Pseudoadiabatic catalytic reactor operation for the conversion of synthesis gas into hydrocarbons (gasoline range)

Simard, François; Mahay, A.; Ravella, A.; Jean, G; Lasa, Hugo de

doi:10.1021/ie00055a008

Cited by 20 publications

(9 citation statements)

References 6 publications

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“…Metal oxides such as Cr 2 O 3 -ZnO and ZrO 2 with MOR, ZSM-5, and Y were also attempted for syngas conversion as early as in the 1980s, as listed in Table . The pioneering work reported by Chang et al involved syngas conversion to aromatics and ethane using ZrO 2 -MOR, ZrO 2 -ZSM-5, and ZnCr oxides-ZSM-5. , Thereafter, de Lasa and co-workers studied a physical mixture of Cr 2 O 3 -ZnO and ZSM-5 for syngas conversion. − A 56% selectivity for C 5+ hydrocarbons was obtained at a 63% CO conversion at 400 °C and 4.0 MPa. Among C 5+ hydrocarbons, aromatic compounds occupied 80% .…”

Section: State Of the Art Of Syngas Chemistry And The Challenges For ...mentioning

confidence: 99%

Oxide–Zeolite-Based Composite Catalyst Concept That Enables Syngas Chemistry beyond Fischer–Tropsch Synthesis

et al. 2021

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Syngas chemistry has been under study since Fischer−Tropsch synthesis (FTS) was invented in the 1920s. Despite the successful applications of FTS as the core technology of coal-to-liquid and gas-to-liquid processes in industry, the product selectivity control of syngas conversion still remains a great challenge, particularly for value-added chemicals such as light olefins. Recent studies show that the catalyst design concept of OXZEO (oxide−zeolite-based composite) enables direct syngas conversion to mixed light olefins with a selectivity reaching 80% and to ethylene with a selectivity of 83% among hydrocarbons. They both well-surpass the limits predicated by the Anderson−Schultz−Flory model via the conventional FTS route (58% and 30%, respectively). Furthermore, this catalyst concept allows one-step synthesis of gasoline-range isoparaffins and aromatic compounds, which is otherwise not possible in conventional FTS. A rapidly growing number of studies demonstrate the versatility of this concept and may form a technology platform for utilization of carbon resources including coal, natural gas, and biomass via syngas to a variety of basic chemicals and fuels. However, the selectivity control mechanism is far from being understood. Therefore, we focus mainly on the catalytic roles of the bifunctionalities of OXZEO while reviewing the development of bifunctional catalysts for selective syngas conversion by taking syngas-to-light olefins as an example. With this, we intend to provide insights into the selectivity control mechanism of the OXZEO concept in order to understand the challenges and prospects for future development of much more active and more selective catalysts.

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Section: State Of the Art Of Syngas Chemistry And The Challenges For ...mentioning

confidence: 99%

Oxide–Zeolite-Based Composite Catalyst Concept That Enables Syngas Chemistry beyond Fischer–Tropsch Synthesis

et al. 2021

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“…C2–C4 hydrocarbons are typically targeted using SAPO-34 as the molecular sieve component within the hybrid catalyst mix. − C3–C4 hydrocarbons (LPG) are favored using BETA − or USY , type frameworks. Liquid hydrocarbons in the gasoline range can be made using ZSM-5 − or Ferrierite. , A similar, yet distinctly different process concept is the approach where the syntheses of methanol, dimethyl ether (DME), and gasoline are integrated into one synthesis loop with the individual reactions still taking place in two separate reactors. , …”

Section: Introductionmentioning

confidence: 99%

Production of Light Hydrocarbons from Syngas Using a Hybrid Catalyst

Nieskens

Çiftçi

Groenendijk

et al. 2017

Ind. Eng. Chem. Res.

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A hybrid catalyst consisting of a Cu-ZnO/Al2O3 methanol synthesis catalyst and a SAPO-34 molecular sieve was shown to convert syngas into a narrow mixture of short chain paraffins centered at C2–C3 with little methane and C5+ made. This product mix is expected to be an excellent cracker feedstock for the production of olefins. The hybrid catalyst system closely couples sequential reactions on each of the two independent catalysts. The function of each of the components was unraveled by performing experiments in which the reactor was loaded with discrete layers of the individual catalysts. Methanol (MeOH) synthesis over Cu-ZnO/Al2O3 is followed by methanol conversion to dimethyl ether (DME) + steam over the acidic SAPO-34 or Cu-ZnO/Al2O3 component. Simultaneously, the so generated water feeds into the water gas shift (WGS) reaction over Cu-ZnO/Al2O3, producing H2 + CO2, and the DME/MeOH undergoes methanol to olefins (MTO) conversion over SAPO-34. The olefins are subsequently hydrogenated to paraffins over the Cu-ZnO/Al2O3 and SAPO-34 catalysts using hydrogen from the feed or hydrogen produced in the WGS reaction. Comparison of fully mixed vs layered catalyst bed systems indicated that a mixed catalyst bed is preferred to give a high CO conversion and selectivity to desired paraffin products. This scheme enables high single stage conversion by consuming methanol, thereby removing the thermodynamic constraint on that reaction step. The interactions between all the reactants and catalysts in this system create a complex relationship that is probed in this paper.

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“…The processes of hydrocarbon production from methanol (MTG) and directly from synthesis gas (TIGAS) have been experimentally examined for various types of reactors including fluidised bed reactor [14], pseudoadiabatic fixed-bed reactor [2,9], monolithic reactor with parallel tubes with catalytic material deposited in the walls [15]. One of the main advantages of catalytic monolithic reactors is a very low pressure drop.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Many investigations have demonstrated the advantages of the one-stage processes using bifunctional catalysts (version c) compared with the two-stage and three-stage processes of synthesis gas conversion to gasoline [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Synthesis gas conversion into hydrocarbons (gasoline range) over bifunctional zeolite-containing catalyst: experimental study and mathematical modelling

Mysov¹,

Решетников

Степанов³

et al. 2005

Chemical Engineering Journal

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Pseudoadiabatic catalytic reactor operation for the conversion of synthesis gas into hydrocarbons (gasoline range)

Cited by 20 publications

References 6 publications

Oxide–Zeolite-Based Composite Catalyst Concept That Enables Syngas Chemistry beyond Fischer–Tropsch Synthesis

Oxide–Zeolite-Based Composite Catalyst Concept That Enables Syngas Chemistry beyond Fischer–Tropsch Synthesis

Production of Light Hydrocarbons from Syngas Using a Hybrid Catalyst

Synthesis gas conversion into hydrocarbons (gasoline range) over bifunctional zeolite-containing catalyst: experimental study and mathematical modelling

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