惰性载体对CaSO4载氧体化学链燃烧性能的影响

为提高化学链燃烧中CaSO₄载氧体的机械强度和反应活性,采用机械混合法制备了负载甘油、硅溶胶以及拟薄水铝石惰性载体的CaSO₄载氧体,并对其机械强度、反应特性等进行了实验研究。结果表明,甘油和硅溶胶的加入可显著提高CaSO₄载氧体的机械强度,而拟薄水铝石作用较小。热重还原实验表明,甘油和硅溶胶的加入可加快载氧体与甲烷的反应速率,缩短反应时间。XRD分析表明,惰性载体的加入不会影响CaSO₄向CaS转化,CaSO₄接近完全转化。

Effect of binders on the performance of CaSO4 oxygen carrier in chemical looping combustion

In order to improve the mechanical strength and reactivity of CaSO₄ oxygen carrier, the addition of glycerinum, silica sol and pseudo-boehmitewere to CaSO₄ oxygen carriers was applied by mechanical mixing, and the effect on the mechanical strength and the characteristics of reaction was experimentally investigated. The results show that the addition of glycerinum and silica sol significantly improves the mechanical strength of CaSO₄ oxygen carrier, while the pseudo-boehmite has little effect. TGA results indicate that the addition of glycerinum and silica sol can accelerate the reaction rate and decrease the reaction time. The XRD analysis demonstrates that the addition of binders doesn''t affect the conversion from CaSO₄ to CaS and the conversion is nearly complete.