VANADIUM CORROSION INHIBITORS IN GAS TURBINE APPLICATIONS
The present embodiments describe a method to reduce vanadium corrosion in a gas turbine by adding an oleophilic corrosion inhibitor into a combustion fuel, in which the oleophilic corrosion inhibitor comprises carbon black support particles and magnesium bonded to the carbon black support particles. The carbon black support particles comprise a particle size less than 40 nanometer (nm), and oxygen content less than 1 weight percent (wt %), and a surface area of at least 50 square meters per gram (m 2 /gram).
1 . A method of reducing vanadium corrosion in a gas turbine comprising:
adding an oleophilic corrosion inhibitor into a combustion fuel, in which the oleophilic corrosion inhibitor comprises carbon black support particles and magnesium attached to the carbon black support particles, in which
the carbon black support particles comprise a particles size less than 40 nm, an oxygen content less than 1% by weight, and a surface area of at least 50 m 2 /gram.
2 . The method of reducing vanadium corrosion in a gas turbine of claim 1 , in which the magnesium is magnesium oxide.
3 . The method of reducing vanadium corrosion in a gas turbine ac of claim 1 , in which the magnesium comprises 0.05 to 20 weight percent magnesium oxide.
4 . The method of reducing vanadium corrosion in a gas turbine of claim 1 , in which the combustion fuel comprises liquid oil.
5 . The method of reducing vanadium corrosion in a gas turbine of claim 1 , in which the carbon black is acetylene black.
6 . The method of reducing vanadium corrosion in a gas turbine of claim 1 , in which the particle size of the carbon black support is less than 20 nm.
7 . The method of reducing vanadium corrosion in a gas turbine of claim 1 , in which the oxygen content of the carbon black support particles is less than 1.0 weight percent.
8 . The method of reducing vanadium corrosion in a gas turbine of claim 1 , in which the ash content of the carbon black support particles is less than 0.5 weight percent.
9 . The method of reducing vanadium corrosion in a gas turbine of claim 1 , further comprising mixing the oleophilic support and the corrosion inhibitor.
10 . The method of reducing vanadium corrosion in a gas turbine of claim 1 , further comprising mixing the oleophilic corrosion inhibitor with liquid fuel solvent.
11 . The method of reducing vanadium corrosion in a gas turbine of claim 1 , in which the surface area of the carbon black support particles is from 50 m 2 /grams to 100 m 2 /gram.
12 . The method of reducing vanadium corrosion in a gas turbine of claim 1 , in which the oleophilic corrosion inhibitor is added in an amount such that the amount of magnesium oxide is in excess of the vanadium.
13 . A method of making the vanadium corrosion inhibitor comprising:
oxidizing carbon black particles;
mixing the oxidized carbon black with a magnesium salt solution;
drying the mixture to yield a dried mixture of oxidized carbon black and magnesium salt;
calcining the dried mixture to produce the vanadium corrosion inhibitor under flowing inert gas such as nitrogen, helium and argon, the vanadium corrosion inhibitor comprising magnesium oxide attached to the carbon black support particles, in which the carbon black support particles comprise a particles size less than 40 nm, an oxygen content less than 1 weight percent, an ash content less than 0.5 weight percent, and a surface area greater than 50 m 2 /gram.
14 . The method of making the vanadium corrosion inhibitor of claim 13 , in which oxidation of the carbon black support particles involves heating in an oxidizing atmosphere.
15 . The method of making the vanadium corrosion inhibitor of claim 13 , in which oxidation of the carbon black support particles involves immersing the carbon black support particles in an oxidizing solution.
16 . The method of making the vanadium corrosion inhibitor of claim 13 , in which the magnesium salt solution comprising water and a magnesium salt chosen from magnesium chloride, magnesium nitrate haxahydrate, or magnesium sulfate.
17 . An oleophilic corrosion inhibitor comprising oleophilic carbon black support particles and magnesium bonded to the carbon support particles, in which:
the carbon black support particles comprise a particle size less than 40 nm, an oxygen content less than 1 weight percent, an ash content less than 0.5 weight percent, and a surface area of at least 50 m 2 /gram; and
the magnesium includes magnesium oxide, elemental magnesium, or combinations thereof, in which the magnesium includes at least 20 weight percent magnesium oxide.
18 . The oleophilic corrosion inhibitor of claim 17 , in which the oleophilic corrosion inhibitor comprises 0.05 to 20 weight percent magnesium oxide.