Abstract
The purpose of research was to develop a catalyst for hydroisomerization of a hydrotreated straight-run diesel fraction, which allows one to obtain diesel fuels with improved low-temperature characteristics. The synthesized catalysts contained zirconia modified with tungstate anions, high silica zeolite, noble (Pt, Pd) or transient (Ni, Mo) metals, binding agents (alumina), and promoters. The samples were tested in the hydroisomerization at temperatures 250–360 °C, at a pressure of 3,0 MPa, feed space velocity of 1,5–3,0 h–1, and the ratio H2/feedstock of 1000 nm3/m3. The yield of the target product over samples GIC-1 (with Ni, Mo) and GIC-2 (with Pt, Pd) was 84,6 and 91,0 wt.%, respectively. The depression of the cloud point and of the cold filter plugging point in comparison with the feed was 20 °C for both samples. A possibility of producing the diesel fuel for cold climate zones according to GOST R 52368–2005 or the winter diesel fuel in accordance with TR CU 013/2011 is shown.
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