Abstract
In this work, samples of metallic aluminum are objects of sub- and supercritical water oxidation. Experimental studies have been carried out, and dependences of the effect of temperature, pressure, reaction time, and pH of the oxidizing agent on the phase composition of the oxidation products and their adsorption properties have been revealed. Experimental studies have been carried out in the temperature range of 275–380°C, reaction time from 3 to 12 h, and different water pH of 7–12. Maximum specific surface S = 120.2 m2/g samples obtained at temperature T = 380°C and reaction time τ = 3 h with pH 12. The phase composition of this sample included aluminum oxide γ-Al2O3 (92.3 wt %) and corundum α-Al2O3 (7.7 wt %).
Notes
Powder diffraction data powder diffraction file.
REFERENCES
Ivanova, A.S. and Mel’gunov, M.S., Promyshl. Katal. Lektsiyakh, 2009, no. 8, p. 7.
Vostrikov, A.A., Fedyaeva, O.N., Fadeeva, I.I., and Sokol, M.Ya., Sverkhkrit. Fluidy: Teor. Prakt., 2010, vol. 5, no. 1, p. 12.
Vlaskin, M.S., Grigorenko, A.V., Zhuk, A.Z., Lisitsyn, A.V., Sheindlin, A.E., and Shkol’nikov, E.I., High Temp., 2016, vol. 54, no. 3, p. 322.
Shkolnikov, E.I., Shaitura, N.S., and Vlaskin, M.S., J. Supercrit. Fluids, 2013, vol. 73, p. 10.
Vostrikov, A.A., Shishkin, A.V., and Fedyaeva, O.N., Int. J. Hydrogen Energy, 2020, vol. 45, no. 1, p. 1061.
Veriansyah, B., Susanti, R.F., Nugroho, A., Min, B.K., and Kim, J., Mater. Lett., 2011, vol. 65, no. 4, p. 772.
Karimov, T.M., Mukhammadiev, A.D., Gil’mutdinov, I.I., Gil’mutdinov, I.M., Kuznetsova, I.V., and Sabirzyanov, A.N., Mater. 9-i Ross. stud. nauch.-tekhn. konf. “Vakuumnaya tekhnika i tekhnologiya” (Proc. 9th Russ. Student Conf. on Vacuum Technique and Technology), Kazan: Kazan. Nats. Issled. Tekhnol. Univ., 2019, p. 170.
Funding
The work was performed within the framework of the state order “Catalysis in Oil Refining and Petrochemicals” (agreement no. 075-00315-20-01 dated April 6, 2020) using the analytical equipment of the Center for Collective Use “Nanomaterials and Nanotechnologies.”
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
The authors declare that they have no conflicts of interest.
Rights and permissions
About this article
Cite this article
Gilmutdinov, I.I., Sandugei, N.S., Gilmutdinov, I.M. et al. An Experimental Study of Phase Transformations of Aluminum Oxides in the Processes of Sub- and Supercritical Water Oxidation of Metallic Aluminum. High Temp 60, 177–181 (2022). https://doi.org/10.1134/S0018151X22020183
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0018151X22020183