The invention relates to a facility for purification by adsorption of gaseous flow comprising at least one impurity which has a corrosive effect on carbons steel, comprising a radial adsorber comprising a housing with an outer envelope made of carbon steel; a vertical perforated inner grating consisting of a corrosion-resistant material, a vertical perforated outer grating, an adsorbent which is held vertically by the outer grating and the inner grating, and allows at least partial blockage of the corrosive impurity, and a means for allowing a centrifugal circulation of the gaseous flow.

A flue gas stream arising from fossil fuel fired sources containing nitrogen oxide contaminants is conveyed through an exhaust duct into a quencher. In the quencher aqueous medium is sprayed into contact with the flue gas stream. The quenched flue gas stream is mixed with ozone distributed at a high velocity in a sub-stoichiometric amount for partial oxidation of NO.sub.xto form NO.sub.2 and prevent the formation of N.sub.2O.sub.5. The flue gas containing NO.sub.2 is absorbed into an acidic medium of a wet scrubber to form nitrous acid. In the scrubber the nitrous acid is mixed with selected compounds of ammonia to decompose the nitrous acid for release of nitrogen. With this process the consumption of ozone and the operating costs associated therewith eliminate the requirement to dispose of nitrate recovered from the scrubber purge stream.

A process and system for producing a fermentable gas stream from a gas source that contains one or more impurity which may be harmful to the fermentation process is provided. To produce the fermentable gas stream, the gas stream is passed through a specifically ordered series of removal beds. The removal beds remove and/or convert various impurities found in the gas stream which may have harmful effects on downstream removal beds and/or inhibitory effects on downstream gas fermenting microorganisms. At least a portion of the fermentable gas stream may be capable of being passed to a bioreactor, which contains gas fermenting microorganisms.

A new adsorbent CO.sub.2-ONE for removal of acidic gases such as carbon dioxide and hydrogen sulfide was developed from hydrothermal reaction of natural limestone with natural kaolin via sodium hydroxide. Several synthesis conditions were employed such as initial concentration of NaOH, weight ratio of limestone to kaolin, reaction temperature and pressure. The produced CaNaSiO2Al2O3 samples were characterized using XRD and EDS and showed that a mixture of Gehlenite Ca.sub.2Al(A.sub.1.22Si.sub.0.78O.sub.6.78)OH.sub.0.22 and Stilbite Na.sub.5.76Ca.sub.4.96(Al.sub.15.68Si.sub.56.32O.sub.144) with percentage of 43 and 57 was successfully produced, respectively. Another produced sample showed the presence of Gehlenite Ca.sub.2Al(Al.sub.1.22Si.sub.0.78O.sub.6.78)OH.sub.0.22, Stilbite Na.sub.5.76Ca.sub.4.96(Al.sub.15.68Si.sub.56.32O.sub.144) and Lawsonite CaAl.sub.2Si.sub.2O.sub.7OH.sub.2(H.sub.2O) with percentage of 4.1 and 7.4 and 88, respectively.

A method for conversion of greenhouse gases comprises: introducing a flow of a dehumidified gaseous source of carbon dioxide into a reaction vessel; introducing a flow of a dehumidified gaseous source of methane into the reaction vessel; and irradiating catalytic material in the reaction vessel with microwave energy. The irradiated catalytic material is heated and catalyzes an endothermic reaction of carbon dioxide and methane that produces hydrogen and carbon monoxide. At least a portion of heat required to maintain a temperature within the reaction vessel is supplied by the microwave energy. A mixture that includes carbon monoxide and hydrogen can undergo catalyzed reactions producing multiple-carbon reaction products in a lower-temperature portion of the reaction vessel.

A gas treatment plant (3) for treating an industrial waste gas comprising carbon dioxide comprises an oxyfuel boiler (100) and a pipe (109; 122; 180) arranged for forwarding the industrial waste gas to the oxyfuel boiler (100) and injecting the industrial waste gas into the oxyfuel boiler (100) to participate in the combustion process occurring in the boiler (100) to cause oxidation of at least a portion of the content of at least one oxidizable substance of the industrial waste gas. The gas treatment plant (3) further comprises a gas cleaning system (108), and a pipe (126) for forwarding a carbon dioxide rich flue gas generated in the boiler (100) to the gas cleaning system (108) for being cleaned therein, such that an at least partly cleaned carbon dioxide rich flue gas is formed.

Systems and methods for reducing the capital and operating costs of a smelting process system and improving the environmental impact of the smelting process using an IGT system to remove and filter environmentally hazardous gases and particulates from each electrolytic cell in the smelting process system.

Gaseous perfluorocarbons in a waste gas are adsorbed by an adsorption device. Subsequently a decomposition of the perfluorocarbons takes place with formation of hydrogen fluoride. The hydrogen fluoride is converted with an oxide of a metal to be reduced, to the metal fluoride thereof. The metal fluoride formed is then fed again to the reduction process.

A direct reduced iron manufacturing system includes a gas reformer for supplying steam to reform natural gas, a gas heater being a heating unit for heating a reformed gas reformed by the gas reformer to a predetermined temperature, a direct reduction furnace for reducing iron ore directly into reduced iron using a high-temperature reducing gas, an acid gas removal unit having an acid gas component absorber and a regenerator for releasing the acid gas, and a recovery gas introduction line for supplying a recovery gas released from the regenerator to each of a reforming furnace of the gas reformer and a furnace of the gas heater.

Disclosed is an aqueous solution for absorbing and recovering carbon dioxide from a carbon dioxide-containing gas, the aqueous solution containing an amino alcohol compound represented by Formula 1 and an amine compound represented by Formula 2, ##STR00001## wherein R represents an alkyl group having 1 to 5 carbon atoms; and n represents 1 or 2, ##STR00002## wherein X represents NR1R2; Y represents NR3R4; R1, R2, R3 and R4 may be the same or different, and each represents an alkyl group having 1 to 3 carbon atoms; and m represents an integer of 3 to 7.