The reaction of sodium carbonate with water vapour and carbon dioxide has been studied in the temperature range 343–368 K in pure carbon dioxide, and at pressures of water vapour between 1 × 104 and 5 × 104 N m–2. The products of reaction, sodium hydrogencarbonate and/or wegscheiderite, vary with temperature and pressure, and stability fields are presented. Reaction mechanisms for the formation of wegscheiderite are probably diffusion controlled but are complicated by side reactions. The rate of formation of wegscheiderite is very dependent on the partial pressure of water vapour: analysis of this dependence suggests that sodium carbonate monohydrate is the most likely intermediate.
研究了
碳酸钠与
水蒸气和
二氧化碳在纯
二氧化碳中的反应,温度范围为 343-368 K,
水蒸气压力介于 1 × 104 和 5 × 104 N m-2 之间。反应产物
碳酸氢钠和/或魏格舍得石随温度和压力的变化而变化,并给出了稳定性场。形成麦哲伦石的反应机制可能是扩散控制的,但副反应使其变得复杂。麦饭石的形成速度与
水蒸气分压有很大关系:对这种关系的分析表明,一
水碳酸钠最有可能是中间产物。