Catalytic reduction of sulfuric acid to sulfur dioxide

• Authors: Ancuţa Balla , Cristina Marcu , Damian Axente , Gheorghe Borodi , Diana Lazăr
• Languages of publication: EN

Abstracts

EN

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. [...]

Keywords

EN

Sulfuric acid reduction; Alumina-based catalysts; Iron oxide; Conversion degree; Activity

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2012
• Volume: 10
• Issue: 6
• Pages: 1817-1823

Dates

published

1 - 12 - 2012

online

21 - 9 - 2012

Contributors

author

Ancuţa Balla

• National Institute for Research and Development of Isotopic and Molecular Technologies, 400293, Cluj-Napoca, Romania

author

Cristina Marcu

• National Institute for Research and Development of Isotopic and Molecular Technologies, 400293, Cluj-Napoca, Romania

author

Damian Axente

• National Institute for Research and Development of Isotopic and Molecular Technologies, 400293, Cluj-Napoca, Romania

author

Gheorghe Borodi

• National Institute for Research and Development of Isotopic and Molecular Technologies, 400293, Cluj-Napoca, Romania

author

Diana Lazăr

• National Institute for Research and Development of Isotopic and Molecular Technologies, 400293, Cluj-Napoca, Romania

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Identifiers

DOI

10.2478/s11532-012-0099-x