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The effects of limestone type on the sulphur capture of slaked lime

机译：石灰石类型对熟石灰硫捕获的影响

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This study examines the effect of the chemical composition and origin on the performance of two calcitic and two dolomitic limestones from different sources in South Africa. The experiments were carried out in a fixed bed reactor maintained at 80 ℃. The raw sorbent materials were calcined at 900 ℃ and the resulting quicklime hydrated to produce the relevant hydrates which were used in the tests. Results obtained show that the maximum temperature rise during the hydration of the samples varied from 5 to 65 ℃ depending on the chemical composition of the sorbent. Sorbents with higher temperature rise resulted in products with a more porous structure and a better performance in the sulphur capture. The maximum sorbent conversion in terms of mol of SO_2 per mol of sorbent varied from 0.0274 for dolomitic limestones to 0.1823 for the calcitic limestones. The presence of Fe_2O_3 in small quantities was observed to have a positive effect on the performance of the sorbent.
机译：这项研究探讨了化学成分和来源对南非不同来源的两种钙质和两种白云质石灰石性能的影响。实验在保持在80℃的固定床反应器中进行。将原始的吸附剂材料在900℃下煅烧，并将生成的生石灰水化以生成相关的水合物，用于测试。所得结果表明，样品水化过程中的最大温升在5到65℃之间变化，这取决于吸附剂的化学组成。温升较高的吸收剂导致产品具有更多的多孔结构和更好的硫捕获性能。以每摩尔吸附剂的SO 2摩尔数计，最大吸附剂转化率从白云质石灰石的0.0274到钙质石灰石的0.1823不等。观察到少量的Fe_2O_3对吸附剂的性能具有积极的影响。

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