Fuel production through Fischer–Tropsch synthesis on carbon nanotubes supported Co catalyst prepared by plasma
Fuel production through Fischer–Tropsch synthesis on carbon nanotubes supported Co catalyst prepared by plasma
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DOI：
10.1016/j.fuel.2013.12.049
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发表时间：
2014-04
期刊：
影响因子：
7.4
通讯作者：
Tingjun Fu;Chengdu Huang;Jing Lv;Zhenhua Li
中科院分区：
文献类型：
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作者：
Tingjun Fu;Chengdu Huang;Jing Lv;Zhenhua Li
本文通过引入等离子体技术进行前驱体分解，研究了一种更有效的碳纳米管负载钴催化剂（Co/CNTs）的制备方法。还比较了不同制备方法制备的Co催化剂的微观结构和费托（FT）性能。研究发现，Co/CNTs 催化剂可以在 Ar 或空气气氛中于 200 °C 下煅烧制备，但不能在空气气氛中高温获得。 Ar气氛中较高的煅烧温度导致钴物种的聚集和还原，这不利于提高FT性能。然而，介质阻挡放电（DBD）等离子体处理可以代替传统的煅烧方法来制备具有均匀分散的Co颗粒的Co/CNTs催化剂。 DBD等离子体制备的钴催化剂可以达到与200℃煅烧的钴催化剂相似的FT性能。等离子体处理的一大优点是可以在短时间内以较少的能量输入使前驱体在较低的温度下分解。因此等离子体被证明是费托合成钴基催化剂制备的有效替代方法。
In this paper, a more efficient preparation method for Co catalyst supported on carbon nanotubes (Co/CNTs) was investigated by introducing plasma technique for precursor decomposition. The microstructure and the Fischer–Tropsch (FT) performance of the Co catalysts prepared by different preparation methods were also compared. It was found that Co/CNTs catalyst can be prepared by calcination at 200 °C in either Ar or air atmosphere but can not be obtained at high temperature in air atmosphere. High calcination temperature in Ar atmosphere caused the aggregation and reduction of the cobalt species, which are not good for improving the FT performance. However, dielectric-barrier discharge (DBD) plasma treatment can replace the traditional calcination method to prepare Co/CNTs catalyst with uniformly dispersed Co particles. The cobalt catalysts prepared by DBD plasma can achieve similar FT performance with the Co catalysts calcined at 200 °C. A big advantage of plasma treatment is to make the precursor decomposed at lower temperature with less energy input in a short period of time. So plasma is proved to be an efficient alternative approach for Co-based catalyst preparation for FT synthesis.