"Haldor Topsoe is proud to be awarded the license, engineering design, tech service, and hardware & catalyst contract for the world’s largest WSA plant by Bestgrand Chemical Group. The successful start-up is a milestone for the WSA technology both in China and globally, and it proves that this technology has an important role to play in reducing harmful sulfur emissions in a commercially sound way," says Frank Lei, Senior Sales Director, Topsoe in China.Since 2000, Topsoe has sold 68 WSA plants in China, 54 are already on stream, and 14 plants are being constructed.WSA is a patented Topsoe technology, including proprietary equipment and performance catalysts, that removes sulfur from off-gas streams in the refining industry, chemical production from coal, and steel production. WSA converts the sulfurous gases into concentrated sulfuric acid which is re-used in production or sold as a commercial product.