Skip to content
BY-NC-ND 3.0 license Open Access Published by De Gruyter Open Access September 21, 2012

Catalytic reduction of sulfuric acid to sulfur dioxide

  • Ancuţa Balla EMAIL logo , Cristina Marcu , Damian Axente , Gheorghe Borodi and Diana Lazăr
From the journal Open Chemistry


The reduction of H2SO4 to SO2 occurs with a relatively good efficiency only at high temperatures, in the presence of catalysts. Some experimental results, regarding conversion of sulfuric acid (96 wt.%) to sulfur dioxide and oxygen, are reported. The reduction has been performed at 800 – 900°C and atmospheric pressure, in a tubular quartz reactor. The following commercial catalysts were tested: Pd/Al2O3 (5 wt.% and 0.5 wt.% Pd), Pt/Al2O3 (0.1 wt.% Pt) and α-Fe2O3. The fresh and spent catalysts were characterized by X-Ray diffraction and BET method. The highest catalytic activity was determined for 5 wt.% Pd/Al2O3, a conversion of 80% being obtained for 5 hours time on stream, at 9 mL h−1 flow rate of 96 wt.% H2SO4. A conversion of 64% was determined for 0.5 wt.% Pd/Al2O3 and 0.1 wt.% Pt/Al2O3. For α-Fe2O3, a less expensive catalyst, a conversion of 61% for about 60 hours was obtained.

[1] S. Brutti, L. Bencivenni, V. Barbarossa, S. Sau, G. De Maria, J. Chem. Thermodynamics 38, 1292 (2006) in Google Scholar

[2] D. Schwartz, R. Gadiou, J.F. Brilhac, G. Prado, G. Martinez, Ind. Eng. Chem. Res. 39, 2183 (2000) in Google Scholar

[3] L.E. Brecher, S. Spewock, C.J. Warde, Int. J. Hydrogen Energy 2, 7 (1977) in Google Scholar

[4] G.H. Farbman, Int. J. Hydrogen Energy 4, 111 (1979) in Google Scholar

[5] G.E. Beghi, Int. J. Hydrogen Energy 11, 761 (1986) in Google Scholar

[6] J.H. Norman, G.E. Besenbruch, L.C. Brown, D.R. O’Keefe, C.L. Allen, General Atomics Report GA-A16713, DOE Report DOE/ET/26225-1, May 1982. Available on-line at Search in Google Scholar

[7] R. Buckingham, B. Russ, L. Brown, G.E. Besenbruch, General Atomics Annual Report, November 2004. Available on-line at Search in Google Scholar

[8] J.F. Pierre, R.L. Ammon, in: Proceedings of the 4th World Hydrogen Energy Conference 2, 703 (1982) Search in Google Scholar

[9] M. Dokiya, T. Kameyama, K. Fukuda, Y. Kotera, Bull. Chem. Soc. Jap. 50, 2657 (1977) in Google Scholar

[10] J.H. Norman, K.J. Mysels, R. Sharp, D. Williamson, Int. J. Hydrogen Energy 7, 545 (1982) in Google Scholar

[11] L.N. Yannopoulos, J.F. Pierre, Int. J. Hydrogen Energy 9, 383 (1984) in Google Scholar

[12] G. Karagiannakis, C.C. Agrafiotis, A. Zygogianni, C. Pagkoura, A.G. Konstandopoulos, Int. J. Hydrogen Energy 36, 2831 (2011) in Google Scholar

[13] A. Giaconia, S. Sau, C. Felici, P. Tarquini, G. Karagiannakis, C. Pagkoura, C. Agrafiotis, A.G. Konstandopoulos, D. Thomey, L. de Oliveira, M. Roeb, C. Sattler, Int. J. Hydrogen Energy 36, 6496 (2011) in Google Scholar

[14] D.M. Ginosar, L.M. Petkovic, A.W. Glenn, K.C. Burch, Int. J. Hydrogen Energy 32, 482 (2007) in Google Scholar

[15] L.M. Petkovic, D.M. Ginosar, H.W. Rollins, K.C. Burch, P.J. Pinhero, H.H. Farell, Applied Catalysis A: General 338, 27 (2008) in Google Scholar

[16] T.H. Kim, G.T. Gong, B.G. Lee, K.Y. Lee, H.Y. Jeon, C.H. Shin, H. Kim, K.D. Jung, Applied Catalysis A: General 305, 39 (2006) in Google Scholar

[17] A.M. Banerjee, M.R. Pai, K. Bhattacharya, A.K. Tripathi, V.S. Kamble, S.R. Bharadwaj, S.K. Kulshreshtha, Int. J. Hydrogen Energy 33, 319 (2008) in Google Scholar

[18] B.M. Nagaraja, K.D. Jung, K.S. Yoo, Catal. Lett. 128, 248 (2009) in Google Scholar

[19] D.M. Ginosar, H.W. Rollins, L.M. Petkovic, K.C. Burch, Int. J. Hydrogen Energy 34, 4065 (2009) in Google Scholar

[20] A. Tonejc, M. Stubičar, A.M. Tonejc, K. Kosanović, B. Subotić, I. Smit, J. Mater. Sci. Lett. 13, 519(1994) in Google Scholar

[21] Q. Yang, Bull. Mater. Sci. 34, 239 (2011) in Google Scholar

Published Online: 2012-9-21
Published in Print: 2012-12-1

© 2012 Versita Warsaw

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Downloaded on 29.9.2023 from
Scroll to top button