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Photon-absorption-based explanation of ultrasonic-assisted solar photochemical splitting of water to improve hydrogen production
- Source :
- International Journal of Hydrogen Energy. 43:14439-14450
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- The ultrasonic-assisted solar photochemical splitting of water had been explored in recent years to enhance hydrogen production efficiency. In this study, a photon-absorption-based study was conducted to investigate the mechanism of the ultrasonic-assisted solar photochemical splitting of water. An elaborate test bench for temperature-controlled, ultrasonic-assisted solar photochemical water splitting was designed, set up, and tested. A comparison of the hydrogen production between the ultrasonic-assisted and conventional solar photochemical splitting of water was carried out. The effective nanoparticle size before and after ultrasonic vibration, as well as after solar photocatalysis, was analyzed. Furthermore, the spectral absorptivity of the nanofluids before and after ultrasonic vibration, as well as after solar photocatalysis, was investigated by both experimental and numerical methods. The investigation indicated that the improved particle dispersion in the solution prepared by ultrasonication allowed the absorbance of more incoming sunlight. The amount of hydrogen produced by the ultrasonic-assisted hydrogen production was 3.45 times that of conventional solar photochemical splitting of water without pre-ultrasonicated. Besides, an effective spectral absorptivity coefficient was proposed as a modified measure of spectral absorptivity. In addition, the optimal particle diameter was optimized using the Monte Carlo ray tracing method to identify the best light absorption performance.
- Subjects :
- Materials science
Hydrogen
Renewable Energy, Sustainability and the Environment
020209 energy
Energy Engineering and Power Technology
chemistry.chemical_element
02 engineering and technology
Molar absorptivity
021001 nanoscience & nanotechnology
Condensed Matter Physics
Photochemistry
Absorbance
Fuel Technology
Nanofluid
chemistry
Physics::Space Physics
0202 electrical engineering, electronic engineering, information engineering
Water splitting
Astrophysics::Earth and Planetary Astrophysics
0210 nano-technology
Absorption (electromagnetic radiation)
Distributed ray tracing
Hydrogen production
Subjects
Details
- ISSN :
- 03603199
- Volume :
- 43
- Database :
- OpenAIRE
- Journal :
- International Journal of Hydrogen Energy
- Accession number :
- edsair.doi...........ab627a2491e987a304ff9357f9243338