Rotating Packed Bed

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Guang-wen Chu - One of the best experts on this subject based on the ideXlab platform.

Jian-feng Chen - One of the best experts on this subject based on the ideXlab platform.

  • Gas Flow in a Multiliquid-Inlet Rotating Packed Bed: Three-Dimensional Numerical Simulation and Internal Optimization
    Industrial & Engineering Chemistry Research, 2018
    Co-Authors: Yong Luo, Haikui Zou, Guang-wen Chu, Yi Liu, Jian-feng Chen
    Abstract:

    A novel multiliquid-inlet Rotating Packed Bed (MLI-RPB), compared to the conventional RPB, was demonstrated to result in higher gas–liquid mass-transfer in our previous studies (Chu et al., Ind. En...

  • cfd modeling of gas liquid mass transfer process in a Rotating Packed Bed
    Chemical Engineering Journal, 2016
    Co-Authors: Yucheng Yang, Haikui Zou, Guang-wen Chu, Baochang Sun, Moses Arowo, Yang Xiang, Jian-feng Chen
    Abstract:

    Abstract Process intensification by Rotating Packed Bed (RPB) has attracted wide attention in the recent years. In particular, its high gas–liquid mass transfer efficiency is proved by plentiful experimental data. However, due to the complex structure of packing in the RPB, it is extremely difficult to acquire detailed information about mass transfer process inside the reactor by experiments. Therefore, this study firstly employed computational fluid dynamics (CFD) modeling technique to analyze mass transfer process in a Rotating Packed Bed (RPB) by adding user defined function (UDF) programming to Fluent solver in order to expand its abilities to RPB. The simulation results were compared with previous correlation data on liquid holdup and the calculated values of mass transfer process were matched with experimental values of vacuum deaeration process in RPB. The results revealed liquid flow and mass transfer process inside the reactor and were also in agreement with the experimental data. Additionally, three optimum designs of RPB (kinds of packing, size of rotors and blades added in packing) were developed to improve the mass transfer efficiency. The results show high removal efficiency in the small Δ d packing and the rotor with larger inner and outer diameter, and the packing with blades can improve mass transfer efficiency compared to the conventional one. The CFD technique was generally found to be an important and effective tool for analyzing and optimizing RPBs.

  • studies of co2 absorption and effective interfacial area in a two stage Rotating Packed Bed with nickel foam packing
    Chemical Engineering and Processing, 2015
    Co-Authors: Guang-wen Chu, Haikui Zou, Yong Luo, Le Sang, Jian-feng Chen
    Abstract:

    Abstract A two-stage Rotating Packed Bed with nickel foam packing (TSNF-RPB) was developed with the purpose of simplifying the combination of rotational packing and static rings in the rotor of a two-stage counter-current Rotating Packed Bed (TSCC-RPB). A novel method called “five-point” was employed to determine the CO2 absorption efficiency (η) and the effective interfacial area (ae) in this TSNF-RPB. Experimental results showed that the CO2 absorption efficiency of the upper and the lower packing zones were obviously higher than that of the upper and the lower cavity zones at different rotational speed, gas and liquid flow rate. Values of ae of the upper packing zone were higher than that of the lower packing zone when the nickel foam packing with pore size of 0.64 mm was loaded. The TSNF-RPB has potential prospects for the applications of chemical processes which require long gas–liquid contact time.

  • Mass-Transfer Studies in a Novel Multiliquid-Inlet Rotating Packed Bed
    Industrial & Engineering Chemistry Research, 2014
    Co-Authors: Guang-wen Chu, Haikui Zou, Lei Shao, Yong Luo, Zi-yu Xing, Le Sang, Jian-feng Chen
    Abstract:

    End effect is a significant phenomenon in a Rotating Packed Bed (RPB). The mass transfer accomplished in the end zone can be one magnitude higher than what is achieved in the bulk zone of the packing. In order to make full use of the end effect, a novel multiliquid-inlet Rotating Packed Bed (MLI-RPB) was developed, which artificially created the extra end zones in the bulk zone along the radial direction of the rotor. The effective interfacial area (a) and liquid-side volumetric mass-transfer coefficient (kLa) of the MLI-RPB were measured using a system of CO2 chemisorption into NaOH solution. Mass-transfer experiments were also conducted in a traditional RPB with the same size as the MLI-RPB. Compared with the traditional RPB, higher values of a and kLa were obtained in the MLI-RPB, showing a great potential for the industrial applications.

