Chemistry driven by suction

Zhilin Wu, Bernd Ondruschka, Yongchun Zhang, David H. Bremner, Haifeng Shen, Marcus Franke

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The use of suction rather than positive pressure hydrodynamic cavitation is suggested as an energy efficient green technology. The restriction orifice for creating hydrodynamic cavitation is fixed on the suction side of the pump, and the upstream and downstream pressures are kept low, at atmospheric pressure and partial vacuum, respectively. Energy efficiency is much better by suction than by extrusion with the same pump. As an indicator of cavitational intensity, the conductivity of the aqueous solution increases linearly with the decomposition of chloroform driven by suction. The concentration of Cl- was found to synchronously rise with the increase of conductivity. The observed rates vary polynomially with the suction pressure and the solution temperature. Suction also facilitates the two-phase mixing, and promotes the ozonation of phenol, due to high-speed jetting of liquid along with the associated shock waves induced by collapsing cavitation. These results indicate that hydrodynamic cavitation induced by suction as a green tool is particularly promising especially for heterogeneous reactions, such as biodiesel synthesis, oxidation of organics, extraction and emulsification.
Original languageEnglish
Pages (from-to)1026-1030
Number of pages5
JournalGreen Chemistry
Volume11
Issue number7
DOIs
Publication statusPublished - 2009

Fingerprint

suction
chemistry
cavitation flow
hydrodynamics
pumps
conductivity
orifices
chloroform
phenols
upstream
shock waves
constrictions
atmospheric pressure
high speed
aqueous solutions
decomposition
vacuum
oxidation
energy
synthesis

Cite this

Wu, Z., Ondruschka, B., Zhang, Y., Bremner, D. H., Shen, H., & Franke, M. (2009). Chemistry driven by suction. Green Chemistry, 11(7), 1026-1030. https://doi.org/10.1039/b902224d
Wu, Zhilin ; Ondruschka, Bernd ; Zhang, Yongchun ; Bremner, David H. ; Shen, Haifeng ; Franke, Marcus. / Chemistry driven by suction. In: Green Chemistry. 2009 ; Vol. 11, No. 7. pp. 1026-1030.
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Wu, Z, Ondruschka, B, Zhang, Y, Bremner, DH, Shen, H & Franke, M 2009, 'Chemistry driven by suction', Green Chemistry, vol. 11, no. 7, pp. 1026-1030. https://doi.org/10.1039/b902224d

Chemistry driven by suction. / Wu, Zhilin; Ondruschka, Bernd; Zhang, Yongchun; Bremner, David H.; Shen, Haifeng; Franke, Marcus.

In: Green Chemistry, Vol. 11, No. 7, 2009, p. 1026-1030.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Chemistry driven by suction

AU - Wu, Zhilin

AU - Ondruschka, Bernd

AU - Zhang, Yongchun

AU - Bremner, David H.

AU - Shen, Haifeng

AU - Franke, Marcus

PY - 2009

Y1 - 2009

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AB - The use of suction rather than positive pressure hydrodynamic cavitation is suggested as an energy efficient green technology. The restriction orifice for creating hydrodynamic cavitation is fixed on the suction side of the pump, and the upstream and downstream pressures are kept low, at atmospheric pressure and partial vacuum, respectively. Energy efficiency is much better by suction than by extrusion with the same pump. As an indicator of cavitational intensity, the conductivity of the aqueous solution increases linearly with the decomposition of chloroform driven by suction. The concentration of Cl- was found to synchronously rise with the increase of conductivity. The observed rates vary polynomially with the suction pressure and the solution temperature. Suction also facilitates the two-phase mixing, and promotes the ozonation of phenol, due to high-speed jetting of liquid along with the associated shock waves induced by collapsing cavitation. These results indicate that hydrodynamic cavitation induced by suction as a green tool is particularly promising especially for heterogeneous reactions, such as biodiesel synthesis, oxidation of organics, extraction and emulsification.

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DO - 10.1039/b902224d

M3 - Article

VL - 11

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Wu Z, Ondruschka B, Zhang Y, Bremner DH, Shen H, Franke M. Chemistry driven by suction. Green Chemistry. 2009;11(7):1026-1030. https://doi.org/10.1039/b902224d