Production of liquid hydrocarbons via Fischer–Tropsch synthesis on a pilot-scale reactor using a cobalt-based mesoporous catalyst

2022 ◽  
Author(s):  
Adriano Henrique Soares de Oliveira ◽  
Eduardo Falabella Souza Aguiar ◽  
Célio Loureiro Cavalcante
Keyword(s):  
Pilot Scale ◽  
Tropsch Synthesis ◽  
Liquid Hydrocarbons ◽  
Mesoporous Catalyst ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Pilot Scale Reactor ◽  
Scale Reactor

scholarly journals Dynamically Operated Fischer–Tropsch Synthesis in PtL—Part 2: Coping with Real PV Profiles

2020 ◽  
Vol 4 (2) ◽  
pp. 27 ◽  
Author(s):  
Marcel Loewert ◽  
Michael Riedinger ◽  
Peter Pfeifer
Keyword(s):  
Flow Rate ◽  
Real Data ◽  
Product Distribution ◽  
Pilot Scale ◽  
Primary Energy ◽  
Tropsch Synthesis ◽  
Photovoltaic System ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Relationship Model

Climate change calls for a paradigm shift in the primary energy generation that comes with new challenges to store and transport energy. A decentralization of energy conversion can only be implemented with novel methods in process engineering. In the second part of our work, we took a deeper look into the load flexibility of microstructured Fischer–Tropsch synthesis reactors to elucidate possible limits of dynamic operation. Real data from a 10 kW photovoltaic system is used to calculate a dynamic H2 feed flow, assuming that electrolysis is capable to react on power changes accordingly. The required CO flow for synthesis could either originate from a constantly operated biomass gasification or from a direct air capture that produces CO2; the latter is assumed to be dynamically converted into synthesis gas with additional hydrogen. Thus two cases exist, the input is constantly changing in syngas ratio or flow rate. These input data were used to perform challenging experiments with the pilot scale setup. Both cases were compared. While it appeared that a fluctuating flow rate is tolerable for constant product composition, a coupled temperature-conversion relationship model was developed. It allows keeping the conversion and product distribution constant despite highly dynamic feed flow conditions.

Fischer–Tropsch synthesis of syngas to liquid hydrocarbons

2020 ◽  
pp. 217-248 ◽  
Author(s):  
Sanjeet Mehariya ◽  
Angela Iovine ◽  
Patrizia Casella ◽  
Dino Musmarra ◽  
Alberto Figoli ◽  
...  
Keyword(s):  
Tropsch Synthesis ◽  
Liquid Hydrocarbons ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis

scholarly journals Experimental Modelling of Autoignition Temperature for Alkyl/Alkenyl Products from Fischer-Tropsch Synthesis

2018 ◽  
Vol 168 ◽  
pp. 07014 ◽  
Author(s):  
Jan Skřínský ◽  
Ján Vereš ◽  
Karel Borovec
Keyword(s):  
Carbon Monoxide ◽  
Tropsch Synthesis ◽  
Liquid Hydrocarbons ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Experimental Modelling ◽  
Fire Hazards ◽  
Oxygenated Hydrocarbons ◽  
Autoignition Temperature ◽  
Fire And Explosion

Interest in Fischer-Tropsch technology is increasing rapidly. Alkyl/alkenyl products from Fischer-Tropsch synthesis are alternative, renewable, environmentally and economically attractive fuels and there are considered one of the most favorable fuels for conventional fossil-based fuels. The chemistry of this gas-to-liquid industry converts synthesis gas containing carbon monoxide and hydrogen to oxygenated hydrocarbons such as alcohols. The fire hazards associated with the use of these liquid hydrocarbons mixtures are obvious. This article aims to explore the fundamental fire and explosion characteristics for main products composition from Fischer-Tropsch synthesis.

Kinetic Study of Fischer–Tropsch Synthesis Using a Co/CNTs Catalyst

2017 ◽  
Vol 42 (1) ◽  
pp. 80-88 ◽  
Author(s):  
Ali Nakhaei Pour ◽  
Javad Karimi ◽  
Hasan Oliaei Torshizi ◽  
Mohammadreza Hashemeian
Keyword(s):  
Space Velocity ◽  
Tropsch Synthesis ◽  
Molar Ratio ◽  
Rate Equations ◽  
Liquid Hydrocarbons ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Rate Determining Step ◽  
Intrinsic Kinetics ◽  
Kinetics Of

