The use of a sulfur-impregnated organoclay provides a mercury or arsenic removal media having increased reactivity, stability, and mercury removal ability. The Hg/As removal media described herein is prepared by impregnating an organophilic clay with elemental (free state) sulfur. Alternatively, the clay can be made organophilic by onium ion reaction prior to or simultaneously with impregnating the organoclay with sulfur.

Sulfur-impregnated organoclay mercury and/or arsenic ion removal media

A method for operating a fluidized-bed reactor includes introducing an alkali-containing material into a fluidized-bed reactor and introducing hydrous clay into the fluidized-bed reactor, the hydrous clay having a moisture content of at least about 5% by weight. The method further includes heating at least a portion of the alkali-containing material and hydrous clay, such that at least a portion of the hydrous clay is at least partially calcined and the at least partially calcined clay adsorbs at least a portion of alkali present in the fluidized-bed reactor. The method further includes removing at least a portion of the at least partially calcined clay and adsorbed alkali from the fluidized-bed reactor.

Methods for operating a fluidized-bed reactor

The invention concerns a method for reducing heavy metals, in particular mercury, present in flue gases comprising a step which consists in contacting the flues gases with a sorbent solid matter in dry state wherein the sorbent solid matter is a non functionalized metal compound.

Method for reducing heavy metals in flue gases

The invention relates to a solid inorganic composition for reducing dioxins and furans, as well as heavy metals, in particular mercury, present in flue gases, to a method for preparing such a composition, and to the use thereof for reducing dioxins and furans as well as heavy metals, in particular mercury, present in flue gases, by contacting said flue gases with said solid inorganic composition.

Solid inorganic composition, method for preparing same, and use thereof for reducing dioxins and heavy metals in flue gases

The invention relates to a solid mineral composition of heavy metals, in particular mercury, in flue gas, to a method for preparing such a solid mineral compound and to the use thereof for reducing heavy metals, in particular mercury, in flue gas, by placing the flue gas in contact with the solid mineral composition.

Solid mineral composition, method for preparing same and use thereof for reducing heavy metals in flue gas

Procedure for sulphuration of natural silicates in order to retain vapours of metals Procedure for preparation of sulphurated materials from natural silicates and the use thereof for retaining vapours of metals such as mercury The adsorbent products prepared by the procedure of the invention can be used in the elimination of mercury from gas streams resulting from industrial processes: exhaust gases from thermal power stations, mining, the chloro-alkali industry, urban waste incineration, processing and combustion of fossil fuels, coal, natural gas or petroleum, gasification of coal, and recycling of products (batteries) The present invention relates to the use of natural silicates such as sepiolite, palygorskite or bentonite to the preparation thereof (mechanical, thermal or chemical treatment) to the various procedures for deposition of sulphur in such a way that they can be applied for the retention of vapours of mercury or other heavy metals and to the strategy for the use of solids with reference to sizes, composition, area/volume ratio, depending on the process for purification

Bermejo P

Papers

Procedure for sulphuration of natural silicates in order to retain vapours of metals.