  • Distillation studies in a two-stage counter-current Rotating Packed Bed
    Separation and Purification Technology, 2013
    Co-Authors: Guang-wen Chu, Haikui Zou, Lei Shao, Yong Luo, Xin Gao, Jian-feng Chen
    Abstract:

    Abstract Based on the advantages and disadvantages of the conventional Rotating Packed Bed (RPB) and the Rotating zigzag Bed (RZB), a novel two-stage counter-current Rotating Packed Bed (TSCC-RPB) was developed for the continuous distillation. The present research conducted continuous distillation experiments in the TSCC-RPB using the methanol–water binary system. Experimental results show that the packing plays a significant role in enhancing the separation efficiency. To achieve a high number of theoretical trays ( N T ), the optimum rotational speed of the TSCC-RPB was about 700–800 r/min. Compared with the conventional RPB, the TSCC-RPB shows almost equivalent mass transfer efficiency and the same optimal rotational speed but can easily achieve the intermediate feed of continuous distillation. Compared with the RZB, the HETP of the TSCC-RPB, ranged from 31.16 to 47.21 mm, was smaller than that of the RZB ranged from 50.00 to 66.67 mm. The optimal rotational speed of the TSCC-RPB was also much lower than that of the RZB of 1000 r/min.

Haikui Zou - One of the best experts on this subject based on the ideXlab platform.

  • Simultaneous Absorption of H2S and CO2 into the MDEA + PZ Aqueous Solution in a Rotating Packed Bed
    Industrial & Engineering Chemistry Research, 2020
    Co-Authors: Junlei Zhan, Guang-wen Chu, Baochang Sun, Beibei Wang, Liangliang Zhang, Haikui Zou
    Abstract:

    This work presented experimental and modeling studies on the simultaneous absorption of H2S and CO2 into the N-methyldiethanolamine (MDEA) and piperazine (PZ) solution in a Rotating Packed Bed (RPB...

  • Gas Flow in a Multiliquid-Inlet Rotating Packed Bed: Three-Dimensional Numerical Simulation and Internal Optimization
    Industrial & Engineering Chemistry Research, 2018
    Co-Authors: Yong Luo, Haikui Zou, Guang-wen Chu, Yi Liu, Jian-feng Chen
    Abstract:

    A novel multiliquid-inlet Rotating Packed Bed (MLI-RPB), compared to the conventional RPB, was demonstrated to result in higher gas–liquid mass-transfer in our previous studies (Chu et al., Ind. En...

  • cfd modeling of gas liquid mass transfer process in a Rotating Packed Bed
    Chemical Engineering Journal, 2016
    Co-Authors: Yucheng Yang, Haikui Zou, Guang-wen Chu, Baochang Sun, Moses Arowo, Yang Xiang, Jian-feng Chen
    Abstract:

