Study on absorption of elemental mercury from flue gas by UV/H2O2: Process parameters and reaction mechanism

A review on removal of elemental mercury from flue gas using advanced oxidation process: Chemistry and process

“…Similarly, SO 2 would compete with the oxidants via reactions (87)-(94) to reduce Hg 0 removal (Liu et al , 1616(Liu et al , 2014d(Liu et al , 2015a. 1617 further designed a dry photochemical reactor with built-in UV lamp, which is described in Figure 24 of the dust collector and gas-gas heat exchanger (GGH), and after GGH and before the inlet of the WFGD system.…”

“…A large number of studies 1720 (Liu et al , 2014d(Liu et al , 2015a has shown that, compared with Hg 0 , HgO is easier to remove in a dust 1721 collector or a WFGD device through adsoprtion on fly ash or solution washing. This method has a simple process 1722 and low cost, and can be easily used to revamp the existing thermal power units to achieve mercury removal 1723 in combination with electrostatic/bag type dust collector or WFGD device.…”

Removal of Hg0 and simultaneous removal of Hg0/SO2/NO in flue gas using two Fenton-like reagents in a spray reactor

“…This phenomenon may be explained by the several reasons as follows. Related results indicate that H 2 O 2 in alkaline (9) and (10) [1,[23][24][25].…”

“…For example, with Fe 3+ or Cu 2+ concentration increasing from 0 to 0.02 mol/L, Hg 0 removal efficiency increases from 8.3% to 100% and from 8.3% to 91.3%, respectively. Related results indicate that Hg 0 in flue gas can be oxidized to Hg 2+ by Å OH according to the following reaction (2) [1,[9][10][11][12]23].…”

“…and 55 cm length; Glass) with a reactor lid (16), two nozzles (17), a gas distributor (18), a cylindrical container (19) and a circulating pump (20); (D) An analytical and after-treatment system, including a flue gas analyzer (21), a mercury analyzer (22) and a waste gas absorption tube (23), which is described in the following Fig. 1.…”