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
发布期刊链接：https://www.sciencedirect.com/science/article/pii/S0196890419307186?via%3Dihub