A DFT study towards dynamic structures of iron and iron carbide and their effects on the activity of the Fischer–Tropsch process
Qiang Yin, Hanqing Wang, Jinping Zhao, Chengjun Li, Yu Mao
Abstract
atomistic thermodynamics and Wulffman construction were employed to evaluate the stability of these surfaces at different chemical potentials of carbon. Their FTS reactivity and selectivity were later assessed by semi-quantitative micro-kinetic equations. The results show that stability, reactivity, and selectivity of the iron are all affected by the carbonization process when the carbon ratio increases. Formation of the carbide, a rather natural process under experimental conditions, would moderately increase the turnover frequency (TOF), but both iron and iron carbide are active to the reaction.
Topics & Concepts
Fischer–Tropsch processCarbideReactivity (psychology)Carbon fibersSelectivityCarbonizationChemistryChemical engineeringCatalysisAb initioMaterials scienceComputational chemistryThermodynamicsOrganic chemistryAdsorptionComposite materialComposite numberEngineeringAlternative medicinePathologyMedicinePhysicsCatalysts for Methane ReformingElectrocatalysts for Energy ConversionCatalysis and Hydrodesulfurization Studies