Catalytic reduction of sulfuric acid to sulfur dioxide

被引:8
|
作者
Balla, Ancuta [1 ]
Marcu, Cristina [1 ]
Axente, Damian [1 ]
Borodi, Gheorghe [1 ]
Lazar, Diana [1 ]
机构
[1] Natl Inst Res & Dev Isotop & Mol Technol, Cluj Napoca 400293, Romania
来源
CENTRAL EUROPEAN JOURNAL OF CHEMISTRY | 2012年 / 10卷 / 06期
关键词
Sulfuric acid reduction; Alumina-based catalysts; Iron oxide; Conversion degree; Activity; WATER-SPLITTING CYCLES; METAL-OXIDE CATALYSTS; HYDROGEN-PRODUCTION; HIGH-TEMPERATURE; THERMOCHEMICAL HYDROGEN; DECOMPOSITION; STEP; SO3;
D O I
10.2478/s11532-012-0099-x
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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 - 900A degrees 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 alpha-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 alpha-Fe2O3, a less expensive catalyst, a conversion of 61% for about 60 hours was obtained.
引用
收藏
页码:1817 / 1823
页数:7
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