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Applied Sciences
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Process Intensification via Rotating Packed Bed (Higee)
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Process Intensification via Rotating Packed Bed (Higee)

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Chemical and Molecular Sciences".

Deadline for manuscript submissions: closed (30 December 2021) | Viewed by 5773

Special Issue Editors

Prof. Dr. Guangwen Chu

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Guest Editor
Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China
Interests: process intensification; high-gravity reactor engineering; mass transfer
Prof. Dr. Baochang Sun

E-Mail Website
Guest Editor
Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China
Interests: “Higee +”; process intensification; heterogeneous catalysis; catalyst synthesis
Prof. Dr. Yong Luo

E-Mail Website
Guest Editor
Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China
Interests: high-gravity reaction engineering

Special Issue Information

Dear Colleagues,

High gravity refers to the force exerted on material in an environment, which has much larger acceleration than the Earth’s gravitational acceleration (9.8 m/s2). On Earth, a high gravity environment is usually achieved by the centrifugal force generated by rotation. High gravity devices mainly include the rotating packed bed, rotating disk, rotating baffled bed, and so on.

Under the high gravity environment created by high gravity devices, liquid is sheared into micron to nanoscale liquid droplets, film, or ligaments. In addition, fluids are highly turbulent, and the interface between them is updated rapidly. All these lead to a great enhancement of micromixing and mass transfer with 1–3 orders of magnitude higher than that in conventional devices, increasing the macroscopic reaction rate. Consequently, the production efficiency per unit equipment volume can be greatly improved to decrease the volume of a device. Therefore, high gravity technology is considered a breakthrough technology to strengthen the transfer and heterogeneous reaction process, and high gravity devices are known as “transistors of chemical industry”.

At present, high gravity technology has been successfully applied to gas absorption, dust removal, water deoxidation, wastewater treatment, biological fermentation, nanomaterial preparation, desulfurization alkali regeneration, devolatilization, catalyst synthesis, organic synthesis, distillation, electrochemical reaction, polymerization, etc., exhibiting remarkable strengthening effects. High gravity technology has drawn more and more attention, and its application field has been gradually expanded.

Prof. Dr. Guangwen Chu
Prof. Dr. Baochang Sun
Prof. Dr. Yong Luo
Guest Editors

Manuscript Submission Information

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Keywords

  • high-gravity technology
  • process intensification
  • rotating packed bed
  • rotating baffled bed
  • rotating disk
  • micromixing
  • mass transfer
  • multiphase reaction
  • absorption
  • distillation
  • De-SO2
  • De-dust
  • De-NOx
  • desorption
  • material synthesis

Published Papers (3 papers)

