MERCURY REMOVAL BY SULFIDATED IRON OXIDE

摘要

A mercury removal adsorbent is provided to adsorb and remove mercury contained in flue gas by synthesizing iron oxide from polyferric sulfate produced in the preparation process of titanium oxide and sulfiding the synthesized iron oxide, and a method for preparing the mercury removal adsorbent is provided. A mercury removal adsorbent comprises iron oxide sulfided with a sulfiding gas comprising 0.001 to 2.0 vol.% of a sulfur compound, 1 to 50 vol.% of oxygen, and 48.0 to 98.999 vol.% of a carrier gas based on the total sulfiding gas volume. A preparation method of a mercury removal adsorbent comprises sulfiding iron oxide with a sulfiding gas comprising 0.001 to 2.0 vol.% of a sulfur compound, 1 to 50 vol.% of oxygen, and 48.0 to 98.999 vol.% of a carrier gas based on the total sulfiding gas volume. The preparation method further comprises extrusion molding the iron oxide before or after sulfiding the iron oxide to prepare a mercury removal adsorbent in the form of balls, tablets, pellets, or honeycomb. Further, the mercury is Hg^0, HgCl, HgCl2 and a phase of the mercury is gas.