以活性炭(AC)为载体、铂为助剂,采用满孔浸渍法制备钴基催化剂.在钴基催化剂的制备过程中引入辉光放电等离子体技术,以替代传统的焙烧方式,研究辉光放电等离子体处理对催化剂结构以及费-托合成催化性能的影响.结果表明,空气气氛辉光放电等离子体处理可使硝酸钴有效分解,且生成的氧化钴粒径减小,显著提高载体上钴的分散度.高钴分散度和较高钴还原性能的协同作用使得辉光放电等离子体处理催化剂的费-托合成催化活性高于焙烧处理催化剂.
Using active carbon(AC) as a carrier and platinum as an additive,cobalt-based catalyst was prepared by initial wet impregnation.The glow discharge plasma technology was introduced during the cobalt-based catalyst preparation to replace the traditional calcination process.The effects of glow discharge plasma treatment on the structure and Fischer-Tropsch synthesis(FTS) catalytic property of catalysts were investigated.The results showed that,the air atmosphere glow discharge plasma treatment could effectively decompose cobalt nitrate,significantly decrease the size of cobalt oxide particle,and remarkably improve the cobalt dispersion.Synergism of high dispersion and reducibility of cobalt led to the FTS catalytic activity of plasma treated catalyst higher than that of calcinated catalyst.