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Category:Electronic Arts
Category:Electronic Arts franchises
Category:Video game franchises
Category:Video game franchises introduced in 2004The production of petroleum and natural gas presents an environmental concern because of the emission of certain substances into the air, the ground water, and the water table. These substances include hydrogen sulfide, carbon dioxide, ammonia, methane, ethane, propane, and other flammable gases which may have a harmful effect on health, and other substances such as benzene and other aromatic hydrocarbons which are carcinogens. A need exists for a method and device to remove these harmful substances from the soil, ground water and the air.
U.S. Pat. No. 4,203,959, issued May 20, 1980, describes a catalytic ground water treatment device that includes a reactor vessel and a reactor bed within the vessel. A catalyst is regenerated at the bottom of the vessel by the introduction of air, hydrogen and water, and the regeneration is carried out in a manner which minimizes the production of nitrous oxides. The catalyst is subsequently used to effect reduction of contaminants.
U.S. Pat. No. 4,183,908, issued Jan. 15, 1980, describes a method for removing solid or gaseous pollutants from air by first providing a filter bed through which the air is passed. The bed is desirably constructed of metal or other material which will not react with the pollutants. A catalyst is added to the bed to cause the pollutants to react with a reducing agent such as carbon monoxide. This catalytic reduction is usually carried out at a temperature of about 300.degree.-500.degree. F.
U.S. Pat. No. 4,741,771, issued May 3, 1988, describes a process for the catalytic removal of hydrogen sulfide from gas streams by passing the gas over a catalyst bed at a temperature of from about 150.degree.-800.degree. F., the catalyst having a BET surface area of 0.1-25 m.sup.2 /g. The catalyst may be a Group VIII catalyst or an oxide of a platinum metal or an alloy of a platinum metal. The gas may be treated on a continuous or batch basis. The catalyst is regenerated at temperatures of 300.degree.-600.degree. F. by removal of carbon monoxide.
U.S. Pat. No be359ba680
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