Is the hydrogen used to produce polysilicon all H2 produced by electrolyzing water?
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This post was last edited by sunjl1981 on 2013-1-6 at 22:44. Is the hydrogen used to produce polycrystalline silicon all H2 produced by water electrolysis? What is the required H2 content? Or what is the maximum allowable oxygen content? # + + .
Most polysilicon manufacturers use water electrolysis to produce hydrogen, as the hydrogen obtained through this method has a high purity; our company requires an oxygen content of less than 1 ppm.
Hydrogen can be produced by electrolysis, or it can be produced by the cracking of methanol. As for the purity of hydrogen, a pressure swing adsorption unit can be used to remove impurity ions such as chloride ions that may be present in hydrogen produced by electrolysis, as well as to remove oxygen. Our company has installed such a unit, and it works well; the purity of the hydrogen obtained is generally around 99.99%, and it also helps to remove water.