TY - JOUR
T1 - Auto-thermal reforming of acetic acid for hydrogen production by ordered mesoporous Ni-xSm-Al-O catalysts: Effect of samarium promotion
AU - Zhou, Qing
AU - Zhong, Xinyan
AU - Xie, Xingyue
AU - Jia, Xuanyi
AU - Chen, Baiquan
AU - Wang, Ning
AU - Huang, Lihong
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This study was financially supported by National Natural Science Foundation of China (21276031 and 21506111), and Sichuan Science and Technology Program sponsored by S & T Department of Sichuan Province of China (2015HH0013 and 2019YFH0181).
PY - 2019/7/18
Y1 - 2019/7/18
N2 - Biomass-derived acetic acid (HAc), as a hydrogen storage medium, can be transformed to hydrogen via on-board reformer for fuel cells. Steam reforming (SR) of HAc is a traditional hydrogen production process, but endothermicity of SR is a concern for heat management in dynamic on-board application. Auto-thermal reforming (ATR) of HAc is a promising route, while catalyst deactivation in harsh ATR atmosphere should be addressed. Samarium-promoted ordered mesoporous Ni-xSm-Al-O catalysts were synthesized via improved evaporation-induced self-assembly (EISA) method, and tested in ATR of HAc for hydrogen production. The Ni-2Sm-Al-O catalyst produced a stable HAc conversion near 100.0% and a hydrogen yield at 2.6 mol-H2/mol-HAc in a 30-h test. Meanwhile, the Ni-2Sm-Al-O catalyst shows resistance to oxidation, sintering and coking; this improved reactivity and durability can be attributed to basic Sm oxides and ordered mesoporous framework with confinement effect: the basic sites are beneficial to adsorption and activation of HAc, and the ordered mesoporous framework constrains the thermal agglutination of Ni metal and formation of coking, while intermediate carbonous species of *CHx (x = 0–3) can be gasified via the Sm2O3-Sm2O2CO3 cycle. These Sm-promoted Ni-based catalysts are also tested with different temperatures and O/C, and show potentials in ATR of HAc for hydrogen production.
AB - Biomass-derived acetic acid (HAc), as a hydrogen storage medium, can be transformed to hydrogen via on-board reformer for fuel cells. Steam reforming (SR) of HAc is a traditional hydrogen production process, but endothermicity of SR is a concern for heat management in dynamic on-board application. Auto-thermal reforming (ATR) of HAc is a promising route, while catalyst deactivation in harsh ATR atmosphere should be addressed. Samarium-promoted ordered mesoporous Ni-xSm-Al-O catalysts were synthesized via improved evaporation-induced self-assembly (EISA) method, and tested in ATR of HAc for hydrogen production. The Ni-2Sm-Al-O catalyst produced a stable HAc conversion near 100.0% and a hydrogen yield at 2.6 mol-H2/mol-HAc in a 30-h test. Meanwhile, the Ni-2Sm-Al-O catalyst shows resistance to oxidation, sintering and coking; this improved reactivity and durability can be attributed to basic Sm oxides and ordered mesoporous framework with confinement effect: the basic sites are beneficial to adsorption and activation of HAc, and the ordered mesoporous framework constrains the thermal agglutination of Ni metal and formation of coking, while intermediate carbonous species of *CHx (x = 0–3) can be gasified via the Sm2O3-Sm2O2CO3 cycle. These Sm-promoted Ni-based catalysts are also tested with different temperatures and O/C, and show potentials in ATR of HAc for hydrogen production.
UR - http://hdl.handle.net/10754/656771
UR - https://linkinghub.elsevier.com/retrieve/pii/S0960148119310985
UR - http://www.scopus.com/inward/record.url?scp=85070214899&partnerID=8YFLogxK
U2 - 10.1016/j.renene.2019.07.078
DO - 10.1016/j.renene.2019.07.078
M3 - Article
SN - 0960-1481
VL - 145
SP - 2316
EP - 2326
JO - Renewable Energy
JF - Renewable Energy
ER -
