Synthesis of middle distillate through low temperature Fischer-Tropsch (LTFT) reaction over mesoporous SDA supported cobalt catalysts using syngas equivalent to coal gasification

Mahato

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

et al. 2021

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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.

“…4). [45]. The conversion of syngas is higher for Co-Pd/MA catalyst, but selectivity towards the middle distillate product is higher for Co-Pd/SBA-15.…”

Section: Temperature-programmed Desorption (Tpd)mentioning

confidence: 91%

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

Mahato

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

et al. 2021

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“…[49][50] The SBA-15 is synthesized by the hydrothermal method in an acidic medium with molar composition: 1.73 TEOS : 0.016 P123 : 18.6 HCl : 133 H 2 O. [46,51]…”

Section: Preparation Of Sba-15mentioning

confidence: 99%

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

et al. 2023

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SBA‐15 is synthesized using triblock copolymer Pluronic P123 as the structure directing agent and different silica sources such as tetraethyl orthosilicate (TEOS), sodium metasilicate, coal fly ash (CFA) derived supernatant and a mix of sodium metasilicate, CFA‐derived supernatant for comparative study towards Fischer‐Tropsch synthesis (FTS). The active metal cobalt (15 wt. %) has been impregnated in each support via the wet impregnation technique. The catalysts and supports are characterized by N2 adsorption‐desorption, Field Emission Scanning Electron Microscopy (FESEM), High‐Resolution Transmission Electron Microscopy (HRTEM), X‐ray Diffraction (XRD), X‐ray Energy Dispersion Spectrophotometer (EDX), Fourier Transform Infrared (FTIR), and Temperature Programmed Reduction (TPR). The catalytic performance of synthesized catalysts for the FTS has been investigated in a fixed bed tubular reactor at T=220 °C, P=30 bar, and GHSV=500 h−1 using simulated syngas composition equivalent to coal‐derived syngas using air blown fixed bed gasifier having H2/CO molar ratio of 2 : 1. The maximum CO conversion and middle distillate (C6−C20) selectivity is observed as 59.2 % and 84.6 % respectively for the catalyst support synthesized from mix of sodium metasilicate and CFA‐derived supernatant.

“…Hence, selection of proper support/active metal, preparation techniques and pretreatment conditions are essential to optimize the metal–support interactions. To achieve better FT synthesis performance and dispersion of active metals, improved support (mixed oxides) Al 2 O 3 ‐SiO 2 , TiO 2 ‐SiO 2 and ZrO 2 ‐SiO 2 have been employed to modulate the structure and performance of catalysts 110,111 . Compared with conventional oxide supports, C materials such as carbon nanofibers (CNFs), nanotubes (CNTs), carbon spheres (CSs) and mesoporous carbons exhibit unique properties such as high purity, high mechanical strength, good electrical conductivity, high thermal stability and large surface area, hence may be used as potential supports for Co‐/Fe‐based FT catalysts 112,113 .…”

Section: Syngas Productionmentioning

confidence: 99%

“…109 Hence, selection of proper support/active metal, preparation techniques and pretreatment conditions are essential to optimize the metal-support interactions. To achieve better FT synthesis performance and 110,111 Compared with conventional oxide supports, C materials such as carbon nanofibers (CNFs), nanotubes (CNTs), carbon spheres (CSs) and mesoporous carbons exhibit unique properties such as high purity, high mechanical strength, good electrical conductivity, high thermal stability and large surface area, hence may be used as potential supports for Co-/Fe-based FT catalysts. 112,113 Presently, mesoporous materials such as MCM-41, 114 SBA-15 115 and hexagonal mesoporous silica (HMS) 116 have been explored as supports for active metal FTS catalysts.…”

Section: Supportsmentioning

confidence: 99%

Renewable fuels from different carbonaceous feedstocks: a sustainable route through Fischer–Tropsch synthesis

J of Chemical Tech & Biotech

Kumar

Maity

2021

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The Fischer–Tropsch (FT) process is an alternative route to produce petroleum crude equivalent, as this process converts carbonaceous feedstock‐derived (e.g. coal, biomass, natural gas) syngas to synthetic liquid fuels and chemicals. The technology also is known as gas‐to‐liquid (GTL), coal‐to‐liquid (CTL) and biomass‐to‐liquid (BTL) depending on the source of the syngas. Global demand for clean transportation fuels, volatile oil prices, unstable market scenarios and dwindling reserves of petroleum crude are the major drivers for fostering the FT process. FT‐derived synthetic liquid fuel has enormous potential to replace petroleum crude‐based transportation fuels. There is a possibility that individual countries can produce significant shares of their fuel using CTL, GTL and BTL technologies which help during shortages/peak oil circumstances. The present article summarizes the development of conversion of the different carbonaceous feedstock to liquid fuel including syngas generation, as well as catalytic conversion to liquid fuel via the FT route. © 2020 Society of Chemical Industry