Fuel additives, additive compositions and methods of employing same to prevent corrosion of metal surfaces in contact with hot gaseous combustion products
AssigneeThe Perolin Company, Inc.
InventorJames F. Scott
Life of this patent
Estimating the term…
Abstract
A fuel additive composition useful for incorporation in or admixture with fuels, particularly fuels containing vanadium and/or sodium as a contaminant such that upon combustion of the fuels containing or in the presence of said additive composition metal surfaces in contact with the resulting hot gaseous fuel combustion products are subject to less corrosion, contains one or more compounds providing the elements or elemental components magnesium, silicon, chromium and chlorine, these elements Mg, Si plus Cr, Cl being present in the additive composition in the weight ratio 1/>0.5/>1.0, respectively, the amount of Si to Cr being in the ratio 1:0.1-10.
Claims46
A fuel additive composition useful for incorporation in or admixture with fuels such that upon combustion of the fuels or in the presence of said additive composition when introduced into the fuel combustion products, metal surfaces in contact with said combustion products are subject to reduced corrosion and ash deposition, said additive composition consisting essentially of one or more compounds containing the elements selected from the group consisting of magnesium, silicon, chromium and chlorine, said elements Mg, Si plus Cr, Cl being present in said additive composition in the weight ratio 1/>0.5/>1.0, respectively, the compound or compounds in said composition containing said elements silicon and magnesium forming or providing the compounds SiO.sub.2 and MgO, respectively, in said combustion products in the weight ratio of at least 1 part SiO.sub.2 to 1 part of MgO.
In the combustion of a fuel for power generation or heat production or the like wherein hot combustion products come into contact with a metal surface subject to corrosion and deposits due to contact by said hot combustion products containing vanadium in combined form and/or sodium in combined form, the impovement to reduce corrosion and ash deposition at a temperature of at least about 1400.degree. F. which comprises providing in said vanadium-containing and/or sodium-containing hot combustion products at least 0.5 part by weight each of magnesium and chlorine for each part by weight vanadium in said hot combustion products and at least a total of 0.5 part weight silicon and/or chromium by each part by weight sodium in said hot combustion products, and providing in said hot combustion products an amount of SiO.sub.2 and MgO such that the weight ratio of SiO.sub.2 to MgO in said hot combustion products is at least 1.
A process for operating a gas turbine by the combustion of a fuel wherein the resulting hot gaseous combustion products come into contact with the metal surfaces and blades of the gas turbine to drive or operate the same and produce a metal temperature in the gas turbine of about 1400.degree. F. or higher and wherein the hot gaseous combustion products employed to drive or operate said gas turbine contain a vanadium-containing compound and/or a sodium-containing compound which comprises providing in the hot gaseous combustion products employed to operate or drive said gas turbine at least 0.5 part by weight each of magnesium and chlorine for each part by weight vanadium in said hot gaseous combustion products and at least a total of 0.5 part by weight silicon and/or chromium for each part by weight sodium in said hot gaseous combustion products and providing in said hot gaseous combustion products an amount of SiO.sub.2 and MgO such that the parts by weight SiO.sub.2 relative to the parts by weight MgO in the hot gaseous combustion products is at least 1.
Dependencies are inferred from the claim text.