    Abstract Process intensification by Rotating Packed Bed (RPB) has attracted wide attention in the recent years. In particular, its high gas–liquid mass transfer efficiency is proved by plentiful experimental data. However, due to the complex structure of packing in the RPB, it is extremely difficult to acquire detailed information about mass transfer process inside the reactor by experiments. Therefore, this study firstly employed computational fluid dynamics (CFD) modeling technique to analyze mass transfer process in a Rotating Packed Bed (RPB) by adding user defined function (UDF) programming to Fluent solver in order to expand its abilities to RPB. The simulation results were compared with previous correlation data on liquid holdup and the calculated values of mass transfer process were matched with experimental values of vacuum deaeration process in RPB. The results revealed liquid flow and mass transfer process inside the reactor and were also in agreement with the experimental data. Additionally, three optimum designs of RPB (kinds of packing, size of rotors and blades added in packing) were developed to improve the mass transfer efficiency. The results show high removal efficiency in the small Δ d packing and the rotor with larger inner and outer diameter, and the packing with blades can improve mass transfer efficiency compared to the conventional one. The CFD technique was generally found to be an important and effective tool for analyzing and optimizing RPBs.

  • studies of co2 absorption and effective interfacial area in a two stage Rotating Packed Bed with nickel foam packing
    Chemical Engineering and Processing, 2015
    Co-Authors: Guang-wen Chu, Haikui Zou, Yong Luo, Le Sang, Jian-feng Chen
    Abstract:

    Abstract A two-stage Rotating Packed Bed with nickel foam packing (TSNF-RPB) was developed with the purpose of simplifying the combination of rotational packing and static rings in the rotor of a two-stage counter-current Rotating Packed Bed (TSCC-RPB). A novel method called “five-point” was employed to determine the CO2 absorption efficiency (η) and the effective interfacial area (ae) in this TSNF-RPB. Experimental results showed that the CO2 absorption efficiency of the upper and the lower packing zones were obviously higher than that of the upper and the lower cavity zones at different rotational speed, gas and liquid flow rate. Values of ae of the upper packing zone were higher than that of the lower packing zone when the nickel foam packing with pore size of 0.64 mm was loaded. The TSNF-RPB has potential prospects for the applications of chemical processes which require long gas–liquid contact time.

  • Mass-Transfer Studies in a Novel Multiliquid-Inlet Rotating Packed Bed
    Industrial & Engineering Chemistry Research, 2014
    Co-Authors: Guang-wen Chu, Haikui Zou, Lei Shao, Yong Luo, Zi-yu Xing, Le Sang, Jian-feng Chen
    Abstract:

    End effect is a significant phenomenon in a Rotating Packed Bed (RPB). The mass transfer accomplished in the end zone can be one magnitude higher than what is achieved in the bulk zone of the packing. In order to make full use of the end effect, a novel multiliquid-inlet Rotating Packed Bed (MLI-RPB) was developed, which artificially created the extra end zones in the bulk zone along the radial direction of the rotor. The effective interfacial area (a) and liquid-side volumetric mass-transfer coefficient (kLa) of the MLI-RPB were measured using a system of CO2 chemisorption into NaOH solution. Mass-transfer experiments were also conducted in a traditional RPB with the same size as the MLI-RPB. Compared with the traditional RPB, higher values of a and kLa were obtained in the MLI-RPB, showing a great potential for the industrial applications.

Yong Luo - One of the best experts on this subject based on the ideXlab platform.

Lei Shao - One of the best experts on this subject based on the ideXlab platform.

  • Study on the Efficient Production of Ozone Water by a Rotating Packed Bed
    Industrial & Engineering Chemistry Research, 2019
    Co-Authors: Liu Taoran, Dan Wang, Wang Wei, Lei Shao
    Abstract:

    This work employed a Rotating Packed Bed (RPB) as an ozone contactor to produce ozone water. The effects of various operating conditions including the rotational speed of RPB, the gas and liquid vo...

  • Ozonation of polyoxymethylene effluent in a Rotating Packed Bed.
    Environmental technology, 2017
    Co-Authors: Dan Wang, Liu Taoran, Wang Wei, Shan Mingjun, Moses Arowo, Lei Shao
    Abstract:

    ABSTRACTThis work aimed to investigate the effectiveness of ozone in degradation of polyoxymethylene (POM) effluent in a Rotating Packed Bed (RPB) (O3-RPB system). The degradation efficiency was evaluated in terms of chemical oxygen demand (COD), 5-day biological oxygen demand (BOD5) and BOD5/COD under various operating conditions. Pilot experiments comprising the O3-RPB unit coupled with a biological contact oxidation unit were also carried out. The COD removal rates in the pilot process increased markedly to about 70–85% compared to about 40% in the original treatment process, which is the tertiary aerobic treatment in the plant, confirming that the O3-RPB system is very efficient in improving the biodegradability of the POM effluent.

