If you take baking soda and ,,,bake it, it gives off CO2 hence it's use as a raising agent, after it has released the CO2 whot is left in the cake is Sodium Carbonate, washing soda. Schoolboy chemistry!
I find it difficult to buy washing soda where I live so I do bake Bicarb in a baking tray to get washing soda so that I can clean my thermos flask of tea stains.
The article is reporting it backwards, one would use Na2CO3 to capture CO2 which will then become sodium bicarbonate.
Biting the hand that feeds IT
