TY - GEN
T1 - N-Doped Biochar as H2S Adsorbent for Biogas-Fueled SOFC
AU - Setiawan, H.
AU - Sakamoto, M.
AU - Fujisaki, T.
AU - Shiratori, Y.
N1 - Funding Information:
This work was supported by JSPS KAKENHI, Fostering Joint International Research (B), Grant Number 20KK0248.
Publisher Copyright:
© 2021 Electrochemical Society Inc.. All rights reserved.
PY - 2021
Y1 - 2021
N2 - To prevent performance degradation of biogas-fueled SOFC caused by H2S poisoning, this study aimed to develop a nitrogen (N)-doped carbon derived from biomass feedstock, which acted as an adsorbent of H2S. Biochar (BC) derived from rice husk (RH) treated with 25 vol% NH3gas at 900°C for 120 min, exhibited the largest H2S breakthrough capacity (ACPH2S(0)) of 8.02 mg H2S g- BC-1 and a total H2S adsorption capacity (ACPH2S) of 9.58 mg H2S g-BC-1. The largest ACPH2S, 23.0 mg H2S g-BC-1, was obtained for the RH-BC treated with NH3evaporated from a 10 wt% NH3solution (simulating a concentrated digested liquid) at 850°C for 270 min. For a mildly N-doped BC, the interaction of the surface with H2S was moderately weakened, preventing the blockage of micropore openings by the accumulation of sulfate. Consequently, the H2S molecules could be adsorbed into the micropores, resulting in a higher ACPH2S
AB - To prevent performance degradation of biogas-fueled SOFC caused by H2S poisoning, this study aimed to develop a nitrogen (N)-doped carbon derived from biomass feedstock, which acted as an adsorbent of H2S. Biochar (BC) derived from rice husk (RH) treated with 25 vol% NH3gas at 900°C for 120 min, exhibited the largest H2S breakthrough capacity (ACPH2S(0)) of 8.02 mg H2S g- BC-1 and a total H2S adsorption capacity (ACPH2S) of 9.58 mg H2S g-BC-1. The largest ACPH2S, 23.0 mg H2S g-BC-1, was obtained for the RH-BC treated with NH3evaporated from a 10 wt% NH3solution (simulating a concentrated digested liquid) at 850°C for 270 min. For a mildly N-doped BC, the interaction of the surface with H2S was moderately weakened, preventing the blockage of micropore openings by the accumulation of sulfate. Consequently, the H2S molecules could be adsorbed into the micropores, resulting in a higher ACPH2S
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U2 - 10.1149/10301.1165ecst
DO - 10.1149/10301.1165ecst
M3 - Conference contribution
AN - SCOPUS:85111640674
T3 - ECS Transactions
SP - 1165
EP - 1176
BT - 17th International Symposium on Solid Oxide Fuel Cells, SOFC 2021
PB - IOP Publishing Ltd.
T2 - 17th International Symposium on Solid Oxide Fuel Cells, SOFC 2021
Y2 - 18 July 2021 through 23 July 2021
ER -