Pilot-Scale Experimental Investigation on Dry Capture of Mercury and SO₃ in Smelting Gas of Acid Making.

ABSTRACT: In this study, a novel dry capture process utilizing a mixed adsorbent of ZnO and CuS was proposed for the simultaneous removal of Hg⁰ and SO₃ in flue gas from zinc smelting, addressing severe mercury pollution and high SO₃ concentrations. The experimental results showed that flue gas cooling caused the SO₃ to transform into sulfuric acid mist, which changed the reaction mechanism from a gas-solid to a liquid-solid reaction and helped to improve the SO₃ removal efficiency. Additionally, properly increasing the absorbent/SO₃ molar ratio significantly improved the SO₃ removal performance. However, excessive absorbent injection could cause aggregation and uneven dispersion of the absorbent particles in the flue gas,

SUBMITTER: Liu W 

PROVIDER: S-EPMC10652368 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature