1. Solid solution-type Sm–Pr–O supported nickel-based catalysts for auto-thermal reforming of acetic acid: the role of Pr in solid solution.
- Author
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Liu, Jinbo, Huang, Jia, Ding, Chenyu, Liao, Fuxia, Shu, Chenghong, and Huang, Lihong
- Subjects
SOLID solutions ,CATALYST supports ,ACETIC acid ,STEAM reforming ,HYDROGEN production ,ACTIVATION energy - Abstract
Hydrogen, as a promising energy carrier, can be extracted from renewable biomass derived acetic acid (HAc). Ni-based catalysts supported on solid solution of Sm
2−x Prx O3±δ were prepared using a coprecipitation method and evaluated in auto-thermal reforming (ATR) of HAc for hydrogen production. The results revealed that Pr species infiltrated the Sm2 O3 lattice and formed a solid solution structure with oxygen vacancy defects, in which the redox process of Sm3+ + Pr3+ Sm2+ + Pr4+ enhanced oxygen mobility, facilitating gasification of the coking precursor and suppressing carbon deposition. DFT analysis also confirmed that Pr doping into the Sm2−x Prx O3±δ solid solution significantly lowered the energy barrier by 112 kJ mol−1 for formation of oxygen vacancies. Additionally, the interaction between Ni0 and Sm2−x Prx O3±δ effectively improved the dispersion of Ni0 metal particles, inhibiting sintering of Ni species. Consequently, the NSP10 catalyst (Ni0.80 Sm1.72 Pr0.24 O3.74±δ ) exhibited outstanding catalytic performance for hydrogen production: the conversion of HAc approached 100%, while the hydrogen yield remained stable at 2.75 mol-H2 /mol-HAc. [ABSTRACT FROM AUTHOR]- Published
- 2024
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