What is being removed through the decarburization of the secondary brine after passing through the resin column?
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①What is being removed through the decarburization of the secondary brine after passing through the resin column? ②What are the risks if it’s not removed? ③Why is decarburization not included in the original design of some processes? For example, Woody’s electrolyzer.
Could you explain in detail what “decarbonization” means?
I just heard about this new term; in Asahi Kasei’s secondary brine process, decarburization is not carried out either. Could the original poster provide more details so we can learn together?*
Decarboxylation refers to the removal of carbonate ions, which is achieved by adding acid; otherwise, the chlorine gas produced will contain carbon dioxide, affecting its purity.
Is the so-called carbonate referred to as that caused by the excess Na2CO3 added to remove Ca2+ from brine?
Yes, it is. Whether a decarbonization process is needed depends on the user’s requirements.
The secondary brine coming out of the resin tower is neutralized by adding acid, thereby reducing the impact of fluctuations in the pH of the concentrated brine on the acid addition process in the electrolyzer, while also removing carbon dioxide. This method is feasible, but it requires a storage tank (made of titanium) and a titanium pump, which entails certain investment costs as well as ongoing operational expenses.
This is the first time I’ve heard of it. Could someone familiar with this technology please explain in detail which companies are using it? How effective is it?