中南大学
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返回首页Hydrogen production through steam reforming of toluene over Ce, Zr or Fe promoted Ni-Mg-Al hydrotalcite-derived catalysts at low temperature
发布时间：2024-09-30
点击次数：
- DOI码：
- 10.1016/j.enconman.2019.06.047
- 所属单位：
- 中南大学
- 发表刊物：
- Energy Conversion and Management
- 关键字：
- Carbon deposit; Catalytic cracking; Hydrotalcite-derived catalysts; Toluene
- 摘要：
- Ni-Mg-Al hydrotalcite-derived materials promoted with Ce, Zr or Fe were prepared by the co-precipitation method, which exhibited excellent performance in steam reforming of toluene (SRT) at low temperature. Especially, Fe-doped catalyst had higher catalytic activity and stability at 400 °C, which maintained almost 100% toluene conversion during the SRT reaction (3 h). Moreover, it also had higher hydrogen production and better selectivity for hydrogen production. The physico-chemical characterizations and model simulation indicate its high dispersion of active sites and accessibility of reactants to active sites: uniform dispersion of active sites (SEM, TEM and EDX), large specific surface area (151 m2/g), pore volume (0.84 cm3/g) and average pore diameter (22.1 nm), small crystallite size (34.9 nm), desirable Ni species reducibility (TPR), high basicity (TPD), low metal carbide formation (XPS), and good adsorption affinity with toluene (−18.391 kJ mol−1, DFT). Moreover, less carbon was deposited on the Fe-containing catalyst through measuring the amorphous carbon and CNTs by the TG-MS method, which was due to the tip-growth mechanism of CNTs. Considering lower toluene conversion temperature, higher hydrogen yield, and better resistance to carbon deposition, this study may be meaningful in development of SRT at low temperature.
- 论文类型：
- 期刊论文
- 卷号：
- 196
- 页面范围：
- 677 - 687
- ISSN号：
- 01968904
- 是否译文：
- 否
- 发表时间：
- 2019-09-15
- 收录刊物：
- SCI