO - Fuel
JF - Fuel
SN - 0016-2361
ER -