A comparative study on three reactor types for methanol synthesis from syngas and CO2

Cui, Xiaoti; Kær, Søren Knudsen

doi:10.1016/j.cej.2020.124632

Cited by 73 publications

(36 citation statements)

References 44 publications

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“…This heat accumulation was recently studied by Cui et al by comparing three fixed bed reactor types (the adiabatic, water-cooled and gas-cooled reactor). 280 The simulation results showed that in the adiabatic and the gas-cooled reactor the hot spot temperatures inside the system can be within the typical operating temperature range for the catalyst and only the water-cooled system showed advantages in terms of efficient heat removal. Finally, when looking at ASPEN process simulations, a similar trend is again observed [281][282][283][284][285][286][287] with most of the works being done in the methanol pathway field, 281-285 probably owing to the easier downstream separation of this process.…”

Section: Process Design Considerationsmentioning

confidence: 94%

Advances in the Design of Heterogeneous Catalysts and Thermocatalytic Processes for CO₂ Utilization

et al. 2020

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Utilization of CO2 as feedstock to produce fine chemicals and renewable fuels is a highly promising field, which presents unique challenges in its implementation at scale. Heterogeneous catalysis with its simple operation and industrial compatibility can be an effective means of achieving this challenging task. This review summarizes the current developments in heterogeneous thermal catalysis for the production of carbon monoxide, alcohols and hydrocarbons from CO2. A detailed discussion is provided regarding structure-activity correlations between catalyst surface and intermediate species which can aid in rational design of future generation catalysts. Effects of active metal components, catalyst supports, and promoters are discussed in each section, which will guide researchers to synthesize new catalysts with improved selectivity and stability. Additionally, a brief overview regarding process design considerations has been provided. Future research directions are proposed with special emphasis on the application scope of new catalytic materials and possible approaches of increasing catalyst performance.

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Section: Process Design Considerationsmentioning

confidence: 94%

Advances in the Design of Heterogeneous Catalysts and Thermocatalytic Processes for CO₂ Utilization

et al. 2020

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“…Some of the most commonly used kinetic models for methanol synthesis are the models provided by Graaf 13,[34][35][36][37] and Vanden Bussche and Froment. 15,[38][39][40][41] Graaf's kinetic model is based on the stepwise hydration of CO and CO 2 with the rate determining step (rds) determined by an error discussion of the 48 possible combinations of rds of COhydrogenation, CO 2 -hydrogenation and reverse WGS (rWGS). 13,42,43 In contrast to the mechanism applied by Graaf, Bussche and Froment considered a different reaction mechanism based only on CO 2 -hydrogenation coupled with rWGS via the formyl species.…”

Section: Reaction Chemistry and Engineering Papermentioning

confidence: 99%

A novel approach for kinetic measurements in exothermic fixed bed reactors: advancements in non-isothermal bed conditions demonstrated for methanol synthesis

et al. 2021

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“…Our recent study has shown that the incorporation of Ga into MnO x significantly enhanced the dissociation ability of H 2 , and the prepared MnGa oxide exhibited a high C 2 –C 4 = olefin selectivity of 88.3% at a CO conversion of 13.7% . The conversion of intermediate such as methanol or ketene to C 2 –C 4 = olefin over SAPO-34 requires a high temperature (400–450 °C), while the traditional methanol synthesis from syngas works at low temperatures (200–350 °C) . Thus, the bifunctional catalyst should be developed to match the reaction temperature of intermediate production and transformation to further improve the catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Syngas to Olefins over a CrMnGa/SAPO-34 Bifunctional Catalyst: Effect of Cr and Cr/Mn Ratio

Zhang

Meng

Yang

et al. 2021

Ind. Eng. Chem. Res.

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Metal oxide in a bifunctional catalyst plays crucial roles in catalytic activity for syngas conversion to olefin (STO).Here, ternary co-precipitated CrMnGa oxides with various Cr/Mn ratios were prepared and combined with SAPO-34 for an STO reaction. By adjusting the Cr:Mn:Ga atomic ratio to 3:2:1, a high CO conversion (43.5%) with light olefin selectivity (87.0%, CO 2 free) is achieved under the reaction conditions of 400 °C, 3.0 MPa, and 3000 mL•h −1 •g −1 . The increase in the Cr/Mn ratio facilitated the CrMnGa catalyst reduction and enhanced surface oxygen vacancies contents and H 2 dissociation ability. The mechanism reveals that *CH 3 O species act as the reaction intermediate for the reaction of CO with the surface OH group and the subsequent hydrogenation. More importantly, the introduction of Cr enhanced the CO activation ability at high temperatures and thus provided a well temperature match for intermediate generation over CrMnGa oxide and further transformation into light olefin over SAPO-34. This study provides a strategy for rational design of highly active metal oxides, which could be used to combine with other zeolites for syngas conversion to high value-added chemicals.

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A comparative study on three reactor types for methanol synthesis from syngas and CO2

Cited by 73 publications

References 44 publications

Advances in the Design of Heterogeneous Catalysts and Thermocatalytic Processes for CO₂ Utilization

Advances in the Design of Heterogeneous Catalysts and Thermocatalytic Processes for CO₂ Utilization

A novel approach for kinetic measurements in exothermic fixed bed reactors: advancements in non-isothermal bed conditions demonstrated for methanol synthesis

Syngas to Olefins over a CrMnGa/SAPO-34 Bifunctional Catalyst: Effect of Cr and Cr/Mn Ratio

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A comparative study on three reactor types for methanol synthesis from syngas and CO2

Cited by 73 publications

References 44 publications

Advances in the Design of Heterogeneous Catalysts and Thermocatalytic Processes for CO2 Utilization

Advances in the Design of Heterogeneous Catalysts and Thermocatalytic Processes for CO2 Utilization

A novel approach for kinetic measurements in exothermic fixed bed reactors: advancements in non-isothermal bed conditions demonstrated for methanol synthesis

Syngas to Olefins over a CrMnGa/SAPO-34 Bifunctional Catalyst: Effect of Cr and Cr/Mn Ratio

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Product

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Advances in the Design of Heterogeneous Catalysts and Thermocatalytic Processes for CO₂ Utilization

Advances in the Design of Heterogeneous Catalysts and Thermocatalytic Processes for CO₂ Utilization