Impinging Stream Reactors: Fundamentals and Applications

Tamir, Abraham

doi:10.1080/07373939508916970

Cited by 49 publications

(62 citation statements)

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“…In GIS heat and mass transfer are efficiently enhanced mainly by the following [2][3][4][5]7]: (1) very high relative velocity between phases, especially around the impingement plane; (2) oscillation movement of particles or droplets penetrating to and fro between the opposing streams; (3) very strong turbulence in the impingement zone. Also, in the case of dispersed phase being a liquid, surface renewing promoted by the impingement may lead to additional enhancement of transfer.…”

Section: Major Features Of Gas-continuous Impinging Streamsmentioning

confidence: 99%

“…Because of its well properties and application potential, wide investigations on IS were made in the former Soviet Union, Israel [2], China, and some other countries since 1960s; the concept of IS was also extended, including the extension of phase conditions, that is, the continuous phase in IS can also be a liquid. Results of number investigations have illustrated that the properties and performances of IS with a liquid as the continuous phases are quite different from those with a gas as the continuous phase [3].…”

Section: Introductionmentioning

confidence: 99%

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Features of Impinging Streams Intensifying Processes and Their Applications

Zhou

Guo

et al. 2010

International Journal of Chemical Engineering

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Impinging streams (IS) are classified into gas-continuous and liquid-continuous ones (GIS and LIS). Large number of experimental data has shown GIS promotes transfer very efficiently; while it has the intrinsic faultiness of very short residence time, and its flow configuration is relatively complex, resulting in difficulty in arranging multistage process. Essentially, GIS is applicable only for rapid processes controlled by gas film diffusion. The effect of LIS enhancing transfer is negligible; while it has the features of efficient micromixing and strong pressure fluctuation both which are resulted from the intensive interaction between the opposing streams and can promote process kinetics. All the features of IS, including GIS and LIS, have great potential of application. Reviewing the results of number investigations, mostly worked by the authors, a somewhat detailed introduction to the features of IS and several cases of its successful applications, such as wet FGD, preparation of ultrafine or nano powders, successful industrial application of large scale LIS reactors and crystallizers, etc, are described.

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Section: Major Features Of Gas-continuous Impinging Streamsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Features of Impinging Streams Intensifying Processes and Their Applications

Zhou

Guo

et al. 2010

International Journal of Chemical Engineering

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“…Research carried out by Elperin (1961) and Tamir and Huang (1995) showed that the phase transfer coefficient greatly improved the transfer of chemical processes in the impinging stream mixer. Impinging stream technology has been proven to facilitate micro-mixing and strengthen transfer between phases (Tamir and Huang, 1995;Mahajan and Kirwan, 1996).…”

Section: Introductionmentioning

confidence: 99%

“…Impinging stream technology has been proven to facilitate micro-mixing and strengthen transfer between phases (Tamir and Huang, 1995;Mahajan and Kirwan, 1996). The impinging stream reactor, a new and efficient reactor, or mixer, used in the chemical industry, has offered advantages for chemical reaction (Gao et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Chaotic Analysis Based on Velocity Measurement in Nozzle Opposed Impinging Stream Mixer

Zhang

Dong

et al. 2018

J. Chem. Eng. Japan / JCEJ

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The velocity eld in an opposed jet mixer was studied by using Phase Doppler Anemometry (PDA). In this study, the effect of operating conditions such as nozzle separations and inner nozzle diameters was investigated to study the changes in characteristic chaotic parameters (correlation dimension, Kolmogorov entropy, and largest Lyapunov exponent). The velocity eld possessed chaotic characteristics, in which the value of the correlation dimension ranged from 2.34 to 7.52. The characteristic chaotic parameters increased and then decreased as the nozzle distance increased. This re ected the micro-mixing e ciency of the mixer. The e ciency of the mixer improved as the values of the chaotic characteristic parameters increased. Thus, the optimal conditions of microcosmic mixture were obtained. Therefore, a suitable nozzle distance, or decreasing nozzle diameter, is advantageous for the improvement of a mixer's micro-mixing e ciency.

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“…Impinging streams systems, first proposed by Elperin [2], have been applied as some suitable devices for enhancing mass and heat transfer processes in flowing gas-liquid, gas-solid and liquid-liquid emulsions. In such apparatus, two droplet-laden gaseous jets flowing in opposite directions are allowed to impinge.…”

Section: Introductionmentioning

confidence: 99%

Simulation of flow and modelling the residence time distribution in a continuous two impinging liquid-liquid streams reactor using the Monte Carlo Technique

Sohrabi¹,

Rajaie²

2009

Computational Methods in Multiphase Flow V

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In the present study, a stochastic model for the residence time distribution (RTD) in a coaxial counter current liquid-liquid impinging streams system has been developed. Simulations of droplets movements in the impinging spray systems determine the residence time distribution. Droplets dynamics has been formulated from the Boltzmann equation using direct simulation Monte Carlo (DSMC) method. The data predicted from the model has been correlated with the experimental results obtained from a coaxial counter current two impinging liquid-liquid steams apparatus. The reactor consisted of a cylindrical vessel made of Pyrex glass, length 60 cm and internal diameter 14 cm. The apparatus was equipped with two circular plates placed at the two ends of the reactor. Thus the length of the contact compartment could be varied by moving the plates away from or towards each other. Water and toluene were used as two immiscible liquid streams. These were sprayed into the reactor by applying pressurized nitrogen via special ducts, placed behind the feed nozzles. The degree of agreement between the experimental results and those predicted from the model was 85%.

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Impinging Stream Reactors: Fundamentals and Applications

Cited by 49 publications

References 0 publications

Features of Impinging Streams Intensifying Processes and Their Applications

Features of Impinging Streams Intensifying Processes and Their Applications

Chaotic Analysis Based on Velocity Measurement in Nozzle Opposed Impinging Stream Mixer

Simulation of flow and modelling the residence time distribution in a continuous two impinging liquid-liquid streams reactor using the Monte Carlo Technique

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