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采用溶胶凝胶法,制备了负载型镍基钙钛矿型催化剂,并在常压微反应装置上对其氨分解催化活性进行了评价。采用BET、XRD、TPR、TEM等方法对催化剂进行表征。研究结果表明,以MCM-41分子筛为载体的催化剂,由于其较大的比表面积和规整的介孔结构,使活性组分能够很好地分散在载体表面,有利于增加有效活性位,提高活性组分的反应能力,表现出很好的氨分解催化活性。以NiO计,负载量为20%的LaNiO_3/MCM-41具有比非负载的LaNiO_3更好的催化活性,这样不仅提高了催化活性,还大大地减少了活性组分用量,降低了生产成本,从而具有很好的应用前景。
The sol-gel method was used to prepare the supported nickel-based perovskite catalyst. The catalytic activity of ammonia decomposition was evaluated in an atmospheric pressure microreactor. The catalysts were characterized by BET, XRD, TPR and TEM. The results show that the MCM-41 zeolite-based catalyst, due to its large specific surface area and regular mesoporous structure, so that the active component can be well dispersed in the carrier surface is conducive to increasing the effective active site and improve activity The ability of the components to react shows good ammonia decomposition catalytic activity. In terms of NiO, LaNiO 3 / MCM-41 with a loading of 20% has better catalytic activity than non-supported LaNiO 3, which not only improves the catalytic activity, but also greatly reduces the amount of the active components and reduces the production cost Has a good application prospects.