Fischer–Tropsch synthesis over Pd promoted cobalt based mesoporous supported catalyst

Abstract

The present study focuses on the catalytic conversion of syngas (CO + H2) through Fischer–Tropsch (FT) route using two identically prepared 0.1 wt.% palladium promoted Mesoporous Alumina (MA) and SBA–15 supported Co (15 wt.%) catalysts. The Fischer–Tropsch activity is performed in a fixed bed tubular reactor at temperature 220 °C and pressure 30 bar with H2/CO ratio ~2 having Gas Hourly Space Velocity (GHSV) of 500 h−1. Detail characterizations of the catalysts are carried out using different analytical techniques like N2 adsorption-desorption, Temperature-programmed reduction with hydrogen (H2-TPR), Temperature-programmed desorption with NH3 (NH3-TPD), X-Ray Diffraction (XRD), and Transmission Electron Microscopy (TEM). The results show that the SBA–15 supported catalyst exhibits higher C6–C12 selectivity (57.5%), and MA supported catalyst facilitates the formation of higher hydrocarbons (C13–C20) having a selectivity of 46.7%. This study attributes the use of both the support materials for the production of liquid hydrocarbons through FT synthesis.

Effects of Pd and Co intimacy in Pd-modified Co/TiO2 catalysts for direct CO2 hydrogenation to fuels: the closer not the better

“…Significant differences can be observed in the H 2 -TPR profiles of the catalysts. Overall and as expected, 76 Pd promotion increases cobalt reducibility: all bimetallic catalysts show a significant shift of the Co 3 O 4 reduction to CoO at temperatures between 145 and 165 °C, while this step takes place above 300 °C in the case of the unpromoted 10Co/ catalyst. This should be correlated to H-spillover from Pd to Co, a well-established phenomenon for Pd/TiO 2 catalysts.…”

Comparative Studies of Co/SBA‐15 Catalysts Synthesized with Different Silica Sources Including Coal Fly Ash for Fischer‐Tropsch Synthesis

“…The different morphology of SBA‐15 (Figure S2 in the supporting information) supports and distinct silica sources may significantly impact the diffusion path of reactants and products and hence affects the FTS performance. The product spectrum of the FT process is highly dependent on the reaction parameter, H 2 /CO ratio, and particle size of the catalysts [44–45] …”

“…The product spectrum of the FT process is highly dependent on the reaction parameter, H 2 /CO ratio, and particle size of the catalysts. [44][45]…”

A Review on Conversion of Biomass to Liquid Fuels and Methanol through Indirect Liquefaction Route

“…Limited reserve and high cost hinder its industrial‐scale application. Nickel also has hydrogenation activity but only favours methane production, also at higher temperatures forms “surface carbonyl” which is volatile and causes the deactivation of the catalyst [85–86] . As a result, only cobalt and iron have been considered as commercial catalyst for FT synthesis.…”

“…Nickel also has hydrogenation activity but only favours methane production, also at higher temperatures forms "surface carbonyl" which is volatile and causes the deactivation of the catalyst. [85][86] As a result, only cobalt and iron have been considered as commercial catalyst for FT synthesis. The salient features of both catalysts are mentioned in Table 8.…”