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18 pages, 38829 KiB  
Article
Facile Synthesis of NiCo2S4/rGO Composites in a Micro-Impinging Stream Reactor for Energy Storage
by Jiawei Zhang, Xiguan Chen, Chunyu Liu and Lixiong Wen
Appl. Sci. 2022, 12(6), 2882; https://0-doi-org.brum.beds.ac.uk/10.3390/app12062882 - 11 Mar 2022
Cited by 3 | Viewed by 1721
Abstract
Using a process-enhanced micro-impinging stream reactor (MISR) and a co-precipitation route, NiCo2S4 and NiCo2S4/rGO electrode materials were successfully prepared, respectively. Owing to its excellent micromixing performance, the MISR-prepared NiCo2S4/rGO composites had a [...] Read more.
Using a process-enhanced micro-impinging stream reactor (MISR) and a co-precipitation route, NiCo2S4 and NiCo2S4/rGO electrode materials were successfully prepared, respectively. Owing to its excellent micromixing performance, the MISR-prepared NiCo2S4/rGO composites had a smaller size and less agglomeration than the same composites prepared in a traditional stirred reactor (STR). The specific capacity of the MISR-prepared composites was as high as 198.0 mAh g−1 under the current density of 1 A g−1. The cycling stability of the composites also improved significantly after being modified with reduced graphene oxide (rGO), and they displayed a fine cycling stability, which maintained a retention rate of 83.6% after 1000 cycles of charging and discharging. Full article
(This article belongs to the Special Issue Process Intensification via Rotating Packed Bed (Higee))
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12 pages, 2261 KiB  
Article
Polymerization of Isobutylene in a Rotating Packed Bed Reactor: Experimental and Modeling Studies
by Wenhui Hou, Wei Wang, Yang Xiang, Yingjiao Li, Guangwen Chu, Haikui Zou and Baochang Sun
Appl. Sci. 2021, 11(21), 10194; https://0-doi-org.brum.beds.ac.uk/10.3390/app112110194 - 30 Oct 2021
Cited by 1 | Viewed by 1606
Abstract
Polymerization of isobutylene (IB) for synthesizing highly reactive polyisobutylene (HRPIB) is characterized by a complicated fast intrinsic reaction rate; therefore, the features of its products exhibit a strong dependence on mixing efficiency. To provide uniform and efficient mixing, a rotating packed bed was [...] Read more.
Polymerization of isobutylene (IB) for synthesizing highly reactive polyisobutylene (HRPIB) is characterized by a complicated fast intrinsic reaction rate; therefore, the features of its products exhibit a strong dependence on mixing efficiency. To provide uniform and efficient mixing, a rotating packed bed was employed as a reactor for polymerization of IB. The effects of operating parameters including polymerization temperature (T), rotating speed (N) and relative dosage of monomers and initiating systems ([M]0/[I]0) on number-average molecular weight (Mn) of HRPIB were studied. HRPIB with Mn of 2550 g·mol−1 and exo-olefin terminal content of 85 mol% were efficiently obtained at suitable conditions as T of 283 K, N of 1600 rpm and [M]0/[I]0 of 49. Moreover, the Mn can be regulated by changing T, N and [M]0/[I]0. Based on the presumptive-steady-state analysis method and the coalescence–redispersion model, a model for prediction of the Mn was developed and validated, and the calculated Mn values agreed well with experimental results, with a deviation of ±10%. The results demonstrate that RPB is a promising reactor for synthesizing HRPIB, and the given model for Mn can be applied for the design of RPB and process optimization. Full article
(This article belongs to the Special Issue Process Intensification via Rotating Packed Bed (Higee))
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17 pages, 4055 KiB  
Article
CFD Simulation of Dry Pressure Drop in a Cross-Flow Rotating Packed Bed
by Chao Zhang, Weizhou Jiao, Youzhi Liu, Guisheng Qi, Zhiguo Yuan and Qiaoling Zhang
Appl. Sci. 2021, 11(21), 10099; https://0-doi-org.brum.beds.ac.uk/10.3390/app112110099 - 28 Oct 2021
Cited by 3 | Viewed by 1611
Abstract
The cross-flow rotating packed bed (RPB) has attracted wide attention in recent years because of its advantages of large gas capacity, low pressure drop and lack of flooding limitation. However, the complex structure of the packing makes it difficult to obtain the gas [...] Read more.
The cross-flow rotating packed bed (RPB) has attracted wide attention in recent years because of its advantages of large gas capacity, low pressure drop and lack of flooding limitation. However, the complex structure of the packing makes it difficult to obtain the gas flow characteristics in the cross-flow RPB by experiments. In this study, the dry pressure drop in the cross-flow RPB was investigated by computational fluid dynamics (CFD). The packing was modeled by the porous media model and the rotation of the packing was simulated by the sliding mesh model. The simulation results obtained by three turbulence models were compared with experimental results, and the RNG k-ε model was found to best describe the turbulence behaviors in the cross-flow RPB. Then, the effects of gas flow rate and rotating speed on dry pressure drop in different parts of the cross-flow RPB were analyzed. The results of this study can provide important insights into the design and scale-up of cross-flow RPB. Full article
(This article belongs to the Special Issue Process Intensification via Rotating Packed Bed (Higee))
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