The high concentration of SO₂ and SO₃ under oxy-fuel combustion atmosphere is conducive to the sulfation of alkali metals. In order to investigate the effect of SO₂ and SO₃ on the distribution of Na/S/Cl and ashes characteristics of Zhundong coal during oxy-fuel combustion, a series of experiments were carried out in a 50 kW CFB oxy-fuel combustor system. The results showed that both SO₂ and SO₃ could realize the sulfation reaction of NaCl. It would enhance the distribution of sodium to the bottom ash and the circulating ash, the chlorine to the flue gas, so as to reduce the content of sodium and chlorine in deposit. In addition, the contents of Ca and Mg increased in the deposits and decreased in the fly ashes as the SO₂ and SO₃ were added, while the contents of Fe were all decreased in the deposits and fly ashes. Compared with SO₂, SO₃ is more prone to the sulfation reaction. While increasing the addition of SO₂ and SO₃ could strengthen the sulfation reaction. In addition, the deposit and fly ash generated by Zhundong coal combustion could be divided into two parts: particles less than 10 μm formed by condensation of sodium, chlorine and other components; particles larger than 10 μm formed by crushing of coal ash. Introducing SO₂ and SO₃ made the surface structure of deposit more porous, but the BET surface area of fly ash declined. There was no obvious difference of particle size distribution of deposit.

在氧-燃料燃烧气氛下高浓度的SO ₂和SO ₃有助于碱金属的硫酸化。为了研究SO ₂和SO ₃对氧燃料燃烧过程中准东煤的Na / S / Cl分布和灰分特性的影响，在50 kW CFB氧燃料燃烧器系统中进行了一系列实验。 。结果表明，SO ₂和SO _3均可以实现氯化钠的硫酸盐化反应。它将增加钠在底灰和循环灰中的分布，以及氯在烟道气中的分布，从而减少沉积物中钠和氯的含量。另外，随着SO ₂和SO ₃的添加，沉积物中Ca和Mg的含量增加而飞灰中的含量降低，而沉积物和飞灰中的Fe含量全部降低。与SO ₂相比，SO ₃更易于发生硫酸化反应。在增加SO ₂和SO _{3的添加量的同时}可以加强硫酸化反应。另外，准东煤燃烧产生的沉积物和粉煤灰可分为两部分：钠，氯和其他成分的缩合形成的小于10μm的颗粒；煤灰粉碎形成的大于10μm的颗粒。SO ₂和SO _3的引入使沉积物的表面结构更加多孔，但粉煤灰的BET表面积却下降了。沉积物的粒度分布没有明显差异。