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Department of Chemical Engineering
Annual Report 2015
1
Title: Environmental protection in practice. Sulfur (S) needs to be removed from oil and gas to reduce corrosion and avoid
acid rain caused by SO2. This photo is from a refinery that the students visited in Brazil. The yellow stuff is elementary sulfur
which was removed from the oil by the catalytic Claus process. Most of the sulfur is used to make sulfuric acid, which again
is mostly used for fertilizer production. The sulfur finally ends up as calcium sulfate (gypsum).