Modeling of a pilot-scale trickle bed reactor for the catalytic oxidation of phenol

Wu, Qiang; Hu, Xijun; Yue, Po Lock; Feng, Jian Q.; Chen, Xi; Zhang, Huiping; Qiao, Shi Zhang

doi:10.1016/j.seppur.2009.03.021

Cited by 16 publications

(6 citation statements)

References 32 publications

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“…Activated carbons (ACs) are of interest as adsorbent in spray coating, food processing, pharmaceuticals, chemical, petroleum, mining, and nuclear industries, and are used for automobiles as catalyst base [1,2], air conditioner or air purifier, water treatment [3,4], and desulfurization of diesel fuel [5]. ACs are applied also to reduce volatile organic compounds from a variety of process streams due to environmental concerns [6,7].…”

Section: Introductionmentioning

confidence: 99%

Regeneration of Activated Carbon Loaded with Cyclohexane Using Supercritical Carbon Dioxide: Experimental Results and Modeling

2013

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Regeneration of granular activated carbon loaded with cyclohexane by supercritical carbon dioxide was investigated at varying temperatures and pressures. Cyclohexane concentration-time profiles were measured by means of a supercritical extraction apparatus coupled with an online GC analyzer. The maximum yield of regeneration was 68 % at 55°C and 140 bar. A mathematical model was proposed which agreed well with the experimental data. Both the Toth and the Langmuir-Freundlich isotherms were used as adsorption isotherms under equilibrium condition. The mathematical model for activated carbon regeneration was able to adjust the experimental data with relative absolute average deviations of about 4 % and 3.25 %, respectively, for the Toth and the Langmuir-Freundlich isotherms.

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Section: Introductionmentioning

confidence: 99%

Regeneration of Activated Carbon Loaded with Cyclohexane Using Supercritical Carbon Dioxide: Experimental Results and Modeling

2013

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“…Wu et al . neglected in their one‐dimensional model the longitudinal dispersion, because the experimental results indicated that this phenomenon plays a minor role in the process.…”

Section: Introductionmentioning

confidence: 99%

“…Wu et al 42 neglected in their one-dimensional model the longitudinal dispersion, because the experimental results indicated that this phenomenon plays a minor role in the process. The parameters of the reaction rate equation and correlations of transport phenomena necessary in the model were estimated in special experiments.…”

Section: Introductionmentioning

confidence: 99%

Modelling wet‐air oxidation of phenol in a trickle‐bed reactor using active carbon as a catalyst

Janecki

Szczotka

Burghardt

et al. 2014

J of Chemical Tech & Biotech

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BACKGROUND Catalytic wet air oxidation (CWAO) of phenol in a trickle‐bed reactor has been investigated (operating parameters: P=1.85 MPa, T=393, 413, 433 K, L=0.17–1.77 kg m−2 s−1 and G=0.2–0.62 kg m−2 s−1). Activated carbon was used as a catalyst. The experimental results have been simulated by Eulerian multifluid model (CFD) and for comparison by the plug flow model. RESULTS The experiments proved that active carbon can be applied as a catalyst in the phenol oxidation processes revealing a catalytic activity comparable with that of commonly used metal oxides. The highest conversion of phenol obtained in long‐lasting experimental runs carried out at stable catalytic activity (PO2 = 0.31 MPa, T=413 K) was about 60%. Computed results show that the CFD model approximates better the experimental data (mean error 11.6%; standard deviation 5.2%) than the plug flow model (mean error 16.9%; standard deviation 12.2%). CONCLUSION CWAO of phenol over active carbon as a catalyst cannot be applied as an independent purification method. To remove phenol completely CWAO must be combined with other depolluting technology. The CFD model describes better the hydrodynamic phenomena in a bed of variable porosity than the simple plug flow model. © 2014 Society of Chemical Industry

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“…Hidrógeno en las tres fases: La última condición de frontera en z * =1 con la derivada (ecuaciones 5.13 a), se consideró de una manera similar a varias publicaciones [111], [126], [127], además, el subíndice e significa la condición de entrada. Estas ecuaciones se resolvieron discretizandolas por el método de diferencias finitas (apéndice C) para después programarlas mediante el programa Matlab.…”

Section: Reacción De Hds Del Dbt Utilizando Los Dos Modelos: Dispersi...unclassified

“…En la Figura 6.3, se muestran los resultados de las fracciones del 4,6-DMDBT y del hidrógeno en las distintas interfases, a una presión de 2.5 MPa y una temperatura de 593 K (de manera similar a la Figura 6.2). A diferencia del caso anterior, el dato teórico se ajustó al experimental, además, se puede ver que si hay una diferencia entre las fracciones del hidrógeno en la fase líquida y sólida, a partir de lo anterior se tienen dos aspectos importantes: a) Se tiene resistencia en la interfase líquido-sólido (L-S) considerando esta gráfica, de acuerdo a varios autores [44], [102], [127], corroborado con los criterios de Satterfield et al [80] y Mills et al [81].…”

Section: Transferencia De Masa En El Reactor De Lecho Escurridounclassified

Estudio cinético y análisis de un micro reactor de lecho escurrido para hidrodesulfuración

Martínez

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Modeling of a pilot-scale trickle bed reactor for the catalytic oxidation of phenol

Cited by 16 publications

References 32 publications

Regeneration of Activated Carbon Loaded with Cyclohexane Using Supercritical Carbon Dioxide: Experimental Results and Modeling

Regeneration of Activated Carbon Loaded with Cyclohexane Using Supercritical Carbon Dioxide: Experimental Results and Modeling

Modelling wet‐air oxidation of phenol in a trickle‐bed reactor using active carbon as a catalyst

Estudio cinético y análisis de un micro reactor de lecho escurrido para hidrodesulfuración

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