Catalysts and selective process for the production of renewable aviation fuels and biofuel produced

A selection process for production of renewable aviation fuels, the process comprising:

• selecting a renewable feedstock of a first stage from among vegetable oils, animal fats, residual edible oils, or acids;
• hydrodeoxygenating and polymerizing the renewable feedstock in a first stage, with formation of hydrocarbons with longer carbon chains than those present in the renewable feedstock;
• directing effluent from the first stage, containing n-paraffins, olefins and aromatics and free of organosulfurates, to a second stage of reaction, without purification to eliminate contaminants;
• hydroisomerizing and hydrocracking within second stage with multiple catalytic beds, for hydroisomerization and hydrocracking reactions, whose catalysts have different chemical and physical characteristics;
• and
• sending recycle gas, rich in hydrogen, from the second stage to the first stage, without treatment in amine units to remove contaminants,
• wherein the catalytic beds of the second stage show gradation of activity,
• wherein operating conditions of the second stage are:
• pressure in a range of 3 MPa to 8 MPa, average temperature of the catalytic bed between 240° C. and 380° C. and hydrogen/feedstock ratio between 100 and 600 NL H2/L of feedstock, and
• wherein the operating conditions of the second stage may be the same or different from those of the first stage.