Modeling of the Methanol Synthesis Catalyst Deactivation in a Spherical Bed Reactor: An Environmental Challenge

Sadeghi, Soheil; Vafajoo, Leila; Kazemeini, Mohammad; Fattahi, Moslem

doi:10.1016/j.apcbee.2014.10.021

Cited by 11 publications

(3 citation statements)

References 13 publications

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“…The other way to prevent sintering is to use promoters/protectors or complex bi-or tri-metallic catalysts. It was identified that the sintering of copper in the Cu/ZnO/Al 2 O 3 catalysts is one of the deactivation mechanisms in methanol synthesis [244][245][246]. In situ XRD tests were conducted for Cu/ZnO/Al 2 O 3 catalyst in the temperature range from 110 • C to 640 • C in a reduction atmosphere.…”

Section: Study Of the Process Of The Deactivation Of Catalystsmentioning

confidence: 99%

In Situ X-ray Diffraction as a Basic Tool to Study Oxide and Metal Oxide Catalysts

Bulavchenko,

Vinokurov

2023

Catalysts

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X-ray diffraction (XRD) is a standard technique that is widely applied in heterogeneous catalysis to determine phase composition, atomic structure, and size of crystallites. This review is focused on the application of in situ XRD for studying the catalysts during their “lifetime” (under synthesis, activation, operation, and deactivation conditions), limiting the objects of research to oxide and metal oxide catalysts. Also included is a brief overview of modern techniques and instruments and the latest works illustrating different aspects of this technique in catalyst research. The main conclusion is that the field of heterogeneous catalysis research would benefit substantially from the application of in situ XRD for the structural, phase, and morphological characterization of solid catalysts. Even more useful information can be obtained if XRD is combined with other techniques that are more sensitive at length scales different from that of XRD.

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Section: Study Of the Process Of The Deactivation Of Catalystsmentioning

confidence: 99%

In Situ X-ray Diffraction as a Basic Tool to Study Oxide and Metal Oxide Catalysts

Bulavchenko,

Vinokurov

2023

Catalysts

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“…Particularly, Sadeghi et al [29] proposed a mathematical model for a spherical catalytic reactor in which the long term catalyst deactivation was considered. They studied the catalyst deactivation and reactor performance as a function of different parameters in the reactor and reaction.…”

Section: -Continues Packed Bed Spherical Reactorsmentioning

confidence: 99%

Progress in spherical packed-bed reactors: Opportunities for refineries and chemical industries

Iranshahi

Sani

Pourazadi

et al. 2018

Chemical Engineering and Processing - Process Intensification

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“…Many investigations focus on modeling of catalytic methanol synthesis reactor [7,[11][12][13][14][15][16][17]. In summary, Elnashaie and Wagialla [18] studied methanol production by the fluidized-bed reactor.…”

Section: Introductionmentioning

confidence: 99%

Development of Two Novel Processes for Hydrogenation of CO2 to Methanol over Cu/ZnO/Al2O3 Catalyst to Improve the Performance of Conventional Dual Type Methanol Synthesis Reactor

2018

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Conventional methanol synthesis process (CR configuration) consists of water-cooled and gas-cooled reactors in which methanol and water are condensed inside the gas-cooled reactor which deactivates the catalyst. In this study, two novel configurations (AW and ACW configurations) are represented to address this problem in which the gas-cooled reactor is replaced with adiabatic reactor. Moreover, a condenser is applied between adiabatic and water-cooled reactors in ACW configuration. Results show that temperature increases somewhat along the adiabatic reactor that prevents gas condensate formation. Besides, the adiabatic reactor maximum temperature is less than that of first reactor in CR configuration which prevents copper based catalyst thermal sintering. Moreover, a high cross section-to-length ratio of the adiabatic reactor leads to negligible pressure drop along the reactor and improvement in CO 2 conversion to methanol that has positive environmental effects. Also, water mole fraction decreases along the reactors of AW and ACW configurations to prevent the deactivation of catalyst active sites. Eventually, methanol production rates by AW and ACW configurations are improved around 25.5% and 43.1% in comparison with CR configuration. So, novel AW and ACW configurations provide many benefits including improvement in catalyst activity and durability, CO 2 conversion, and the methanol production rate.

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Modeling of the Methanol Synthesis Catalyst Deactivation in a Spherical Bed Reactor: An Environmental Challenge

Cited by 11 publications

References 13 publications

In Situ X-ray Diffraction as a Basic Tool to Study Oxide and Metal Oxide Catalysts

In Situ X-ray Diffraction as a Basic Tool to Study Oxide and Metal Oxide Catalysts

Progress in spherical packed-bed reactors: Opportunities for refineries and chemical industries

Development of Two Novel Processes for Hydrogenation of CO2 to Methanol over Cu/ZnO/Al2O3 Catalyst to Improve the Performance of Conventional Dual Type Methanol Synthesis Reactor

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