Auto-thermal reforming of acetic acid for hydrogen production by ordered mesoporous Ni-xSm-Al-O catalysts: Effect of samarium promotion
KAUST DepartmentAdvanced Membranes and Porous Materials Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia
Online Publication Date2019-07-18
Print Publication Date2020-01
Embargo End Date2021-07-18
Permanent link to this recordhttp://hdl.handle.net/10754/656771
MetadataShow full item record
AbstractBiomass-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.
CitationZhou, 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
SponsorsThis 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).