How much CO2 Sodium hydroxide emit when produced?
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How much CO2 Sodium hydroxide emit when produced?

[From: ] [author: ] [Date: 14-05-12] [Hit: ]
having conc. of NaCl of about 23 % W/W and free of Ca and Mg which by Eletrolysis produces NaOH/Cl2 and H2 gas but do not produce CO2 .But to make Pure Brine , pretreatment with Soda ash ,BaCO3,LIME and dilute HCl is carried out for removal of Ca ,......
The actual reaction doesn't produce any CO2. Caustic soda is manufactured using the chloralkali process, whereby brine (salt water) is subject to electrolysis.

If you are talking from an environmental emissions perspective, then the electricity used to carry out the process will have its own carbon footprint, but that depends entirely on how its generated.

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The bulk of NaOH maufacture is by the cholralkali process which involves electrolysis of brine. The process does not directly produce any CO2 but CO2 may or may not be produced indirectly by generation of the energy required for the electrolysis. The actual value would depend on how the electricity was supplied and generated.

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NaOH is produced on large scale from Pure Brine of NaCl solution
having conc. of NaCl of about 23 % W/W and free of Ca and Mg which by Eletrolysis produces NaOH/Cl2 and H2 gas but do not produce CO2 .But to make Pure Brine , pretreatment with Soda ash ,BaCO3,LIME and dilute HCl is carried out for removal of Ca , Mg WHEN CO2 gas is liberated

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