Increasing carbon utilization in Fischer–Tropsch synthesis using H2-deficient or CO2-rich syngas feeds

James, Olusola O.; Mesubi, Adediran M.; Ako, Tiena C.; Maity, Sudip

doi:10.1016/j.fuproc.2009.09.017

Cited by 98 publications

(61 citation statements)

References 61 publications

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“…Such a relatively high amount of CO 2 will be separated before the syngas is fed into FT reactors in conventional methods, which will cause a large portion of carbon loss from the biomass and make the overall carbon utilization rather low. In order to increase carbon utilization in the whole process, hydrogenation of CO 2 in the bio-syngas into liquid hydrocarbons may be a possible route to be investigated [75][76][77][78][79]. The utilization of CO 2 will reduce CO 2 emission into the environment and also help with bringing down the capital investment and operation cost of the FT process.…”

Section: Increasing Carbon Utilizationmentioning

confidence: 99%

Application of Fischer–Tropsch Synthesis in Biomass to Liquid Conversion

2012

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Fischer-Tropsch synthesis is a set of catalytic processes that can be used to produce fuels and chemicals from synthesis gas (mixture of CO and H 2 ), which can be derived from natural gas, coal, or biomass. Biomass to Liquid via Fischer-Tropsch (BTL-FT) synthesis is gaining increasing interests from academia and industry because of its ability to produce carbon neutral and environmentally friendly clean fuels; such kinds of fuels can help to meet the globally increasing energy demand and to meet the stricter environmental regulations in the future. In the BTL-FT process, biomass, such as woodchips and straw stalk, is firstly converted into biomass-derived syngas (bio-syngas) by gasification. Then, a cleaning process is applied to remove impurities from the bio-syngas to produce clean bio-syngas which meets the Fischer-Tropsch synthesis requirements. Cleaned bio-syngas is then conducted into a Fischer-Tropsch catalytic reactor to produce green gasoline, diesel and other clean biofuels. This review will analyze the three main steps of BTL-FT process, and discuss the issues related to biomass gasification, bio-syngas cleaning methods and conversion of bio-syngas into liquid hydrocarbons via Fischer-Tropsch synthesis. Some features in regard to increasing carbon utilization, enhancing catalyst activity, maximizing selectivity and avoiding catalyst deactivation in bio-syngas conversion process are also discussed.

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Section: Increasing Carbon Utilizationmentioning

confidence: 99%

Application of Fischer–Tropsch Synthesis in Biomass to Liquid Conversion

2012

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“…[10] The ratio H 2 /CO can range from below one to values higher than one, depending on whether gasification is performed in air or in steam/O 2 mixtures. [11,12] Undesired byproducts include tars (a complex mixture of organic condensable compounds, such as benzene, toluene, and naphthalene), sulfur-and nitrogen-containing compounds (mainly NH 3 , HCN, H 2 S, COS), chlorine (HCl), ash, and particles that contain alkali metals. [5,11,[13][14][15][16][17] The quality of the syngas produced affects its suitability for various end-use applications (in addition to clean transportation fuels, valuable chemicals such as short-chain olefins and oxygenates can be also produced).…”

Section: Introductionmentioning

confidence: 99%

Exploring Iron‐based Multifunctional Catalysts for Fischer–Tropsch Synthesis: A Review

2011

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The continuous increase in oil prices together with an increase in carbon dioxide concentration in the atmosphere has prompted an increased interest in the production of liquid fuels from non-petroleum sources to ensure the continuation of our worldwide demands while maximizing CO(2) utilization. In this sense, the Fischer-Tropsch (FT) technology provides a feasible option to render high value-added hydrocarbons. Alternative sources, such as biomass or coal, offer a real possibility to realize these purposes by making use of H(2)-deficient or CO(2)-rich syngas feeds. The management of such feeds ideally relies on the use of iron catalysts, which exhibit the unique ability to adjust the H(2)/CO molar ratio to an optimum value for hydrocarbon synthesis through the water-gas-shift reaction. Taking advantage of the emerging attention to hybrid FT-synthesis catalysts based on cobalt and their associated benefits, an overview of the current state of literature in the field of iron-based multifunctional catalysts is presented. Of particular interest is the use of zeolites in combination with a FT catalyst in a one-stage operation, herein named multifunctional, which offer key opportunities in the modification of desired product distributions and selectivity, to eventually overcome the quality limitations of the fuels prepared under intrinsic FT conditions. This review focuses on promising research activities addressing the conversion of syngas to liquid fuels mediated by iron-based multifunctional materials, highlights their preparation and properties, and discusses their implication and challenges in the area of carbon utilization through H(2)/CO(+CO(2)) mixtures.

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“…Liquid fuels in this area can be for instance ethanol, methanol and bio-diesel produced from different types of biomass using various methods. Fischer-Tropsch diesel produced from synthesis gas (CO and H 2 ) derived from renewable resources is a growing area of research [1][2][3][4]. Traditionally the synthesis gas used for the Fischer-Tropsch process was produced via coal gasification.…”

Section: Introductionmentioning

confidence: 99%

“…The producer gas contains CO, CO 2 , H 2 and H 2 O as well as CH 4 and higher hydrocarbons, including some tar compounds. There are also small amounts of contaminants present in the syngas, such as NH 3 , H 2 S, COS and HCN. The composition of the producer gas and the range and amounts of contaminants is largely dependent on the type of biomass and gasifier that is used for the production of the producer gas.…”

Section: Introductionmentioning

confidence: 99%

Modeling of soot formation during partial oxidation of producer gas

Svensson

Tunå

Hulteberg

et al. 2013

Fuel

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PostprintThis is the accepted version of a paper published in Fuel. This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination.Citation for the original published paper (version of record):Svensson, H., Tunå, P., Hulteberg, C., Brandin, J. (2013) Modeling of soot formation during partial oxidation of producer gas. Fuel AbstractSoot formation in a reverse flow partial oxidation reactor for reforming of gasifier producer gas has been studied. The process was modeled using a detailed reaction mechanism to describe the kinetics of soot formation. The numerical model was validated against experimental data from the literature and showed good agreement with reported data. Nine cases with differing composition was simulated in order to study the effect of water content, hydrogen content and methane content of the gas. The CO and CO 2 content was also varied to study its effect on soot formation as well as the tar content of the gas. The results show that steam and hydrogen content of the inlet gas had lower influence on the soot formation than expected. The methane content greatly influenced the soot formation. Results also showed that increasing the CO 2 content of the gas reduces the amount of soot formed and gives a higher energy efficiency and methane conversion. For the case with no tars in the ingoing gas the soot formation was significantly reduced. It can be concluded that removing the tars in an energy efficient way, prior to the partial oxidation reactor, will greatly reduce the amount of soot formed. Further investigation of tar reduction is needed and experimental research of this process is undergoing.

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Increasing carbon utilization in Fischer–Tropsch synthesis using H2-deficient or CO2-rich syngas feeds

Cited by 98 publications

References 61 publications

Application of Fischer–Tropsch Synthesis in Biomass to Liquid Conversion

Application of Fischer–Tropsch Synthesis in Biomass to Liquid Conversion

Exploring Iron‐based Multifunctional Catalysts for Fischer–Tropsch Synthesis: A Review

Modeling of soot formation during partial oxidation of producer gas

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