Characteristic studies of micron zinc particle hydrolysis in a fixed bed reactor

• Autorzy: Lv M. , Liu H. , Nie X. , Ashraf M. A.

Identyfikatory

DOI

10.1515/pomr-2015-0042

• Języki publikacji: EN

Abstrakty

EN

Zinc fuel is considered as a kind of promising energy sources for marine propeller. As one of the key steps for zinc marine energy power system, zinc hydrolysis process had been studied experimentally in a fixed bed reactor. In this study, we focus on the characteristics of micron zinc particle hydrolysis. The experimental results suggested that the steam inner diffusion is the controlling step of accumulative zinc particles hydrolysis reaction at a relative lower temperature and a relative higher water partial pressure. In other conditions, the chemical reaction kinetics was the controlling step. And two kinds of chemical reaction kinetics appeared in experiments: the surface reaction and the gas-gas reaction. The latter one occurs usually for larger zinc particles and high reaction temperature. Temperature seems to be one of the most important parameters for the dividing of different reaction mechanisms. Several parameters of the hydrolysis process including heating rate, water partial pressure, the particle size and temperature were also studied in this paper. Results show that the initial reaction temperature of zinc hydrolysis in fixed bed is about 410 oC. And the initial reaction temperature increases as the heating rate increases and as the water partial pressure decreases. The total hydrogen yield increases as the heating rate decreases, as the water partial pressure increases, as the zinc particle size decreases, and as the reaction temperature increases. A hydrogen yield of more than 81.5% was obtained in the fixed bed experiments.

Słowa kluczowe

EN

hydrogen; zinc hydrolysis; thermal chemistry; fixed bed

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2015
• Tom: S 1
• Strony: 112--120
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Lv M.

• School of Mechanical Engineering Hangzhou Dianzi University Hangzhou China

autor

Liu H.

• School of Mechanical Engineering Hangzhou Dianzi University Hangzhou China

autor

Nie X.

• School of Mechanical Engineering Hangzhou Dianzi University Hangzhou China

autor

Ashraf M. A.

• Department of Geology, Faculty of Science, University of Malaya 50603 Kuala Lumpur, Malaysia
• Faculty of Science & Natural Resources, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia

Bibliografia

• 1. Committee on Technology for Future Naval Forces, Commission on Physical Sciences, Mathematics, and Applications, National Research Council.: Technology for the United States Navy and Marine Corps, 2000-2035, Volumn 2, National academy press, Washington, D.C, 1997.
• 2. Steinfeld, A., Kuhn, P., Reller, A., Palumbo, R., Murray, J., Tamaura, Y.: Solar-processed metals as clean energy carriers and water-splitters. International Journal of Hydrogen Energy, 1998.
• 3. Weidenkaff, A., Reller, A.W., Wokaun, A., Steinfeld, A. : Thermogravimetric analysis of the ZnO/Zn water splitting cycle, Thermochimica Acta , 2000.
• 4. Lv, M., Zhou, J.H., Zhou, Z.J., Yang, W.J., Liu, J.Z., Cen, K.F. : A novel system of near zero emission clean coal energy utilization based on Zn/ ZnO. Journal of Power Engineering, 2008.
• 5. Ernst, F.O., Steinfeld, A., Pratsinis, S.E.: Hydrolysis rate of submicron Zn particles for solar H2 synthesis, International Journal of Hydrogen Energy,2009.
• 6. Berman, A., Epstein, M.: The kinetics of hydrogen production in the oxidation of liquid zinc with water vapor. International Journal of Hydrogen Energy, 2000.
• 7. Wegner, K., Ly, H.C., Weiss, R.J., Pratsinis, S.E., Steinfeld, A.: In situ formation and hydrolysis of Zn nanoparticles for H2 production by the 2-step ZnO/Zn water-splitting thermochemical cycle. International Journal of Hydrogen Energy, 2006.
• 8. Melchior, T., Piatkowski, N., Steinfeld, A.: H2 production by steam-quenching of Zn vapor in a hot-wall aerosol flow reactor, Chemical Engineering Science , 2009.
• 9. Vishnevetsky, I., Epstein, M.: Production of hydrogen from solar zinc in steam atmosphere, International Journal of Hydrogen Energy, 2007.
• 10. Lv, M., Zhou, J.H., Yang, W.J., Cen, K.F.: Thermogravimetric analysis of the hydrolysis of zinc particles, International Journal of Hydrogen energy, 2010.
• 11. Ma, X., Zachariah, M.R.: Size-resolved kinetics of Zn nanocrystal hydrolysis for hydrogen generation. International Journal of Hydrogen Energy, 2010.
• 12. Bhaduria, B., Verma, N.: A zinc nanoparticles-dispersed multi-scale web of carbonmicro-nanofibers for hydrogen production step of ZnO/Znwater splitting thermochemical cycle, Chemical Engineering Research and Design,2014.
• 1. Committee on Technology for Future Naval Forces, Commission on Physical Sciences, Mathematics, and Applications, National Research Council.: Technology for the United States Navy and Marine Corps, 2000-2035, Volumn 2, National academy press, Washington, D.C, 1997.
• 2. Steinfeld, A., Kuhn, P., Reller, A., Palumbo, R., Murray, J., Tamaura, Y.: Solar-processed metals as clean energy carriers and water-splitters. International Journal of Hydrogen Energy, 1998.
• 3. Weidenkaff, A., Reller, A.W., Wokaun, A., Steinfeld, A. : Thermogravimetric analysis of the ZnO/Zn water splitting cycle, Thermochimica Acta , 2000.
• 4. Lv, M., Zhou, J.H., Zhou, Z.J., Yang, W.J., Liu, J.Z., Cen, K.F. : A novel system of near zero emission clean coal energy utilization based on Zn/ ZnO. Journal of Power Engineering, 2008.
• 5. Ernst, F.O., Steinfeld, A., Pratsinis, S.E.: Hydrolysis rate of submicron Zn particles for solar H2 synthesis, International Journal of Hydrogen Energy,2009.
• 6. Berman, A., Epstein, M.: The kinetics of hydrogen production in the oxidation of liquid zinc with water vapor. International Journal of Hydrogen Energy, 2000.
• 7. Wegner, K., Ly, H.C., Weiss, R.J., Pratsinis, S.E., Steinfeld, A.: In situ formation and hydrolysis of Zn nanoparticles for H2 production by the 2-step ZnO/Zn water-splitting thermochemical cycle. International Journal of Hydrogen Energy, 2006.
• 8. Melchior, T., Piatkowski, N., Steinfeld, A.: H2 production by steam-quenching of Zn vapor in a hot-wall aerosol flow reactor, Chemical Engineering Science , 2009.
• 9. Vishnevetsky, I., Epstein, M.: Production of hydrogen from solar zinc in steam atmosphere, International Journal of Hydrogen Energy, 2007.
• 10. Lv, M., Zhou, J.H., Yang, W.J., Cen, K.F.: Thermogravimetric analysis of the hydrolysis of zinc particles, International Journal of Hydrogen energy, 2010.
• 11. Ma, X., Zachariah, M.R.: Size-resolved kinetics of Zn nanocrystal hydrolysis for hydrogen generation. International Journal of Hydrogen Energy, 2010.
• 12. Bhaduria, B., Verma, N.: A zinc nanoparticles-dispersed multi-scale web of carbonmicro-nanofibers for hydrogen production step of ZnO/Znwater splitting thermochemical cycle, Chemical Engineering Research and Design,2014.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.