The Effect of Deposit Temperature on the Catalytic SO2-to-SO3 Conversion in a Copper Flash Smelting Heat Recovery Boiler

The aim of the work was to study the catalytic role of copper flash smelter deposit in the SO 2 -to-SO 3 conversion. In addition, the effect of process gas temperature at 548 K to 1173 K (275 °C to 900 °C) on the amount of SO 3 formed was addressed both in the absence and presence of genuine copper...

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Veröffentlicht in:	Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2018-02, Vol.49 (1), p.434-439
Hauptverfasser:	Lehmusto, Juho, Vainio, Emil, Laurén, Tor, Lindgren, Mari
Format:	Artikel
Sprache:	eng
Schlagworte:	Boilers Catalytic converters Characterization and Evaluation of Materials Chemistry and Materials Science Conversion Copper Copper converters Dew point Dust Flash smelting Gas temperature Heat recovery Materials Science Metallic Materials Metallurgy Nanotechnology Smelting Structural Materials Sulfuric acid Surfaces and Interfaces Thin Films
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Zusammenfassung:	The aim of the work was to study the catalytic role of copper flash smelter deposit in the SO 2 -to-SO 3 conversion. In addition, the effect of process gas temperature at 548 K to 1173 K (275 °C to 900 °C) on the amount of SO 3 formed was addressed both in the absence and presence of genuine copper flash smelter deposit. The SO 3 conversion rate changed as a function of process gas temperature, peaking at 1023 K (750 °C). A dramatic increase in the SO 2 -to-SO 3 conversion was observed when process dust was present, clearly indicating that process dust catalyzes the SO 2 -to-SO 3 conversion. Based on these results, the catalytic ability of the deposit may lead to sulfuric acid dew point corrosion.
ISSN:	1073-5615 1543-1916
DOI:	10.1007/s11663-017-1130-6