Preparation and characterization of promoted Fe–Mn/ZSM-5 nano catalysts for CO hydrogenation

Assessment of composition and calcination parameters in Fischer-Tropsch synthesis over Fe–Mn–Ce/γ-Al2O3 nanocatalyst

“…As well as reduces catalyst adsorption abilities for CO and H 2 . In our previous studies [24,[42][43][44][45][46], we indicated the importance of calcination parameters also, the obtained results have demonstrated that the change in the calcination parameters leads to more thermodynamically stable phase changing. The main goal of this study is to assessment the influence of nanocatalyst composition and calcination parameters on the activity and selectivity of iron-manganese-cerium mixed oxide nanocatalyst prepared by incipient wetness impregnation under vacuum method in a fixed-bed reactor for light olefins production via FT synthesis.…”

“…After the calcined nanocatalyst was placed into the reactor chamber and during reduction process and FTS, a part of the metallic phases for example Fe is converted to Fe 3 C and Fe 2 C carbides. The iron carbides formed on the nanocatalyst surface raise the FT performance and selectivity to light olefins [24,50].…”

“…Furthermore, having benefits such as proper selectivity to the light olefins, high CO conversion, and compatibility to the operating conditions has distinguished iron-based catalysts from others [21][22][23]. In recent years, the Fe-Mn bimetallic catalyst systems have been noticed because of their high olefin selectivity and excellent stability [24][25][26][27][28][29][30][31]. The results obtained by Maiti et al [32] showed that in iron-manganese catalysts, if manganese content is low the interaction of the metals is significant and the formation of light olefins increases.…”

Modeling of liquid hydrocarbon products from syngas

“…In a bid to achieve a better knowledge of the FTS, some studies were conducted to understand the effects of operating conditions and different catalyst promoters on the distribution of the FTS products. These studies have demonstrated that iron-based catalysts produced paraffins, particularly paraffins and olefins with low molecular weight, depending on the reaction conditions used and the kind of catalysts and reactors used (Farias et al 2008;Feyzi et al 2015;Peña et al 2018). Although there are a lot of kinetic expressions for CO consumption in literature, the one which focuses on the prediction of hydrocarbon selectivity is hardly found.…”

Molecular-Cage Method: An Improvement of the Precipitation Method in Synthesizing Nanoparticles

“…Nanoparticles have a lot of advantages over ordinary particles, such as high surface-to-volume ratio, high reactivity, high surface energy, and high absorbability. These advantages make them applicable in the following areas: catalysts, , drug delivery, wave absorbing, nanosensors, , and so on. So far, various techniques, such as emulsion and microemulsion, template, mechanochemical, polymer micelle, sol–gel, and microwave methods, have been used for the synthesis of nanoparticles.…”