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    Auto-thermal reforming of acetic acid for hydrogen production by ordered mesoporous Ni-xSm-Al-O catalysts: Effect of samarium promotion

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    Type
    Article
    Authors
    Zhou, Qing
    Zhong, Xinyan
    Xie, Xingyue
    Jia, Xuanyi
    Chen, Baiquan
    Wang, Ning cc
    Huang, Lihong cc
    KAUST Department
    Advanced Membranes and Porous Materials Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia
    Date
    2019-07-18
    Online Publication Date
    2019-07-18
    Print Publication Date
    2020-01
    Embargo End Date
    2021-07-18
    Permanent link to this record
    http://hdl.handle.net/10754/656771
    
    Metadata
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    Abstract
    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.
    Citation
    Zhou, Q., Zhong, X., Xie, X., Jia, X., Chen, B., Wang, N., & Huang, L. (2020). Auto-thermal reforming of acetic acid for hydrogen production by ordered mesoporous Ni-xSm-Al-O catalysts: Effect of samarium promotion. Renewable Energy, 145, 2316–2326. doi:10.1016/j.renene.2019.07.078
    Sponsors
    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).
    Publisher
    Elsevier Ltd
    Journal
    Renewable Energy
    DOI
    10.1016/j.renene.2019.07.078
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S0960148119310985
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.renene.2019.07.078
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