Arabian Journal for Science and Engineering

, Volume 43, Issue 11, pp 6109–6117 | Cite as

Correlations Between the Sonochemical Production Rate of Hydrogen and the Maximum Temperature and Pressure Reached in Acoustic Bubbles

  • Slimane MerouaniEmail author
  • Oualid Hamdaoui
Research Article - Chemical Engineering


Water sonolysis generates hydrogen through acoustic cavitation. In this work, based on a model for a reactive acoustic bubble, correlations between the sonochemical production of hydrogen and the maximum temperature and pressure reached in the bubble at the violent collapse have been made. The computational analysis has been performed for more than 800 points obtained by combining various cavitation parameters, i.e., frequency, acoustic intensity, liquid temperature, and ambient bubble radius. The simulation results showed that hydrogen production rate progressed linearly with the bubble temperature and pressure rise up to plateaus, which begin at 3500 ± 200 K and 100 ± 10 atm. Analyzing the progress of \(\text {H}^{{\cdot }}\) and \(^{{\cdot }} \)OH (\(\text {H}_{2}\) precursors) as function of bubble temperature and pressure showed very similar evolutions as those obtained for \(\text {H}_{2}\) with the same optimums at 3500 ± 200 K and 100 ± 10 atm. Consequently, in addition to the quench of hydrogen formation at very high bubble temperatures through the reaction \(\text {H}_{2}+\,^{{\cdot }}{\hbox {OH}}\rightarrow \text {H}_{2}\hbox {O}+\text {H}^{{\cdot }}\), the existing optimum temperature and pressure for \(\text {H}_{2}\) production may also be due the hard consumption of their precursors (\(^{{\cdot }}\)OH and \(\text {H}^{{\cdot }})\) above 3500 K and 100 atm.


Water sonolysis Hydrogen production Cavitation bubble Bubble temperature Bubble pressure 


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Copyright information

© King Fahd University of Petroleum & Minerals 2018

Authors and Affiliations

  1. 1.Laboratory of Environmental Process Engineering, Department of Chemical Engineering, Faculty of Process EngineeringUniversity of Constantine 3ConstantineAlgeria
  2. 2.Laboratory of Environmental Engineering, Department of Process Engineering, Faculty of EngineeringBadji Mokhtar – Annaba UniversityAnnabaAlgeria

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