Naphthalene type polymers as solid hydrogen transfer agents (shta), combined with hydrotreating catalysts to obtain ultra low sulfur diesel (ulsd)

A process for obtaining ultra-low sulfur diesel (ULSD) with a combined bed formed by a ULSD or non-ULSD hydrodesulfurization (HDS) catalyst and solid hydrogen transfer agent (SHTA), wherein the process comprises the following steps:

• a) packing a fixed bed reactor of an HDS pilot plant with a combined bed formed by an ULSD or non-ULSD HDS catalyst and the preactivated SHTA, wherein the ratio comprises 10-90% volume of the catalyst and 10-90% volume of the SHTA with variable setting of the beds;
• b) simultaneous activation of the combined bed formed by an ULSD or non-ULSD HDS catalyst and the preactivated SHTA by any method used in the activation of HDS catalysts;
• and
• c) evaluation of the HDS activity of the previously activated combined bed, using cuts and/or fractions of the oil as feed, and/or a blends thereof selected from the group consisting of naphtha, straight run gas oils (SRGO), kerosine, jet fuel, and gasoline, wherein the reaction is carried out in the presence of a reducing agent selected from the group consisting of hydrogen, methane, and natural gas, at a temperature between 300 and 450° C., pressure of 20 to 70 Kg/cm2, liquid hourly space velocity (LHSV) between 0.5 and 2 h−1 for carrying out the HDS reaction and obtaining ULSD.