Prospects for use of {open_quotes}PDP{close_quotes} additive to improve the low-temperature properties of gas-condensate diesel

The increased interest in the development and application of fuel additives in our country can be attributed particularly to the increasingly severe requirements imposed on the performance and ecological characteristics of fuels. In Russia, where subfreezing temperatures for most of the year are the rule in the Far North, the problem of expanding the resources of low-pour grades of diesel fuel is extremely urgent. One of the possible ways to solve this problem is the production of winter-grade diesel fuels from gas condensates, for example, those produced from the Yamburg or Urengoi field, or blends of these condensates. At the Novo-Urengoi Gas Condensate Processing Plant, a wide-cut gas-condensate fuel designated GShZ is produced in conformance with Specification TU 51-28-86; this fuel is recommended for the operation of high-speed diesels at air temperatures of -30{degrees}C or higher in the temperate climatic zone and at -35{degrees}C or higher in the cold climatic zone. In view of this background, we undertook a study aimed at the use of the additive PDP to improve t{sub c} of GShZ fuel. The following materials were used in this study: samples of commercial gas-condensate diesel fuels from the Novo-Urengoi Gas Condensate Processing Plant, distillation data for whichmore » are given in Table 2; a blend of fractions of the gas-condensate diesel fuel; the still residue from the raw condensate; a commercial sample of the PDP pour depressant manufactured by the Naftan Production Association; and a laboratory sample of a modified PDP additive.« less