铅室过程和接触过程之间的差异| Compare the Difference Between Similar Terms

Thekey differencebetween lead chamber process and contact process is thatthe lead chamber process uses gaseous氮氧化物as acatalyst，而接触过程使用五氧化钒.

Lead chamber process and contact process are important industrial processes we use for the production ofsulfuric acidin large scale. However, the lead chamber process is the old method, and it has now largely been replaced by the contact process. It is because the contact process is more economical and uses less expensive catalysts; not only that, this process produces sulfur trioxide and oleum as well.

1.Overview and Key Difference
2.What is a Lead Chamber Process
3.What is a Contact Process
5.Side by Side Comparison – Lead Chamber Process vs Contact Process in Tabular Form
6.概括

What is a Lead Chamber Process?

Lead chamber process is the older method of producing sulfuric acid in the industrial scale. However, it still meets about 25% of the current sulfuric acid production. Nevertheless, this method is not very popular at present because of the high production cost compared to the final outcome.

图01：不同国家生产硫酸

Further, this process uses gaseous nitrogen oxide as the catalyst. In the process, we need to introduce sulfur dioxide into large chambers along with steam and nitrogen dioxide. These large chambers are lined with sheets of lead. Inside the chambers, there is a system which sprays the gases along with water and camber acid. Generally, the chamber acid we use is 70% sulfuric acid. We then need to let the sulfur dioxide and nitrogen dioxide dissolve in water for 30 minutes. Nitrogen dioxide speeds up the reaction but is not consumed during the progression of the reaction. In this chamber, sulfur dioxide oxidizes into sulfuric acid. However, this process is highly exothermic and releases high heat energy.

What is a Contact Process?

接触过程是在工业尺度上大量生产大量硫酸的现代方法。同样，该方法在高浓度中产生硫酸。早些时候，人们使用白金作为反应的催化剂，但是由于成本高，我们现在使用五氧化钒。该过程的重要性是它也产生三氧化硫和油硫，并且该过程非常有效。

在此过程中，第一步包括与氧的组合硫形成二氧化硫。然后，我们需要从净化单元纯化产生的二氧化硫。接下来，我们必须在存在五氧化钒催化剂的情况下，在这种二氧化硫中添加过量的氧气。此步骤形成三氧化硫。然后将这种三氧化硫添加到硫酸中。它给出了含二硫酸的油脂。最后一步是在水中添加油脂，从而使硫酸以非常浓缩的形式。

铅室过程和接触过程之间有什么区别？

有两个主要过程我们用硫酸acid production: lead chamber process and contact process. The key difference between lead chamber process and contact process is that the lead chamber process uses gaseous nitrogen oxides as a catalyst, whereas the contact process uses vanadium pentoxide. Furthermore, the reactants for the lead chamber process are sulfur trioxide and steam while the reactants for the contact process are sulfur, oxygen and moist air. Moreover, the final product of the lead chamber process is sulfuric acid, but the contact process produces sulfur trioxide and oleum as well. So, this is also a difference between lead chamber process and contact process.

概括– Lead Chamber Process vs Contact Process

There are two major processes for sulfuric acid production: lead chamber process and contact process. The key difference between lead chamber process and contact process is that the lead chamber process uses gaseous nitrogen oxides as a catalyst, whereas the contact process uses vanadium pentoxide.

Reference:

1.“室内过程。”Encyclopædia Britannica, Encyclopædia Britannica, Inc.,Available here.