Sulfur Dioxide Promoted Mercury Fast Deposition over a Selenite-Chloride-Induced Surface from Wet Flue Gas.

Gaseous elemental mercury (Hg) extraction from industrial flue gases is undergoing intense research due to its unique properties. Selective adsorption that renders Hg to HgO or HgS over metal oxide- or sulfide-based sorbents is a promising method, yet the sorbents are easily poisoned by sulfur dioxide (SO) and HO vapor. The Se-Cl intermediate derived from SeO and HCl driven by SO has been demonstrated to stabilize Hg.

Reverse Conversion Treatment of Gaseous Sulfur Trioxide Using Metastable Sulfides from Sulfur-Rich Flue Gas.

Sulfur trioxide (SO) is an unstable pollutant, and its removal from the gas phase of industrial flue gas remains a significant challenge. Herein, we propose a reverse conversion treatment (RCT) strategy to reduce S(VI) in SO to S(IV) by combining bench-scale experiments and theoretical studies. We first demonstrated that metastable sulfides can break the S-O bond in SO, leading to the re-formation of sulfur dioxide (SO).

Regulation of the Sulfur Environment in Clusters to Construct a Mn-SnS Framework for Mercury Bonding.

The remarkable chemical activity of metal-sulfur clusters lies in their unique spatial configuration associated with the abundant unsaturated-coordination nature of sulfur sites. Yet, the manipulation of sulfur sites normally requires direct contact with other metal atoms, which inevitably changes the state of the coordinated sulfur. Herein, we facilely construct a Mn-SnS framework by regulating the sulfur environment of the [SnS] cluster with metal ions.

Strengthen the Affinity of Element Mercury on the Carbon-Based Material by Adjusting the Coordination Environment of Single-Site Manganese.

Mercury, as a highly poisonous pollutant, poses a severe threat to the global population. However, the removal of Hg can only be carried out at below 100 °C due to the weak binding of the adsorbent. Herein, a series of carbon-based materials with different coordination environments and atomic dispersion of single-site manganese were prepared, and their elemental mercury removal performance was systematically investigated.

Metastable Facet-Controlled CuWS Single Crystals with Enhanced Adsorption Activity for Gaseous Elemental Mercury.

Purposively designing environmental advanced materials and elucidating the underlying reactivity mechanism at the atomic level allows for the further optimization of the removal performance for contaminants. Herein, using well facet-controlled I-CuWS single crystals as a model transition metal chalcogenide sorbent, we investigated the adsorption performance of the exposed facets toward gaseous elemental mercury (Hg). We discovered that the decahedron exhibited not only facet-dependent adsorption properties for Hg but also recrystallization along the preferential [001] growth direction from a metastable state to the steady state.

Stepwise Ions Incorporation Method for Continuously Activating PbS to Recover Mercury from Hg-Rich Flue Gas.

Transition metal elements doping is a conventional strategy for the modification of sulfide-based sorbents to obtain preferable Hg adsorption capability. One problem was that such a method could only obtain a temporary promotion to sulfides. To achieve continuous promotion of mercury capture performance, we use the difference of solubility product () between sulfides to develop a postsynthesis approach for stepwise doping of PbS by Cu ions.

Insight into the interfacial stability and reaction mechanism between gaseous mercury and chalcogen-based sorbents in SO-containing flue gas.

Chalcogen-based materials have been confirmed to possess large adsorption capacities for gaseous elemental mercury (Hg) from SO-containing flue gas. However, the interface reaction mechanisms and the interfacial stability are still ambiguous. Here, we selected some commonly used chalcogen-based sorbents (e.

Enhancing the catalytic oxidation of elemental mercury and suppressing sulfur-toxic adsorption sites from SO-containing gas in Mn-SnS.

It is difficult to stabilize gaseous elemental mercury (Hg°) on a sorbent from SO-containing industrial flue gas. Enhancing Hg° oxidation and activating surface-active sulfur (S*) can benefit the chemical mercury adsorption process. A Mn-SnS composite was prepared using the Mn modification of SnS nanosheets to expose more Mn oxidation and sulfur adsorption sites.