The invention relates to a mechanochemical process for decontaminating and/or for eliminating problematic, synthetic, biogenic and biological materials A; for breaking down phosphates B; for immobilising metals and the compounds C thereof; for separating carbon dioxide and carbon monoxide D into elements; and for recovering valuable products E. The process comprises: —providing a material F to be milled containing —at least one material A, B, C and/or D and —at least one type of carbon or carbon-yielding material G, or alternatively providing the components of F and G separately from one another; —filling the material F to be milled into a mechanical mill (1), or alternatively —filling the components of the material F to be milled into a mechanical mill (1) and —milling by means of milling elements (1.2) moved by agitation means (1.4) or by means of rollers (1.4.6); after which —the resulting product I is separated from the milling elements (1.2) or the rollers (1.4.6) and is discharged from the milling chamber (1.1) and worked up. The invention also relates to the use of the products I as valuable materials E, the use of a self-cooling electric motor (4) for driving a mechanochemical mill (1), and mechanochemical mills (1) having new agitation means (1.4).

The present disclosure is directed to the use of elemental or speciated iodine and bromine to control total mercury emissions.

The present disclosure is directed to the use of elemental or speciated iodine and bromine to control total mercury emissions.

A sorbent product, including from about 1 wt % to about 99 wt %, based on the total weight of the sorbent product, of at least one base sorbent material; and from about 1 wt % to about 99 wt %, based on the total weight of the sorbent product, of at least one binder. The sorbent product may further include at least from about 0 wt % to about 99% wt %, based on the total weight of the sorbent product, of at least one additional additive. Methods for making same and methods and systems for controlling multiple pollutants are also included.

A sorbent product, including from about 1 wt % to about 99 wt %, based on the total weight of the sorbent product, of at least one base sorbent material; and from about 1 wt % to about 99 wt %, based on the total weight of the sorbent product, of at least one binder. The sorbent product may further include at least from about 0 wt % to about 99% wt %, based on the total weight of the sorbent product, of at least one additional additive. Methods for making same and methods and systems for controlling multiple pollutants are also included.

Sorbent components containing halogen, calcium, alumina, and silica are used in combination during coal combustion to produce environmental benefits. Sorbents such as calcium bromide are added to the coal ahead of combustion and other components are added into the flame or downstream of the flame, preferably at minimum temperatures to assure complete formation of the refractory structures that result in various advantages of the methods. When used together, the components reduce emissions of elemental and oxidized mercury; increase the level of Hg, As, Pb, and/or Cl in the coal ash; decrease the levels of leachable heavy metals (such as Hg) in the ash, preferably to levels below the detectable limits; and make a highly cementitious ash product.

Sorbent components containing halogen, calcium, alumina, and silica are used in combination during coal combustion to produce environmental benefits. Sorbents such as calcium bromide are added to the coal ahead of combustion and other components are added into the flame or downstream of the flame, preferably at minimum temperatures to assure complete formation of the refractory structures that result in various advantages of the methods. When used together, the components reduce emissions of elemental and oxidized mercury; increase the level of Hg, As, Pb, and/or Cl in the coal ash; decrease the levels of leachable heavy metals (such as Hg) in the ash, preferably to levels below the detectable limits; and make a highly cementitious ash product.

The invention relates to a process for removal of metal carbonyl from a gas mixture. The gas mixture is subjected to a gas scrubbing in an absorber with methanol as the physical scrubbing liquid to obtain the laden methanol. The metals of the metal carbonyls are at least partially precipitated from the laden methanol as metal sulfides to obtain a first suspension comprising metal sulfides and at least a proportion of the laden methanol. The first suspension is sent to a treatment vessel and therein brought into direct contact with water vapor in countercurrent to obtain a second suspension comprising at least water, methanol and metal sulfides and a gaseous product. The second suspension and the gaseous product are withdrawn from the treatment vessel as separate streams.

The invention relates to a process for removal of metal carbonyl from a gas mixture. The gas mixture is subjected to a gas scrubbing in an absorber with methanol as the physical scrubbing liquid to obtain the laden methanol. The metals of the metal carbonyls are at least partially precipitated from the laden methanol as metal sulfides to obtain a first suspension comprising metal sulfides and at least a proportion of the laden methanol. The first suspension is sent to a treatment vessel and therein brought into direct contact with water vapor in countercurrent to obtain a second suspension comprising at least water, methanol and metal sulfides and a gaseous product. The second suspension and the gaseous product are withdrawn from the treatment vessel as separate streams.

An activated carbon sorbent composition comprising activated carbon and a passivation agent, wherein the activated carbon sorbent composition exhibits reduced self-heating or auto-ignition properties as compared to the activated carbon. The activated carbon sorbent composition may be utilized to sequester contaminants such as mercury from a flue gas stream. The passivation agent includes a sulfur species, and may be a sulfur oxide compound, a sulfide compound, or an organic sulfur compound. Methods for the manufacture of the activated carbon sorbent composition and for the sequestration of contaminants in a flue gas stream using the composition are also disclosed.