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

Int J of Chemical Kinetics

2023

Self Cite

The Fe–Mn/Al2O3 nanocatalysts were manufactured via the sol‐gel procedure and were evaluated for Fischer–Tropsch synthesis. The impact of different operational parameters of T, P, and H2/CO ratio on the catalytic performance for light olefins production has been studied using response surface methodology (RSM). Furthermore, the optimization and modeling of selected responses were also carried out via RSM and historical data design type of DOE; and the best process conditions were found to be T = 365°C, H2/CO = 1.50, and P = 1.50 bar. The mechanism of CO hydrogenation reaction over the Fe–Mn/Al2O3 nanocatalysts was also investigated using the non‐linear regression method. It was found that the mechanism of the CO hydrogenation reaction is based on the Eley–Rideal type and the best‐fitted equation for this mechanism was found to be −rCO = KPCOPH2/1+αPCO. The obtained value of activation energy (85.20 kJ mol−1) affirmed the absence of internal mass transfer limitations. The physico‐chemical properties of the samples were investigated by various techniques of XRD, BET, TPR, TGA, and DSC.

Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

An investigation of the catalytic performance of Fe–Mn/Al₂O₃ nanocatalyst for light olefins production using RSM method and kinetic study

Int J of Chemical Kinetics

2023

Self Cite

“…In order to use the equation of a plug reactor for the calculation the rate of CO consumption in a differential reactor, the equation wileyonlinelibrary.com/jctb was changed, as explained in our previous works. [32][33][34][35][36] Finally Eqn (4) was obtained:…”

Section: Catalyst Evaluation Systemmentioning

confidence: 99%

CO hydrogenation reaction on Fe–Co–Mn nanocatalyst: impact of support and process conditions on performance and structure

J of Chemical Tech & Biotech

Abdouss

Zamani

et al. 2021

Self Cite

Study of mechanism and kinetic modeling of CO hydrogenation reaction over the impregnated Co‐Ni/Al₂O₃ catalyst

Fatemi

Mirzaei

et al. 2020

J Chinese Chemical Soc

An investigation of the kinetic and mechanism of CO hydrogenation reaction was performed on impregnated Co‐Ni/Al2O3. Determination of kinetic parameters from the experiments was carried out in a micro fixed‐bed reactor. Kinetic evaluations were performed under various operational conditions of T = 473–673 K, p = 1–14 bar, H2/CO = 1–3, and GHSV = 4,500 hr−1. Kinetic models and rate equations for CO consumption were obtained by using two main‐type rate equations of Langmuir‐Hinshelwood‐Hougen‐Watson (LHHW) and Eley‐Rideal (ER). Estimation of various kinetic parameters was performed using a nonlinear regression method. According to the obtained experimental results and using statistical criteria, one kinetic expression based on the LHHW mechanism (‐rCO = kp.bCO.PCO. bH2. PH2/[1+ bCO.PCO + bH2.PH2]2) was chosen as the best‐fitted model. For this fitted model, the activation energy was found to be 109.2 kJ/mol. Characterization of the catalyst was also performed using X‐ray diffraction (XRD), BET, scanning electron microscopy (SEM), and energy‐dispersive x‐ray spectrometer (EDS) techniques.