Development of kinetic model for CO hydrogenation reaction over supported Fe-Co-Mn catalyst

作者：Arsalanfar M^*; Abdouss M^*; Mirzaei N; Zamani Y

来源：New Journal of Chemistry, 2017, 41(18): 10452-10466.

DOI：10.1039/c6nj04126d

Kinetic modeling of CO hydrogenation over Fe-Co-Mn catalyst was investigated; a ternary catalyst was prepared using incipient wetness impregnation. The kinetic parameters were determined from experiments carried out in a fixed bed micro-reactor under the following process conditions: T = 523.15-533.15 K, P = 1-10 bar, H-2/CO = 1/1-3/1 and space velocity = 4500 h(-1). Seventeen rate expressions were derived from five different mechanisms according to Langmuir-Hinshelwood-Hougen-Watson (LHHW) and Eley-Rideal (ER) mechanisms and were tested against the experimental data. Non-linear regression method was used to estimate different kinetic parameters; according to the obtained experimental results and using statistical criteria, one kinetic expression based on LHHW mechanism (-r(CO) = KPCO center dot(P-H2)(0.5)/[1 + alpha P-CO + (beta P-H2)(0.5)](2)) was chosen as the best fitted model. The activation energy for this model was found to be 84.5 kJ mol(-1). The physicochemical properties of the catalyst were investigated using XRD, SEM, BET and TPR techniques.

• 出版日期2017-9-21