A method for modeling a catalytic distillation process based on seepage catalytic packing internal

Zhang, Hui; Li, Xingang; Gao, Xin; Li, Hong

doi:10.1016/j.ces.2013.07.030

Cited by 15 publications

(9 citation statements)

References 27 publications

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“…Moreover, the results for all the elements have acceptable symmetry considering the generally high errors in the second moment experiment. 9 Therefore, the assumption of axis symmetric used in the previous analysis is reasonable. Figure 9 shows t m at all the test points in the Winpak-250X reaction element.…”

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 99%

“…5−7 Modern structured catalytic column internals have played a significant role in expending the fields of application of reactive distillation and extending its use to new applications. 1,8,9 The selection of appropriate column internals for specific catalytic distillation processes is an essential design element. 10 The application of modular catalytic structured packing (MCSP), for example, Multipak, 6,11 Katapak-SP 12,13 is development tendency.…”

Section: Introductionmentioning

confidence: 99%

“…Catalytic distillation, which combines heterogeneous catalysis and continuous distillation, is one of the most widely used intensification processes. − It has received increasing attention due to relatively low investment and operating costs, low energy consumption, steady multiphase operation, and environmental friendless. − Modern structured catalytic column internals have played a significant role in expending the fields of application of reactive distillation and extending its use to new applications. ,, The selection of appropriate column internals for specific catalytic distillation processes is an essential design element . The application of modular catalytic structured packing (MCSP), for example, Multipak, , Katapak-SP , is development tendency.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of Liquid Axial and Radial Dispersion in Winpak Modular Catalytic Structured Packing

Xiang

Ding

et al. 2016

Ind. Eng. Chem. Res.

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The response technique was employed to investigate the axial and radial dispersion characteristics of the liquid phase in modular catalytic structured packing (MCSP) reaction elements. Residence time distribution (RTD) experiments were performed at ambient temperature and atmospheric pressure. A two-dimensional dispersion model was solved analytically to determine the axial and radial dispersion coefficients and the dynamic liquid holdup from the RTD curves. Three different reaction elements containing Winpak packing sheets, Mellapak packing sheets, or only catalytic particles were employed. The radial dispersion coefficient in these structures is approximately 1−2 orders of magnitude higher than the axial dispersion coefficient. The axial and radial dispersion coefficients in the Winpak elements are greater than those in the other structures. Thus, it can be concluded that the liquid dispersion characteristics in the Winpak elements are satisfactory. These measured dispersion coefficients enable the reliable and predictive design and construction of scale-up models.

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Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of Liquid Axial and Radial Dispersion in Winpak Modular Catalytic Structured Packing

Xiang

Ding

et al. 2016

Ind. Eng. Chem. Res.

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“…The experiments about hydrodynamics performances in the column (600 mm inner diameter, 1500 mm height) have been performed by Gao et al to evaluate the liquid flow behaviors and pressure drop. , Compared to two other conventional column internals, Sulzer Katapak-SP 12 and catalyst bundles, the novel structure of SCPI resulted in a significantly decreased pressure drop in the column, and the liquid holdup of the SCPI was always higher within the range of acceptable performance for an equivalent catalyst loading . Based on the hydrodynamic experiments, rigorous mathematical models have been proposed by Li et al and Zhang et al to predict the pressure drop of the SCPI and composition profiles for catalytic distillation processes. However, no reactive distillation experiments using SCPI have been reported.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 9. Concentration profiles of different feeding modes: (a) AmOH (12)-HAc (12), (b) AmOH (12)-HAc(13), and (c) AmOH (12)-HAc(20).…”

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confidence: 99%

Synthesis of n-Amyl Acetate in a Pilot Plant Catalytic Distillation Column with Seepage Catalytic Packing Internal

Xiao

et al. 2017

Ind. Eng. Chem. Res.

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The n-amyl acetate synthesis from the esterification reaction of acetic acid and n-amyl alcohol in a pilot plant catalytic distillation column with a decanter was evaluated. A novel catalytic packing, seepage catalytic packing internal (SCPI), is applied in this study. Catalytic distillation experiments using different feed molar ratios and feed modes at different column pressures were performed to validate an equilibrium stage model developed to investigate the influence of operation parameters on the performance of the catalytic distillation process. The results from experimental runs and simulations clearly indicate that it is important to the performance of catalytic distillation process to adjust the composition and temperature profiles along the reaction zone. The studies also showed that the integration of a reactive distillation column with a decanter is considered a potential candidate to produce amyl acetate. With proper operation parameters (operating pressure of 20−22 kPa and mixed feeding mode) and column configuration (16−18 theoretical stages of reaction zone), the product purity in the bottom stream could be increased to 99.3 wt % and less than 0.2 mg KOH/g acid value, meanwhile the conversion of amyl alcohol could reach more than 95%. The research achievements can be applied to facilitate industrial application of SCPI and used for prospective optimization studies.

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State‐of‐the‐Art of Advanced Distillation Technologies in China

et al. 2016

Chem Eng & Technol

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Focusing on energy conservation and process intensification, a comprehensive overview of advanced distillation technologies in the past four decades in China is presented. Novel trays, packings, and gas and liquid distributors based on the fundamentals of such technologies are described. Hybrid distillation and distillation assisted by an external force field on the basis of process intensification principles like reactive distillation, extractive distillation, Higee technology, microwaveassisted distillation, etc. are reported. Energy-saving technologies such as dividing-wall column and internally heat integrated distillation column together with some important examples regarding the industrial application of advanced distillation technologies are evaluated. As a guide to develop distillation processes, a green distillation concept is proposed. Future perspectives of distillation techniques in China are indicated.

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A method for modeling a catalytic distillation process based on seepage catalytic packing internal

Cited by 15 publications

References 27 publications

Experimental Investigation of Liquid Axial and Radial Dispersion in Winpak Modular Catalytic Structured Packing

Experimental Investigation of Liquid Axial and Radial Dispersion in Winpak Modular Catalytic Structured Packing

Synthesis of n-Amyl Acetate in a Pilot Plant Catalytic Distillation Column with Seepage Catalytic Packing Internal

State‐of‐the‐Art of Advanced Distillation Technologies in China

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