Experimental and Theoretical Study of the Impact of Operating Conditions on Catalytic Propane Dehydrogenation in a Fluidized Bed Reactor

Song, Chen; Wang, Jiarui; Wang, Simin; Wen, Jia

doi:10.1021/acs.iecr.2c01729

Cited by 6 publications

(4 citation statements)

References 42 publications

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“…The abundant active components, such as Pt-Sn [1][2][3][4][5][6], CrO x [7][8][9][10][11][12][13], VO x [14-21], GaO x [22][23][24][25] , and nano-carbon [26][27][28][29], are an important active species for alkane dehydrogenation. Pt-Sn catalyst has been used in UOP industrial process, and the CrO x -Al 2 O 3based catalyst has been industrialized in the Catofin process.…”

Section: Overview Of Catalytic Conversion Routes Of Light Alkanesmentioning

confidence: 99%

“…And a high reaction temperature or high reactant concentration will lead to thermal cracking and the formation of coke, thereby decreasing catalytic efficiency. Therefore, it is of great significance to develop catalysts with high selectivity, activity, and coke resistance ability.The abundant active components, such as Pt-Sn [1-6], CrO x[7][8][9][10][11][12][13], VO x [14-21], GaO x[22][23][24][25] , and nano-carbon[26][27][28][29], are an important active species for alkane dehydrogenation. Pt-Sn catalyst has been used in UOP industrial process, and the CrO x -Al 2 O 3based catalyst has been industrialized in the Catofin process.…”

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confidence: 99%

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Recent Progress of Ga-Based Catalysts for Catalytic Conversion of Light Alkanes

Li¹,

Fu²,

Zhang³

et al. 2022

Catalysts

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The efficient and clean conversion of light alkanes is a research hotspot in the petrochemical industry, and the development of effective and eco-friendly non-noble metal-based catalysts is a key factor in this field. Among them, gallium is a metal component with good catalytic performance, which has been extensively used for light alkanes conversion. Herein, we critically summarize recent developments in the preparation of gallium-based catalysts and their applications in the catalytic conversion of light alkanes. First, we briefly describe the different routes of light alkane conversion. Following that, the remarkable preparation methods for gallium-based catalysts are discussed, with their state-of-the-art application in light alkane conversion. It should be noticed that the directional preparation of specific Ga species, strengthening metal-support interactions to anchor Ga species, and the application of new kinds of methods for Ga-based catalysts preparation are at the leading edge. Finally, the review provides some current limitations and future perspectives for the development of gallium-based catalysts. Recently, different kinds of Ga species were reported to be active in alkane conversion, and how to separate them with advanced in situ and ex situ characterizations is still a problem that needs to be solved. We believe that this review can provide base information for the preparation and application of Ga-based catalysts in the current stage. With these summarizations, this review can inspire new research directions of gallium-based catalysts in the catalysis conversion of light alkanes with ameliorated performances.

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Section: Overview Of Catalytic Conversion Routes Of Light Alkanesmentioning

confidence: 99%

mentioning

confidence: 99%

Recent Progress of Ga-Based Catalysts for Catalytic Conversion of Light Alkanes

Li¹,

Fu²,

Zhang³

et al. 2022

Catalysts

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“…Gas–solid fluidized beds have been extensively applied in chemical industries owing to their efficient gas–solid contacting, continuous powder handling capability, and excellent heat and mass transfer characteristics. − Mesoscopic properties related to bubbles and agglomerates have a direct impact on hydrodynamics and reaction conversion in a gas–solid fluidized bed. − …”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Bubble and Agglomerate Behaviors of Geldart B Particles in a 3D Gas–Solid Fluidized Bed Reactor

Cai,

Niu,

Yang

et al. 2024

Ind. Eng. Chem. Res.

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For Geldart B particles, published works have mostly focused on macroscopic fluid mechanics. The analysis of mesoscopic structure in 2D fluidized beds used nonintrusive techniques, such as digital image analysis. For 3D fluidized beds, pressure fluctuation was employed to estimate the size of bubbles, which measured the entire flow field without focusing on the local flow structures. In this work, the local behaviors of bubbles and agglomerates were experimentally investigated in a pilot-scale bubbling fluidized bed by an optical fiber probe. The experimental investigation explored the radial distributions of bubbles and agglomerates at various heights and superficial gas velocities. The volume fraction of the bubble phase was below 0.5, and the emulsion dominated the flow. The bubble frequency was less than 1.7 Hz, and it within the central region was greater than near the wall. The bottom of the bed had a higher bubble frequency than the upper. The bubble chord length, remaining almost 45 mm, was approximately 3 times greater than that observed in the Geldart A particles. The result showed that Geldart B particles are characterized by larger size and lower frequency of bubbles compared to Geldart A particles. Moreover, the agglomeration frequency remained below 0.6 Hz. The force balance analysis further presented that aggregation was less likely for Geldart B particles.

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“…Dense gas–solid fluidized beds have gained widespread application in various modern industrial fields, such as fluid catalytic cracking, biomass gasification, and olefin polymerization, due to their notable advantages in mixing, heat and mass transfer, and continuous particle handling capacity. , …”

Section: Introductionmentioning

confidence: 99%

Estimation of Particle Dispersion Characteristics in a Fluidized Bed with the Binary Mixture of Geldart A and B Types Using the Optical Fiber Probe Method

Song,

Liu,

Wang

et al. 2024

Ind. Eng. Chem. Res.

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This study proposes a novel method for experimentally assessing particle dispersion characteristics within a binary-mixture fluidized bed. Verification experiments were conducted, demonstrating satisfactory agreement between the measured results obtained from the optical fiber probe and actual values. Using this method, investigations were carried out to elucidate the flow mechanisms and the influence of key operational parameters on the radial, axial, and overall particle dispersion characteristics. The findings reveal that particle dispersion within the binary-mixture fluidized bed is influenced by the viscous stresses between particles and the initial packing state. Specifically, Geldart-A particles act as the flotsam phase, while Geldart-B particles serve as the jetsam phase. When the initial packing ratio of the flotsam phase exceeds 70%, viscous stresses between particles primarily govern the dispersion characteristics. Increasing the superficial gas velocity weakens the viscosity effect, enhancing radial and axial dispersion uniformity. Conversely, when the initial packing ratio of the jetsam phase surpasses 70%, the dispersion characteristics are predominantly influenced by the saturation degree of the particle packing. Higher gas velocity exerts a greater impact on radial dispersion as well as axial and overall dispersion characteristics. Generally, a higher flotsam phase packing ratio or superficial gas velocity promotes a more uniform particle dispersion within the bed. The proposed optical fiber probe method proves to be effective in measuring particle dispersion in binary-mixture systems, contributing to advancements in measurement theories and techniques for industrial binary-mixture fluidization.

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Experimental and Theoretical Study of the Impact of Operating Conditions on Catalytic Propane Dehydrogenation in a Fluidized Bed Reactor

Cited by 6 publications

References 42 publications

Recent Progress of Ga-Based Catalysts for Catalytic Conversion of Light Alkanes

Recent Progress of Ga-Based Catalysts for Catalytic Conversion of Light Alkanes

Experimental Investigation on Bubble and Agglomerate Behaviors of Geldart B Particles in a 3D Gas–Solid Fluidized Bed Reactor

Estimation of Particle Dispersion Characteristics in a Fluidized Bed with the Binary Mixture of Geldart A and B Types Using the Optical Fiber Probe Method

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