Abstract In the present study, tests were conducted to investigate the behaviour of sulfur capture by calcium based sorbents during oxy-fuel circulating fluidized bed combustion at high oxygen concentrations via a 1MWth pilot-scale oxy-fuel circulating fluidized bed facility. The effects of operating temperature, overall oxygen concentration, and Ca:S molar ratio were taken into consideration. It was determined that the efficiency of sulfur capture during oxy-fuel combustion was higher than that during air combustion. Meanwhile, with the increase of oxygen concentration, the efficiency of sulfur capture increased. Comparing with the optimum temperature for sulfur capture during air combustion, the optimum temperature during oxy-fuel circulating fluidized bed combustion was about 930 °C when the overall oxygen concentration was 50%. In addition, the optimal Ca:S molar ratio was ~ 3.0 during oxy-fuel combustion when various factors were all taken into consideration.

中文翻译：

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1MW中试富氧循环流化床高氧浓度硫酸钙特性

摘要 在本研究中，通过 1MWth 中试规模的氧燃料循环流化床设施，在高氧浓度下进行了氧燃料循环流化床燃烧过程中钙基吸附剂捕硫行为的研究。考虑了操作温度、总氧浓度和 Ca:S 摩尔比的影响。确定氧-燃料燃烧过程中的硫捕获效率高于空气燃烧过程中的硫捕获效率。同时，随着氧浓度的增加，硫捕获效率增加。与空气燃烧时捕硫的最适温度相比，当总氧浓度为50%时，全氧循环流化床燃烧时的最适温度约为930℃。此外，