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用透射电镜对Ni系催化剂的积炭情况进行了研究。结果表明,催化剂添加稀土元素后,对其积炭的影响很大。用电镜对Z107及Z111两种催化剂进行观察时发现,在未加稀土的Z107催化剂样品上有积炭现象产生,在炭须的尾端都有一个金属Ni的微粒,而且,该金属微粒的表面被由从气相中吸附的炭所覆盖;将Z107样品与添加La_2O_3的Z111催化剂进行对比后发现,Z111样品的抗积炭性能有很大的改善。此外,还对炭须的生长过程进行了研究。
Transmission electron microscopy was used to study the carbon deposition of Ni-based catalysts. The results show that the rare earth elements added to the catalyst have a great influence on the carbon deposition. Electron microscopy Z107 and Z111 two catalysts were observed when found in the rare earth Z107 catalyst sample carbon deposition phenomenon occurs in the end of the carbon whiskers have a metal Ni particles, and the surface of the metal particles Was covered by the carbon adsorbed from the gas phase. Comparing the Z107 sample with the Z111 catalyst with La2O3 added, it was found that the anti-carbon deposition performance of the Z111 sample was greatly improved. In addition, the growth of charcoal was also studied.