What is the molar ratio of Cl2 to H2 produced by electrolysis?
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What is the molar ratio of Cl2 to H2 produced by electrolysis? If it is 1:1, then H2 can react completely; so why add a liquid chlorine unit?
What is the molar ratio of Cl2 to H2 produced by electrolysis? 1:1; the liquid chlorine unit was added because of the reaction between hydrogen and chlorine in the synthesis furnace! In the case of burning at a rate of 1, incomplete combustion can lead to the formation of perchlorine, resulting in a high level of free chlorine in the acid and a yellowish color. If there are subsequent processes involving PVC, the combination of acetylene and chlorine can cause combustion and explosions. Therefore, to ensure complete combustion, hydrogen chloride should not contain any chlorine; hence, chlorine needs to be liquefied. There is another reason for this: chlorine has a wider range of applications than hydrogen chloride, and its price is also higher when expressed in terms of chlorine content. These are all factors that contribute to this practice.
1. Generally, chlorine and hydrogen are not used entirely for synthesizing salts and acids; instead, depending on the amount required of salts and acids, liquefied residual chlorine or some elemental chlorine is used to produce them. 2. Hydrogen is not valuable and can be vented on-site, whereas chlorine is a hazardous chemical that is highly toxic; it can only be consumed or stored. 3. Synthetic salts: During acid production, the chlorine-to-hydrogen ratio is not 1:1; it is at least 1:1.05, and can go as high as 1:1.2 or even 1:1.3. 4. Increasing liquid chlorine allows for better control of the chlorine balance and flexible adjustment of production capacity.
In the caustic soda industry, the production volumes of chlorine and hydrogen (on a molar basis) are 1:1; however, in subsequent processes that consume these gases, the consumption ratio is not 1:1, as it is determined by factors such as the market and the products involved. So when there is an excess of chlorine, it needs to be pressurized and liquefied. There are also times when there is excess hydrogen, but it is transported to downstream processes through pipelines.