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采用水热法制备了具有片层结构的Ni/SiO2纳米复合空心结构催化剂,研究了其对甲烷干法重整(DRM)反应的催化活性和稳定性,并以传统浸渍法制备的Ni/SiO2催化剂作为参照样。结果表明,Ni/SiO2纳米复合空心结构催化剂有很高的比表面积(405.6 m2/g)和显著提高的高温抗烧结与抗积碳能力。这归因于该复合空心结构以片层状镍硅酸盐为前驱体,金属镍纳米颗粒由前驱体在氢气气氛中高温还原分解得到,使得该结构具有很强的金属纳米颗粒与载体之间的相互作用,因而具有优异的催化性能。
The Ni / SiO2 nano-composite hollow structure catalyst with lamellar structure was prepared by hydrothermal method. The catalytic activity and stability of the catalyst for dry-reforming methane (DRM) reaction were studied. The Ni / SiO2 Catalyst as a reference sample. The results show that the Ni / SiO2 nanocomposite hollow structure catalyst has high specific surface area (405.6 m2 / g) and significantly improved high temperature resistance to sintering and anti-carbon deposition. This is attributed to the composite hollow structure with lamellar nickel silicate as a precursor, the metal nickel nanoparticles from the precursor in a hydrogen atmosphere under high temperature reduction decomposition, making the structure has a strong metal nanoparticles and the carrier between Of the interaction, which has excellent catalytic performance.