Enhanced separation performance of Hg2+ in desulfurization wastewater using a tannin acid reduced graphene oxide membrane

Study on the Ammonia Emission Characteristics in an Ammonia-Based WFGD System

Review on adsorbents in elemental mercury removal in coal combustion flue gas, smelting flue gas and natural gas

SO2 absorption in highly efficient chemical solvent AChBr + Gly compared with physical solvent ChBr + Gly

Microbial interaction promotes desulfurization efficiency under high pH condition.

Characteristics of Hg0 re-emission in a wet flue gas desulfurization (WFGD) system were investigated on the basis of a bubble column. Five addition agents were used to inhibit Hg0 re-emission and improve removal of gaseous mercury. The results show that SO32– plays an important role in Hg0 re-emission in a WFGD system. Hg0 re-emission is intensified sharply in the presence of SO32– and further intensified with the increase of the SO32– concentration. Hg0 re-emission is strengthened at a higher temperature of desulfurization slurry. However, the removal efficiencies of both Hg2+ and total gaseous mercury decrease significantly with an increasing slurry temperature. The decreasing amplitude of total mercury removal efficiency is slightly higher than that of Hg2+. In addition, the re-emission rate of Hg0 declines first and then increases with an increasing pH value. A least Hg0 re-emission is observed at a pH value of 5.5. Fenton reagent, NaClO, K2S2O8, Na2S, and ethylenediaminetetraacetic acid (EDTA) can in...

Characteristics and Inhibition of Hg0 Re-emission in a Wet Flue Gas Desulfurization System

An experimental research was carried out on formation characteristics of aerosol particles during the Wet Flue Gas Desulfurization (WFGD) process with different ammonia-based desulfurizers. Three desulfurizers of aqueous ammonia, ammonium sulfate, and ammonium sulfite were compared and influences of desulfurization operating conditions were investigated. The results revealed that numerous aerosol particles were produced during the desulfurization process for all three desulfurizers. In terms of the quantity of aerosol particles produced, the aqueous ammonia and ammonium sulfite took the first and second place, respectively. Ammonium sulfate produced the least aerosol particles, with submicron sizes for most cases. For all three desulfurizers, the production rate of aerosol particles increased with increasing liquid-to-gas ratio, pH value as well as the desulfurization liquid temperature; a higher concentration of SO2 in the flue gas resulted in more aerosol particles being generated at a lower pH value of...

Investigation on Formation Characteristics of Aerosol Particles during Wet Ammonia Desulfurization Process

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Characteristics and Inhibition of Hg0 Re-emission in a Wet Flue Gas Desulfurization System

Investigation on Formation Characteristics of Aerosol Particles during Wet Ammonia Desulfurization Process