I. Overview
The magnesium oxide desulfurization process is currently the most mature desulfurization process on the market after the calcium method. It is widely used around the world because of its broad application prospects. According to data, this process has been widely used in Japan and has been successfully used in more than 100 projects. At the same time, 95% of power stations in Taiwan also adopt the magnesium oxide desulfurization process, which has achieved very significant environmental benefits. In addition, European and American countries have also begun to gradually adopt the magnesium oxide desulfurization process, which shows that its application prospects are broad and will be more widely used in the future.
2. Advantages of magnesium oxide desulfurization
1. High desulfurization efficiency: The chemical reaction activity of magnesium oxide is much greater than that of calcium-based desulfurizers, and the molecular weight of active magnesium oxide is smaller than calcium carbonate and calcium oxide. Under the same conditions, the desulfurization efficiency of magnesium oxide is higher than that of calcium carbonate and calcium oxide. Desulfurization efficiency of calcium method.
2. Low operating costs and reliable operation.
3. Low investment costs.
3. Effect of magnesium oxide activity on desulfurization efficiency
The activity of magnesium oxide in the desulfurization reaction refers to its ability to react with water to generate magnesium ions and hydroxide ions. This ability directly affects the desulfurization efficiency, because the hydration product of magnesium oxide can react with sulfur dioxide to form magnesium sulfate and magnesium hydroxide precipitates.
When magnesium oxide undergoes a hydration reaction, it first absorbs surrounding water molecules and undergoes a chemical reaction to form a surface layer of magnesium hydroxide. This surface layer is not stable and will quickly spread into the surrounding water until the solution is saturated to form a precipitate. In this process, highly active magnesium oxide will have a larger surface area and higher porosity, allowing it to have a larger contact area with water, thereby generating magnesium ions and hydroxide ions faster, so it can be It absorbs dissolved sulfur dioxide and improves the desulfurization efficiency.
In contrast, when low-activity magnesium oxide undergoes a hydration reaction, it is difficult to generate magnesium ions and hydroxide ions due to its small surface area, low porosity, and small contact area with water. This means that its ability to absorb dissolved sulfur dioxide is weak, resulting in poor desulfurization efficiency.
To sum up, magnesium oxide is a very important product in the desulfurization reaction and has very good development prospects. However, the above are all based on the premise that the quality of magnesium oxide products is good, so pay attention to the quality of the products when purchasing.