Synthesis gas production for FT synthesis

Aasberg‐Petersen, Kim; Christensen, Toke Haunstrup; Dybkjær, Ib; Sehested, Jens; Østberg, Martin; Coertzen, R.M.; Keyser, M.J.; Steynberg, A.P.

doi:10.1016/s0167-2991(04)80461-0

Cited by 86 publications

(76 citation statements)

References 39 publications

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“…26,27 It is very well known that nickel based catalysts are particularly prone to sulphur deactivation. 28,29 However, recent results from Song et al 26,27 have, surprisingly, indicated that the high partial pressure of hydrogen used in these reactions might help prevent the deactivation of nickel catalysts due to sulphur. Additionally, Ni/ZrO 2 has been specifically found attractive in a screening study for HDO of phenol.…”

Section: Introductionmentioning

confidence: 99%

Stability and resistance of nickel catalysts for hydrodeoxygenation: carbon deposition and effects of sulfur, potassium, and chlorine in the feed

Mortensen

Gardini

Carvalho

et al. 2014

Catal. Sci. Technol.

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aThe long term stability and resistance toward carbon deposition, sulfur, chlorine, and potassium of Ni/ZrO 2 as a catalyst for the hydrodeoxygenation (HDO) of guaiacol in 1-octanol (as a model compound system for bio-oil) has been investigated at 250°C and 100 bar in a trickle bed reactor setup. Without impurities in the feed good stability of the Ni/ZrO 2 catalyst could be achieved over more than 100 h of operation, particularly for a sample prepared with small Ni particles, which minimized carbon deposition.Exposing the catalyst to 0.05 wt% sulfur in the feed resulted in rapid deactivation with complete loss of activity due to the formation of nickel sulfide. Exposing Ni/ZrO 2 to chlorine-containing compounds (at a concentration of 0.05 wt% Cl) on-stream led to a steady decrease in activity over 40 h of exposure.Removal of the chlorine species from the feed led to the regaining of activity. Analysis of the spent catalyst revealed that the adsorption of chlorine on the catalyst was completely reversible, but chlorine had caused sintering of nickel particles. In two experiments, potassium, as either KCl or KNO 3 , was impregnated on the catalyst prior to testing. In both cases deactivation was persistent over more than 20 h of testing and severely decreased the deoxygenation activity while the hydrogenation of guaiacol was unaffected. Overall, sulfur was found to be the worst poison, followed by potassium and then chlorine. Thus, removal/limitation of these species from bio-oil is a requirement before long term operation can be achieved with this catalyst.

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Section: Introductionmentioning

confidence: 99%

Stability and resistance of nickel catalysts for hydrodeoxygenation: carbon deposition and effects of sulfur, potassium, and chlorine in the feed

Mortensen

Gardini

Carvalho

et al. 2014

Catal. Sci. Technol.

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“…3,4 As synthesis gas generation does not depend on petroleum and can be produced from natural gas, coal, or biomass, FTS offers an alternative, petroleumfree route to produce commodity fuels such as gasoline and diesel. 5 Success of FT operation is strongly linked to the ability of obtaining desired product selectivity in terms of type and chain length of the hydrocarbons, which are strongly affected by the process conditions, namely by temperature, partial pressures of H 2 and CO in feed and space velocity. 6 It is confirmed by many studies in the literature that the impact of process temperature on selectivity is more significant than those of other operating conditions.…”

Section: Introductionmentioning

confidence: 99%

Parametric analysis of Fischer‐tropsch synthesis in a catalytic microchannel reactor

Gumuslu

Avcı

2011

AIChE Journal

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in Wiley Online Library (wileyonlinelibrary.com).Fischer-Tropsch synthesis (FTS) involves highly exothermic conversion of syngas to a wide range of hydrocarbons, but demands isothermal conditions due to the strong dependence of product distribution on temperature. Running FTS in microchannel reactors is promising, as the sub-millimeter dimensions can lead to significant intensification that inherently favors robust temperature control. This study involves computerbased FTS simulations in a heat-exchange integrated microchannel network composed of horizontal groups of square-shaped cooling and wall-coated, catalytic reaction channels. Effects of material type and thickness of the wall separating the channels, side length of the cooling channel, coolant flow rate, and channel wall texture on reaction temperature are investigated. Use of thicker walls with high thermal conductivities and micro-baffles on the catalytic reaction channel wall favor near-isothermal conditions. Response of reaction temperature against coolant flow rate is significant. Using cooling channels with smaller side lengths, however, is shown to be insufficient for temperature control.

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“…A mixture of steam and air or oxygen is commonly used as gasifying agents in industry. The use of air reduces the heating value of the gas due to the dilution with nitrogen and increases the volume of the gas to be treated (Aasberg-Petersen et al 2004).…”

Section: Fischer-tropsch Processmentioning

confidence: 99%

Pressure swing adsorption for CO2 capture in Fischer-Tropsch fuels production from biomass

2010

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Environmental concerns and oil price rises and dependency promoted strong research in alternative fuel sources and vectors. Fischer-Tropsch products are considered a valid alternative to oil derivatives having the advantage of being able to share current infrastructures. As a renewable source of energy, synthesis gas obtained from biomass gasification presents itself as a sustainable alternative. However, prior to hydrocarbon conversion, the bio-syngas must be conditioned, which includes the removal of carbon dioxide for subsequent sequestration and capture. A pressure swing adsorption cycle was developed for the removal and concentration of CO 2 from the bio-syngas stream. Activated carbon was chosen as adsorbent. The simulation results showed that it was possible to produce a (H 2 + CO) product with a H 2 /CO stoichiometric ratio of 2.14 (suitable as feed stream for the Fischer-Tropsch reactor) and a CO 2 product with a purity of 95.18%. A CO 2 recovery of 90.3% was obtained. A power consumption of 3.36 MW was achieved, which represents a reduction of about 28% when compared to a Rectisol process with the same recovery.Keywords PSA · Fischer-Tropsch · CO 2 capture · Biomass · Biosyngas Abbreviations Notation a p particle specific area (m −1 ) A virial coefficients (m 2 mol −1 ) B virial coefficients (m 4 mol −2 )

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Synthesis gas production for FT synthesis

Cited by 86 publications

References 39 publications

Stability and resistance of nickel catalysts for hydrodeoxygenation: carbon deposition and effects of sulfur, potassium, and chlorine in the feed

Stability and resistance of nickel catalysts for hydrodeoxygenation: carbon deposition and effects of sulfur, potassium, and chlorine in the feed

Parametric analysis of Fischer‐tropsch synthesis in a catalytic microchannel reactor

Pressure swing adsorption for CO2 capture in Fischer-Tropsch fuels production from biomass

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