Performing the best composition of supported Co/SiC catalyst for selective FTS diesel production
Performing the best composition of supported Co/SiC catalyst for selective FTS diesel production
复制标题
DOI：
10.1016/j.fuel.2011.11.002
复制
发表时间：
2012-05
期刊：
影响因子：
7.4
通讯作者：
A. R. Osa;A. Lucas;L. Sánchez-Silva;J. Díaz-Maroto;J. Valverde;P. Sánchez
中科院分区：
文献类型：
--
作者：
A. R. Osa;A. Lucas;L. Sánchez-Silva;J. Díaz-Maroto;J. Valverde;P. Sánchez
首次研究了一种高效的钙促进的钴/SiC选择性FTS柴油催化剂的设计。首次采用基于表征的响应面法（RSM）和平行的费托合成（FTS）实验对mCo-nCa/β-SiC催化剂进行了优化。基于统计方法，碱度和钴颗粒尺寸被发现是强烈的和线性的影响，分别通过添加钙和钴负载。还原度与钴的负载量呈非线性关系，当催化剂中钴含量为14.0wt.%时，还原度最大在不存在启动子的情况下的Co。催化性能表明，在助催化剂存在下，较低的钴含量使C5+烃产物分布向更具选择性的柴油制剂转变。因此，考虑那些提供CO转化率和C5+选择性之间的折衷的变量，12.5wt.%含2.0wt.%的Co Ca被证明是选择性柴油生产的最佳选择。
For the first time, the design of an efficient Ca-promoted cobalt/SiC catalyst for selective FTS diesel production was studied. Optimization of a mCo–nCa/β-SiC catalyst composition for producing selective synthetic diesel via Fischer–Tropsch synthesis (FTS) was carried out for the first time by both Response Surface Methodology (RSM) based on characterization and parallel bench scale FTS experimentation. Based on statistical methodologies, basicity and cobalt particle size were found to be strongly and linearly influenced by the addition of calcium and cobalt loading, respectively. Degree of reduction resulted in a non-linear dependence on the amount of cobalt supported presenting a maximum value for the catalyst containing 14.0wt.% Co in absence of promoter. Catalytic performance demonstrated that lower cobalt contents in presence of promoter shifted C5+hydrocarbon product distribution toward a more selective diesel formulation. Hence, pondering those variables that afford a compromise between CO conversion and C5+selectivity, a composition of 12.5wt.% Co with 2.0wt.% Ca was demonstrated to be the optimum for a selective diesel production.