Use of high intensity gas-liquid mixers as reactors

Zhu, Zhangming; Hannon, Joe; Green, A

doi:10.1016/0009-2509(92)87140-l

Cited by 21 publications

(9 citation statements)

References 15 publications

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“…Pressure drop DP allows the quantification of the dissipated power, thus it has to be lowered for the process to be economically competitive. This parameter depends on superficial liquid and gas velocities, fluid nature (Zhu et al, 1992) and internal geometry.…”

Section: Energy Consumptionmentioning

confidence: 99%

New compact scrubber for odour removal in wastewater treatment plants

Sánchez

Couvert

Laplanche

et al. 2006

Water Science and Technology

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This work presents the performances of a new odour scrubber. The reactor is packed with a new structure which enables co-current operations at high gas velocities. Energy consumption and removal efficiency of sulphur compounds by oxidative alkaline scrubbing were studied. The influence of both superficial gas (U(SG)) and liquid (U(SL)) velocities, ranging from 5.6 to 28 m.s(-1) and 0.016 to 0.055 m.s(-1) respectively, were quantified. Thus, the range of 0.5 to 5 liquid-to-gas mass ratio (L/G) was studied. A comparison has been made with a previous study on static mixers (SM) and with classical random packed towers (PT). It has been shown that superficial liquid and gas velocities have a significant influence on these parameters. Hydrogen sulphide (H2S) abatement reached values up to 99%. As concerns methylmercaptan (CH3SH), the maximal removal efficiency was 87%. As a result, if well scaled-up, our reactor can be a small single stage efficient apparatus for the elimination of low concentrations of sulphur compounds as H2S and CH3SH in high flow rates of polluted gas effluents.

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Section: Energy Consumptionmentioning

confidence: 99%

New compact scrubber for odour removal in wastewater treatment plants

Sánchez

Couvert

Laplanche

et al. 2006

Water Science and Technology

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“…Compared to classic mixing or mass transfer processes, they can be used at large gas and liquid flow rates, for fluids of high viscosity, and they do not need much maintenance. Zhu et al (1992) wrote that SM enables the increase of reaction velocities and selectivity. As a consequence, SMs are largely used in industry: liquids or gas homogenisation, dispersion or emulsion with or without reaction in a gas-liquid system, but also heat and mass transfer operations like H 2 S selective absorption in petroleum chemistry (Germain and Wetter, 1982).…”

Section: Introductionmentioning

confidence: 99%

Static mixers with a gas continuous phase

Couvert

Sánchez

Charron

et al. 2006

Chemical Engineering Science

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“…19 It has been reported that the mass transfer coefficient in high intensity gas-liquid mixers is two orders of magnitude higher than in conventional contactors. 20 Pressure drop, gas holdup, interfacial area and mass transfer coefficients are the important design variables for any such types of gas-liquid contacting equipments. While these parameters have been extensively analyzed and reported for various types of equipment configurations, 21 adequate data is not available for liquid jet gas ejectors.…”

Section: Introductionmentioning

confidence: 99%

Gas holdup and energy dissipation in liquid‐gas ejectors

Appusamy

Regupathi

Murugesan

2008

J of Chemical Tech & Biotech

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BACKGROUND: Ejectors have excellent mass transfer characteristics with energy efficiency and can be used in place of conventional countercurrent systems, namely, packed bed contactors as well as venturi scrubbers, cyclones and airlift pumps. Although a number of papers have been published in the recent past, none of them provides a theoretical basis for the prediction of gas phase holdup. In this work an attempt has been made to develop a theoretical basis for predicting gas phase holdup based on first principles using Nguyen and Spedding's distribution function (C o ) and initial value parameter (B).

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Use of high intensity gas-liquid mixers as reactors

Cited by 21 publications

References 15 publications

New compact scrubber for odour removal in wastewater treatment plants

New compact scrubber for odour removal in wastewater treatment plants

Static mixers with a gas continuous phase

Gas holdup and energy dissipation in liquid‐gas ejectors

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