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- W2010731947 abstract "Experiments and reaction equilibrium calculations were carried out for the SO2 gas and oilsands fluid coke system. The goal was to develop a coke-based sulfur-producing flue gas desulfurization (SP-FGD) process that removes SO2 from flue gases and converts it into elemental sulfur. The conversion of SO2 to elemental sulfur proceeded efficiently at temperatures higher than 600 °C, and the sulfur yield reached a maximum (>95%) at about 700 °C. An increase of temperature beyond 700 °C enhanced the reduction of product elemental sulfur, resulting in the formation of reduced sulfur species (COS and CS2), which lowered the sulfur yield at 900 °C to 90%. Although equilibrium calculations suggest that a lower temperature favors the conversion of SO2 as well as the yield of elemental sulfur, experiments showed no formation of elemental sulfur at 600 °C and below, likely due to hindered kinetics. Faster reduction of SO2 was observed at a higher temperature in the range of 700−1000 °C. A complete conversion of SO2 was achieved in about 8 s at 700 °C. Prolonging the product gas−coke contact, the yield of elemental sulfur decreased due to the formation of COS and CS2 while the SO2 conversion remained complete. Equilibrium calculations suggest that the ultimate yield of elemental sulfur maximizes at the C/SO2 ratio of 1, which represents the stoichiometry of SO2 + C → CO2 + S. For the C/SO2 ratio < 1, equilibrium calculations predict elemental sulfur and CO2 being major products, suggesting that SO2 + C → CO2 + S is the predominant reaction if SO2 is in excess. Experiments revealed that elemental sulfur and CO2 were only major products if the conversion of SO2 was incomplete, which is in agreement with the result of the equilibrium modeling." @default.
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- W2010731947 date "2001-01-18" @default.
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- W2010731947 title "A Study on Carbothermal Reduction of Sulfur Dioxide to Elemental Sulfur Using Oilsands Fluid Coke" @default.
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- W2010731947 doi "https://doi.org/10.1021/es001581v" @default.
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