BiPO4/Bi2S3-HKUST-1-MOF as a novel blue light-driven photocatalyst for simultaneous degradation of toluidine blue and auramine-O dyes in a new rotating packed bed reactor: optimization and comparison to a conventional reactor

RSC Advances ◽  
2016 ◽  
Vol 6 (68) ◽  
pp. 63667-63680 ◽  
Author(s):  
S. Mosleh ◽  
M. R. Rahimi ◽  
M. Ghaedi ◽  
K. Dashtian ◽  
S. Hajati
Keyword(s):  
Blue Light ◽  
Toluidine Blue ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
X Ray ◽  
Reactor Optimization ◽  
Rotating Packed Bed ◽  
Auramine O ◽  
Simultaneous Degradation

BiPO4/Bi2S3-HKUST-1-MOF as a novel blue light active photocatalyst was synthesized and characterized by X-ray XRD, SEM, PL, BET, BJH and DRS.

Rotating packed bed reactor for enzymatic synthesis of biodiesel

2017 ◽  
Vol 224 ◽  
pp. 292-297 ◽  
Author(s):  
Juntao Xu ◽  
Changsheng Liu ◽  
Meng Wang ◽  
Lei Shao ◽  
Li Deng ◽  
...  
Keyword(s):  
Enzymatic Synthesis ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Rotating Packed Bed

Synthesis of nano-fibers of aluminum hydroxide in novel rotating packed bed reactor

2003 ◽  
Vol 58 (3-6) ◽  
pp. 569-575 ◽  
Author(s):  
Jian-Feng Chen ◽  
Lei Shao ◽  
Fen Guo ◽  
Xing-Ming Wang
Keyword(s):  
Aluminum Hydroxide ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Rotating Packed Bed

scholarly journals Polymerization of Isobutylene in a Rotating Packed Bed Reactor: Experimental and Modeling Studies

2021 ◽  
Vol 11 (21) ◽  
pp. 10194
Author(s):  
Wenhui Hou ◽  
Wei Wang ◽  
Yang Xiang ◽  
Yingjiao Li ◽  
Guangwen Chu ◽  
...  
Keyword(s):  
Strong Dependence ◽  
Average Molecular Weight ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Mixing Efficiency ◽  
Polymerization Temperature ◽  
Analysis Method ◽  
Rotating Speed ◽  
Rotating Packed Bed ◽  
The Given

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.

scholarly journals Preparation of TiO2 and Fe-TiO2 with an Impinging Stream-Rotating Packed Bed by the Precipitation Method for the Photodegradation of Gaseous Toluene

Nanomaterials ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 1173 ◽  
Author(s):  
Guangping Zeng ◽  
Qiaoling Zhang ◽  
Youzhi Liu ◽  
Shaochuang Zhang ◽  
Jing Guo
Keyword(s):  
Electron Microscopy ◽  
Particle Size ◽  
Packed Bed ◽  
Pure Tio2 ◽  
Precipitation Method ◽  
Nano Tio2 ◽  
X Ray ◽  
Rotating Packed Bed ◽  
Bet Analysis ◽  
Gaseous Toluene

Nano-TiO2 has always been one of the most important topics in the research of photocatalysts due to its special activity and stability. However, it has always been difficult to obtain nano-TiO2 with high dispersion, a small particle size and high photocatalytic activity. In this paper, nano-TiO2 powder was prepared by combining the high-gravity technique and direct precipitation method in an impinging stream-rotating packed bed (IS-RPB) reactor followed by Fe3+ in-situ doping. TiOSO4 and NH3·H2O solutions were cut into very small liquid microelements by high-speed rotating packing, and the mass transfer and microscopic mixing of the nucleation and growth processes of nano-TiO2 were strengthened in IS-RPB, which was beneficial to the continuous production of high quality nano-TiO2. Pure TiO2 and iron-doped nano-TiO2 (Fe-TiO2) were obtained in IS-RPB and were investigated by means of X-ray diffraction (XRD), Raman, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS) and Brunauer–Emmett–Teller (BET) analysis, which found that pure TiO2 had a particle size of about 12.5 nm, good dispersibility and a complete anatase crystal at the rotating speed of packing of 800 rpm and calcination temperature of 500 °C. The addition of Fe3+ did not change the crystalline structure of TiO2. Iron was highly dispersed in TiO2 without the detection of aggregates and was found to exist in a positive trivalent form by XPS. With the increase of iron doping, the photoresponse range of TiO2 to visible light was broadened from 3.06 eV to 2.26 eV. The degradation efficiency of gaseous toluene by Fe-TiO2 under ultraviolet light was higher than that of pure TiO2 and commercial P25 due to Fe3+ effectively suppressing the recombination of TiO2 electrons and holes; the highest efficiency produced by 1.0% Fe-TiO2 was 95.7%.

Ultrafast Synthesis of Silver Nanoparticle Decorated Graphene Oxide by a Rotating Packed Bed Reactor

2016 ◽  
Vol 55 (44) ◽  
pp. 11622-11630 ◽  
Author(s):  
Xing-Wei Han ◽  
Xiang-Zhen Meng ◽  
Jie Zhang ◽  
Jie-Xin Wang ◽  
Hai-Feng Huang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Silver Nanoparticle ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Rotating Packed Bed

Cationic polymerization in rotating packed bed reactor: Experimental and modeling

AIChE Journal ◽  
2009 ◽  
pp. NA-NA ◽  
Author(s):  
Jian-Feng Chen ◽  
Hua Gao ◽  
Hai-Kui Zou ◽  
Guang-Wen Chu ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Cationic Polymerization ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Rotating Packed Bed

scholarly journals Synthesis of Silver Sulfide Quantum Dots Via the Liquid–Liquid Interface Reaction in a Rotating Packed Bed Reactor

2019 ◽  
Vol 26 (4) ◽  
pp. 273-282 ◽  
Author(s):  
Qing Liu ◽  
Yuan Pu ◽  
Zhijian Zhao ◽  
Jiexin Wang ◽  
Dan Wang
Keyword(s):  
Quantum Dots ◽  
Scale Up ◽  
Interface Reaction ◽  
Packed Bed ◽  
Silver Sulfide ◽  
Liquid Interface ◽  
Packed Bed Reactor ◽  
Dynamics Simulation ◽  
Rotating Packed Bed ◽  
Nir Luminescence

AbstractWe developed the high-gravity coupled liquid–liquid interface reaction technique on the basis of the rotating packed bed (RPB) reactor for the continuous and ultrafast synthesis of silver sulfide (Ag2S) quantum dots (QDs) with near-infrared (NIR) luminescence. The formation of Ag2S QDs occurs at the interface of microdroplets, and the average size of Ag2S QDs was 4.5 nm with a narrow size distribution. Ag2S QDs can disperse well in various organic solvents and exhibit NIR luminescence with a peak wavelength at 1270 nm under 980-nm laser excitation. The mechanism of the process intensification was revealed by both the computational fluid dynamics simulation and fluorescence imaging, and the mechanism is attributed to the small and uniform droplet formation in the RPB reactor. This study provides a novel approach for the continuous and ultrafast synthesis of NIR Ag2S QDs for potential scale-up.

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