Patent ID: 9677763
Date: 2017-06-13
CPC Classifications: C10L,F23G,F23J,F23L,Y02E

Claim:
1. An oxycombustion process comprising: feeding to a combustor the following: a fuel selected from low ranking, gaseous, liquid, solid, or solid melting hydrocarbon fractions used as fuels, having a vanadium content in an amount by weight from 50 to 5,000 ppm or higher, and alkaline metals in amounts from 20 to 10,000 ppm, the hydrocarbon fractions being fed in admixture with water or steam, the amount of water or steam being at least 30% by weight with respect to the hydrocarbon fractions; and wherein magnesium is added as an oxide, or as a magnesium compound forming MgO in the combustion process, or mixtures thereof; and oxygen as an oxidant, having a titre higher than 80% by volume, the complement to 100% being formed of inert gases and/or nitrogen, being in admixture with either of the following: water or steam, the ratio by moles of oxidant:(water or steam) being between 1:0.4 and 1:3, or recycled flue gases having a water or steam amount higher than 30% by volume, the molar ratio of oxidant:(water or steam) in flue gases being comprised between 1:0.4 and 1:3, the recycled flue gases coming from the energy recovery equipment; the combustor being refractored, isotherm or quasi-isotherm, and flameless, operating at temperatures in the range of 1,250°-1,450° C. and under pressurized conditions.