  • Rotating Packed Bed reactor for enzymatic synthesis of biodiesel
    Bioresource Technology, 2017
    Co-Authors: Changsheng Liu, Lei Shao, Meng Wang, Li Deng, Kaili Nie, Fang Wang
    Abstract:

    The aim of the present work was to study the applicability of Rotating Packed Bed (RPB) for biodiesel through the biocatalytic method. In this research, the RPB facilitated a more homogeneous mixture of substrates due to its higher mass transfer efficiency and better micromixing environment. This was superior to the traditional continuous stirred tank reactor (CSTR) system. Candida sp. 99-125 lipase was used without any organic solvent or additive, and demonstrated a significant catalyst efficiency. The key factors, such as the high gravity factor (β), pattern of the catalyst and methanol-FFA molar ratio etc. were investigated. Under the optimal conditions, the hydrolysis yield of fatty acids was 97.0% after 24h and the esterification yield of biodiesel was 96.0% 6h later. The esterifying yield didn't have an obvious decline in the fifth batch. Consequently, the RPB is an attractive and effective reactor for enzymatic synthesis.

  • Mass-Transfer Studies in a Novel Multiliquid-Inlet Rotating Packed Bed
    Industrial & Engineering Chemistry Research, 2014
    Co-Authors: Guang-wen Chu, Haikui Zou, Lei Shao, Yong Luo, Zi-yu Xing, Le Sang, Jian-feng Chen
    Abstract:

    End effect is a significant phenomenon in a Rotating Packed Bed (RPB). The mass transfer accomplished in the end zone can be one magnitude higher than what is achieved in the bulk zone of the packing. In order to make full use of the end effect, a novel multiliquid-inlet Rotating Packed Bed (MLI-RPB) was developed, which artificially created the extra end zones in the bulk zone along the radial direction of the rotor. The effective interfacial area (a) and liquid-side volumetric mass-transfer coefficient (kLa) of the MLI-RPB were measured using a system of CO2 chemisorption into NaOH solution. Mass-transfer experiments were also conducted in a traditional RPB with the same size as the MLI-RPB. Compared with the traditional RPB, higher values of a and kLa were obtained in the MLI-RPB, showing a great potential for the industrial applications.

  • Distillation studies in a two-stage counter-current Rotating Packed Bed
    Separation and Purification Technology, 2013
    Co-Authors: Guang-wen Chu, Haikui Zou, Lei Shao, Yong Luo, Xin Gao, Jian-feng Chen
    Abstract:

    Abstract Based on the advantages and disadvantages of the conventional Rotating Packed Bed (RPB) and the Rotating zigzag Bed (RZB), a novel two-stage counter-current Rotating Packed Bed (TSCC-RPB) was developed for the continuous distillation. The present research conducted continuous distillation experiments in the TSCC-RPB using the methanol–water binary system. Experimental results show that the packing plays a significant role in enhancing the separation efficiency. To achieve a high number of theoretical trays ( N T ), the optimum rotational speed of the TSCC-RPB was about 700–800 r/min. Compared with the conventional RPB, the TSCC-RPB shows almost equivalent mass transfer efficiency and the same optimal rotational speed but can easily achieve the intermediate feed of continuous distillation. Compared with the RZB, the HETP of the TSCC-RPB, ranged from 31.16 to 47.21 mm, was smaller than that of the RZB ranged from 50.00 to 66.67 mm. The optimal rotational speed of the TSCC-RPB was also much lower than that of the RZB of 1000 r/min.

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