压缩空气和二氧化碳之间的差异|比较类似术语之间的差异

Thekey difference在压缩空气和二氧化碳之间the压缩空气的压力远高于正常atmospheric pressure虽然我们通常在低压下存储二氧化碳.

The atmosphere consists of various gases and particles, which we need for various purposes. Oxygen is one of the most crucial things on the earth which determines the survival of living things. Other than that carbon dioxide is also important for the survival due to its importance inphotosynthesis. Except for these natural phenomena, people developed methods to make use of air to fulfil their various needs.

内容

1.Overview and Key Difference
2.What is Compressed Air
3.什么是二氧化碳
4.Side by Side Comparison – Compressed Air vs Co2 in Tabular Form
5.概括

What is Compressed Air?

Compressed air is the air that is under pressure, consisting of oxygen, nitrogen, carbon dioxide and all the other gases in the atmosphere. Further, this air is at a higher pressure than the normal atmospheric pressure. It has many usages, mainly in producing energy. However, it is more expensive than the other energy producing resources like electricity, water and natural gas.

图01：压缩气缸

更重要的是，我们可以使用压缩空气作为储能的方法。当我们压缩空气时，会产生大量热量，压缩后空气变暖。空气减压需要热量。因此，我们可以存储压缩过程中产生的热量，并在减压期间以后使用。

Further, compressed air is useful for vehicles, railway braking systems, diesel engine cranking, cleaning electronic devices, air tools, etc. Compressed air tanks are expensive, and they need an advanced regulator to maintain a constant flow of the same-pressured air.

什么是二氧化碳?

Carbon dioxide is a molecule that forms from a carbon atom and two oxygen atoms. Each oxygen atom forms a double bond with carbon, and thus, the molecule has a linear geometry. The molecular weight of this compound is 44 g mole^-1.

Carbon dioxide (CO₂) is a colourless gas, and upon the dissolution in water, it forms carbonic acid. Moreover, this gas is denser than air. The concentration of carbon dioxide is 0.03% in the atmosphere. The carbon cycle balances the CO₂在大气中。此外,这个gas emits to the atmosphere through natural processes such as respiration, volcano eruption, and through human activities like fossil fuel burning in vehicles and factories.

Key Difference Between Compressed Air and CO2

Figure 02: CO2 Cylinders

In contrast, this gas removes from the atmosphere in photosynthesis, and they can deposit as carbonates in the long run. However, the human interference (fossil fuel burning, deforestation) causes an imbalance in the carbon cycle, increasing CO₂gas level. Global environmental problems likeacid rain,greenhouse effect and global warmingare results of that. Carbon dioxide is useful to make soft drinks, in the bakery industry, as fire extinguishers, etc.

Furthermore, carbon dioxide tanks are readily available, and we can easily buy them. Also, they cost less. As a result, their maintenance is easy and doesn’t need an advanced regulator. Carbon dioxide can be stored as a liquid in low pressure. However, they are unreliable at low temperatures.

What is the Difference Between Compressed Air and CO2?

压缩空气是处于压力下的空气，由氧，氮，二氧化碳以及大气和CO中的所有其他气体组成₂is a gaseous molecule that forms from a carbon atom and two oxygen atoms. The key difference between compressed air and CO2 is that the pressure of compressed air is much higher than the normal atmospheric pressure while we usually store carbon dioxide at low pressure.

Moreover, Compressed air is more expensive than carbon dioxide. As another important difference between compressed air and CO2, the Carbon dioxide tanks are easy to find and doesn’t need advanced regulators like compressed air tanks do.

The below infographic gives more information on the difference between compressed air and CO2.

摘要 - 压缩空气与CO2

Compressed air and CO2 are very important gaseous sources. The key difference between compressed air and CO2 is that the pressure of compressed air is much higher than the normal atmospheric pressure while we usually store carbon dioxide at low pressure.

Reference:

1.Britannica, The Editors of Encyclopaedia. “Compressed Air.” Encyclopædia Britannica, Encyclopædia Britannica, Inc., 27 Sept. 2013.Available here
2.“Carbon Dioxide.” National Center for Biotechnology Information. PubChem Compound Database, U.S. National Library of Medicine.Available here