WHITE PAPER
Launched in 1996, VK69 is more relevant than ever
While green might be the color of the 
day, efforts to reduce the impact of industry on 
the environment are nothing new. That’s why in 
1996, Topsoe launched a ground-breaking cesium-
promoted catalyst, the VK69, to help sulfuric acid 
producers cut the SO2 emission of their plants. 
The new intrinsic material, the optimized melt 
composition, and the unique 9 mm Daisy shape 
together resulted in 3 times higher activity for VK69 
compared to conventional catalysts on the market. 
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