Aqueous metal colloid combustion additive
The present invention relates to a combustion additive comprising a colloidal solution containing dispersed fine metal particles. The present invention also relates to a method for producing the colloid. More particularly the present teaching relates to a combustion additive having a colloid, wherein the colloid comprises metal particles providing in an alkaline aqueous solution, the metal particles being dispersed within that solution and having an average diameter in the range of 30 nm to 30 μm. The colloid can partly/fully substitute water of a water injection system or used as an air humidification component for combustion.
1. A combustion additive aqueous colloidal solution having:
a pH of 8.0 to 12.5,
a Total Dissolved Solid, TDS, value in the range of 1500 to 3500 ppm,
an average particle size of 30 nm to 30 μm,
a sodium constituent having a concentration of 1500 to 3000 mg/L, and
at least one of Aluminum (Al), Chromium (Cr), Iron (Fe), and Nickel (Ni) constituents having a total concentration of 0.5 to 200 mg/L.
2. The combustion additive colloidal solution of claim 1 having, when measured at 20° C.:
a DC conductivity of 5 to 13 mS/cm and
a surface tension of 50 to 70 mN/m.
3. The combustion additive colloidal solution of claim 1 further comprising an ammonia/ammonium constituent having a concentration of 3 to 10 mg/L at 20° C.
4. A combustion additive mixture comprising the colloidal solution of claim 1 mixed with at least one of:
water;
water miscible solvents;
hydrogen peroxide; or
sodium percarbonate.