The Conversion of Waste Biomass into Carbon-Supported Iron Catalyst for Syngas to Clean Liquid Fuel Production

Abstract

Syngas has been utilized in the production of chemicals and fuels, as well as in the creation of electricity. Feedstock impurities, such as nitrogen, sulfur, chlorine, and ash, in syngas have a negative impact on downstream processes. Fischer–Tropsch synthesis is a process that relies heavily on temperature to increase the production of liquid fuels (FTS). In this study, waste biomass converted into activated carbon and then a carbon-supported iron-based catalyst was prepared. The catalyst at 200 °C and 350 °C was used to investigate the influence of temperature on the subsequent application of syngas to liquid fuels. Potassium (K) was used as a structural promoter in the Fe-C catalyst to boost catalyst activity and structural stability (Fe-C-K). Low temperatures (200 °C) cause 60% and 80% of diesel generation, respectively, without and with potassium promoter. At high temperatures (350 °C), the amount of gasoline produced is 36% without potassium promoter, and 72% with promoter. Iron carbon-supported catalysts with potassium promoter increase gasoline conversion from 36.4% (Fe-C) to 72.5% (Fe-C-K), and diesel conversion from 60.8% (Fe-C) to 80.0% (Fe-C-K). As seen by SEM pictures, iron particles with potassium promoter were found to be equally distributed on the surface of activated carbon.

Effect of Pyrolysis on iron-metal organic frameworks (MOFs) to Fe3C @ Fe5C2 for diesel production in Fischer-Tropsch Synthesis

“…N was observed less as compared to pyrolysis P. MOF.N. ( Amin et al, 2022c ), ( Mahmood et al, 2022 )…”

“…To determine the product selectivity, the peak area in the GCMS findings is employed. The FTS plant used for this experiment is shown schematically in Figure 2 ( Amin et al, 2022c ).…”

A Review of the Use of Carbon Nanostructures and Other Reducing Agents During Auto-reduction for Fischer–Tropsch Synthesis and Other Applications

“…Promoters such as K and Cu have mostly been used to improve the activity and selectivity of iron-based catalysts [105]. Duan et al [106] found that the promotional effects of potassium on iron-based catalysts supported on carbon nanotubes include lower olefin selectivity, higher activity and better stability due to higher carbidisation and increased defects on carbon nanotubes to anchor the iron nanoparticles. For a K-promoted iron catalyst supported on carbon spheres, Xiong et al [57] reported that the addition of K led to higher hydrocarbon selectivity.…”

Modelling and Simulation Applied to Fischer- Tropsch Synthesis

“…Results reported in literature indicate that in order to obtain higher selectivity to C 5+ hydrocarbon chains, it is desirable to operate the process at 220 o C and a 2:1 H 2 /CO ratio. The work done by Amin et al [10]. showed that it was possible to achieve up to 72.6% of gasoline fraction and up to 80% of diesel fraction selectivity using an iron-based catalyst with potassium promoter at these conditions.…”