Azizi Hamid Reza, Mansouri Mohsen, Farshchi Tabrizi Farshad, Mansouri Ghobad, Setareshenas Naimeh
Department of Chemical Engineering, Ilam University, Ilam, 69315516, Iran.
Ilam Gas Treating Company, Tajrian, Ilam Province, Chovar, Iran.
Sci Rep. 2024 Jun 12;14(1):13563. doi: 10.1038/s41598-024-64382-0.
This study aims to assess the kinetics of Fischer-Tropsch (FT) reaction over the cobalt-manganese nanoparticles supported by silica oxide. Nanoparticles were synthesized by the thermal decomposition method using "[Co(NH)CO]MnO" complex and characterized by XRD, TEM, and BET techniques. The kinetics of the process were evaluated using a combination of Langmuir-Hinshelwood-Hougen-Watson (LHHW) and response surface methodology. Correlation factors of 0.9902 and 0.962 were obtained for the response surface method (RSM) and LHHW, respectively. The two methods were in good agreement, and the results showed that the rate-determining step was the reaction of the adsorbed methylene with the adsorbed hydrogen atom, and only carbon monoxide molecules were the most active species on the catalyst surface. A temperature of 502.53 K and a CO partial pressure of 2.76 bar are proposed as the optimal conditions by RSM analysis. The activation energy of CO consumption reaction was estimated to be 61.06 kJ/mol.
本研究旨在评估氧化硅负载的钴 - 锰纳米颗粒上费托（FT）反应的动力学。使用“[Co(NH)CO]MnO”配合物通过热分解法合成纳米颗粒，并通过XRD、TEM和BET技术对其进行表征。使用朗缪尔 - 欣谢尔伍德 - 霍根 - 沃森（LHHW）和响应面方法相结合来评估该过程的动力学。响应面法（RSM）和LHHW的相关系数分别为0.9902和0.962。这两种方法吻合良好，结果表明速率决定步骤是吸附的亚甲基与吸附的氢原子的反应，并且只有一氧化碳分子是催化剂表面上最具活性的物种。通过RSM分析提出502.53 K的温度和2.76 bar的CO分压作为最佳条件。CO消耗反应的活化能估计为61.06 kJ/mol。
