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New wet gas sulfuric acid plant operational in China

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Hydrocarbon Engineering,

Bestgrand Chemical Group has successfully started-up its wet gas sulfuric acid (WSA) plant, with a production capacity of 300 000 tpy of sulfuric acid. The plant will treat 131 000 t of acid gas over-the-fence per year from the neighbouring world-scale refinery plant, which is operated by a joint venture between CNOOC (China National Offshore Oil Corp.) and Shell in Huizhou City, China.

Haldor Topsoe was awarded the license, engineering design, technology service, and hardware and catalyst contract for the plant. “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.

WSA is a patented Topsoe technology, including equipment and performance catalysts, that removes sulfur from off-gas streams. WSA converts the sulfurous gases into concentrated sulfuric acid which is re-used in production or sold as a commercial product.

Bestgrand Chemical Group has been focusing on the environmental benefits of using WSA to capture gaseous sulfur and convert it into commercial grade sulfuric acid. It has also been a deciding factor that both the energy efficiency and the heat recovery of the process are very high. The company expects to reduce carbon dioxide emissions by 220 000 tpy and reduce sulfur (SO2) emissions to a level 50% lower than what is required of the sulfuric acid industry.

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