In order to understand the function of calcium based sorbents on desulfurization during coal gasification and the effect of impurities on it, a series of tests using three different limestones and four kinds of differ...In order to understand the function of calcium based sorbents on desulfurization during coal gasification and the effect of impurities on it, a series of tests using three different limestones and four kinds of different sodium salts and four kinds different chlorides were conducted by X ray diffraction and X ray photoelectron spectroscopy techniques. The structure of precursory compounds and pretreatment materials were examined by XRD. The binding energy and relative contents of sulfur, calcium and carbon, which exist in different forms in the residues after coal gasification, were measured by means of XPS. The existing forms of sulfur and calcium vary with impurities in limestone. Sodium or chloride play a promotive role on limestone desulfurization, but this promotion is affected by the chemical environment.展开更多
该文利用压汞分析微观手段,对吸收剂孔结构的实验数据提出脱硫剂的孔径分布满足高斯函数分布形式,在此基础上,充分考虑了吸收剂颗粒内部孔结构在硫化反应过程中的变化,建立了干性条件下 SO2和多孔 CaO 反应的孔分布数学模型。模型计算...该文利用压汞分析微观手段,对吸收剂孔结构的实验数据提出脱硫剂的孔径分布满足高斯函数分布形式,在此基础上,充分考虑了吸收剂颗粒内部孔结构在硫化反应过程中的变化,建立了干性条件下 SO2和多孔 CaO 反应的孔分布数学模型。模型计算结果与试验结果吻合较好,能够很好地反映脱硫反应的本质过程,可以用来预测脱硫剂的钙转化率。展开更多
文摘In order to understand the function of calcium based sorbents on desulfurization during coal gasification and the effect of impurities on it, a series of tests using three different limestones and four kinds of different sodium salts and four kinds different chlorides were conducted by X ray diffraction and X ray photoelectron spectroscopy techniques. The structure of precursory compounds and pretreatment materials were examined by XRD. The binding energy and relative contents of sulfur, calcium and carbon, which exist in different forms in the residues after coal gasification, were measured by means of XPS. The existing forms of sulfur and calcium vary with impurities in limestone. Sodium or chloride play a promotive role on limestone desulfurization, but this promotion is affected by the chemical environment.
文摘该文利用压汞分析微观手段,对吸收剂孔结构的实验数据提出脱硫剂的孔径分布满足高斯函数分布形式,在此基础上,充分考虑了吸收剂颗粒内部孔结构在硫化反应过程中的变化,建立了干性条件下 SO2和多孔 CaO 反应的孔分布数学模型。模型计算结果与试验结果吻合较好,能够很好地反映脱硫反应的本质过程,可以用来预测脱硫剂的钙转化率。
