钾修饰铁锆氧载体制备及煤化学链燃烧中钾元素赋存形态探究

考察了制备条件对载氧体性能的影响,并通过HSC Chemistry考察了温度与还原度(R_(ox))对钾元素赋存形态的影响。结果表明,最佳制备条件为:ZrO_(2)的添加量为30%,K_(2)CO_(3)的添加量为5%,载氧体的煅烧温度为800℃。煤过量或较高时钾元素的赋存形态主要为气态钾单质K(g)。而在系统中载氧体含量足量或过量时,在高温时钾元素的主要赋存形态转变为了KFeO_(2)。并且只有在反应温度较低且载氧体还原程度较深时,钾元素才能保持以K_(2)CO_(3)的原形式存在。

Effect of Fertilizer N Forms on Physiological Metabolism and Potassium Uptake of Flue-Cured Tobacco

The growth, chlorophyll composition, photosynthesis, respiration, K uptake and root K+ secretion offlue-cured tobacco as thected by different concentrations of N supplied as urea, NaNO3 and NH4NO3 werestudied under the experimental condition of sand culture. The results showed that the content of K in thefiue-cured tobacco was not merely related with root vitality and uptake but also closely related with root cellmembrane structure and K+ secretion.