The intrinsic kinetics of the Fischer–Tropsch synthesis reaction in the conversion of synthesis gas into liquid hydrocarbons in a spinning basket reactor over a cobalt catalyst supported on carbon nanotubes were studied. The catalyst was synthesised by the impregnation wetness technique and the reactor tests were done at 215–245 °C, 20 bar, a H2/CO molar ratio of 2 and a gas hourly space velocity of 2.4–12 Nl gcat−1 h−1. To develop an appropriate kinetic model for syngas consumption, five different mechanisms were considered as possibilities for the Fischer–Tropsch reaction, each with a rate-determining step. The rate equations obtained were based on the Langmuir–Hinshelwood–Hougen–Watson model and statistical analyses were used for comparing the resulting values. The activation energies were found to be limited within the range 89–145 kJ mol−1 and the adsorption constants of hydrogen and carbon monoxide were in the range −32 to −76 kJ mol−1 and −13 to −64 kJ mol−1 respectively.

scholarly journals Dynamically Operated Fischer-Tropsch Synthesis in PtL-Part 1: System Response on Intermittent Feed

2020 ◽  
Vol 4 (2) ◽  
pp. 21 ◽  
Author(s):  
Marcel Loewert ◽  
Peter Pfeifer
Keyword(s):  
Packed Bed ◽  
Pilot Scale ◽  
Tropsch Synthesis ◽  
System Response ◽  
Negative Effects ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Cycle Times ◽  
Liquid Products ◽  
Term Energy

Society is facing serious challenges to reduce CO2 emissions. Effective change requires the use of advanced chemical catalyst and reactor systems to utilize renewable feedstocks. One pathway to long-term energy storage is its transformation into high quality, low-emission and CO2-neutral fuels. Performance of technologies such as the Fischer-Tropsch reaction can be maximized using the inherent advantages of microstructured packed bed reactors. Advantages arise not only from high conversion and productivity, but from its capability to resolve the natural fluctuation of renewable sources. This work highlights and evaluates a system for dynamic feed gas and temperature changes in a pilot scale Fischer-Tropsch synthesis unit for up to 7 L of product per day. Dead times were determined for non-reactive and reactive mode at individual positions in the setup. Oscillating conditions were applied to investigate responses with regard to gaseous and liquid products. The system was stable at short cycle times of 8 min. Neither of the periodic changes showed negative effects on the process performance. Findings even suggest this technology’s capability for effective, small-to-medium-scale applications with periodically changing process parameters. The second part of this work focuses on the application of a real-time photovoltaics profile to the given system.

A review of Fischer Tropsch synthesis process, mechanism, surface chemistry and catalyst formulation

2017 ◽  
Vol 2 (1) ◽  
pp. 11-31 ◽  
Author(s):  
Hamid Mahmoudi ◽  
Maedeh Mahmoudi ◽  
Omid Doustdar ◽  
Hessam Jahangiri ◽  
Athanasios Tsolakis ◽  
...  
Keyword(s):  
Surface Chemistry ◽  
Tropsch Synthesis ◽  
Liquid Fuels ◽  
Polymerization Reaction ◽  
Synthesis Process ◽  
Liquid Hydrocarbons ◽  
Carbon Monoxide Hydrogenation ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Silicon Chemistry

AbstractFor more than half a century, Fischer-Tropsch synthesis (FTS) of liquid hydrocarbons was a technology of great potential for the indirect liquefaction of solid or gaseous carbon-based energy sources (Coal-To-Liquid (CTL) and Gas-To-Liquid (GTL)) into liquid transportable fuels. In contrast with the past, nowadays transport fuels are mainly produced from crude oil and there is not considerable diversity in their variety. Due to some limitations in the first generation bio-fuels, the Second-Generation Biofuels (SGB)’ technology was developed to perform the Biomass-To-Liquid (BTL) process. The BTL is awell-known multi-step process to convert the carbonaceous feedstock (biomass) into liquid fuels via FTS technology. This paper presents a brief history of FTS technology used to convert coal into liquid hydrocarbons; the significance of bioenergy and SGB are discussed aswell. The paper covers the characteristics of biomass, which is used as feedstock in the BTL process. Different mechanisms in the FTS process to describe carbon monoxide hydrogenation aswell as surface polymerization reaction are discussed widely in this paper. The discussed mechanisms consist of carbide, CO-insertion and the hydroxycarbene mechanism. The surface chemistry of silica support is discussed. Silanol functional groups in silicon chemistry are explained extensively. The catalyst formulation in the Fischer Tropsch (F-T) process as well as F-T reaction engineering is discussed. In addition, the most common catalysts are introduced and the current reactor technologies in the F-T indirect liquefaction process are considered.

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