关键词: 加氢精制, 喷气燃料, 拓宽馏程, 贮存试验, 热氧化安定性, 破点, 沉淀量, 碱性氮

Abstract:

A new generation of low-pressure hydrogenation technology was adopted for hydrofining to expand the distillation range and increase the production of No. 3 jet fuel. The jet fuel product was subjected to a one-year storage test. A comparative analysis was conducted on the feedstocks before and after the adoption of the new technology. The results showed that the properties of the expanded feedstocks decreased compared to the original process, with little change in hydrocarbon composition. The density, sulfur content and nitrogen content increased significantly while its smoke point went down and its naphthalene-hydrocarbon content increased twice, and its freezing point rising from-59.9 ℃ to-51.0 ℃, but the product was still qualified No.3 jet fuel. The properties of the new product and the product after storage for 1 a were fully analyzed and compared according to the No. 3 jet fuel product standard. At the same time, the key items such as dynamic thermal oxidation stability breaking point and static thermal oxidation stability precipitation were compared and analyzed. The results showed that the results of full analysis items changed slightly during the storage of jet fuel with extended distillation range, but they were still qualified. The breaking point of dynamic thermal oxidation stability was greater than 300 ℃, the static oxidation precipitation was not greater than 0.5 mg/100 mL, and the mass fraction of basic nitrogen was less than 1 μg/g. The key indicators were better than the requirements of the No.3 jet fuel standard, and the product yield increased by 47.7% compared to before expanding the distillation range.

Key words: hydrofining, jet fuel, extended distillation range, storage test, thermal oxidation stability, break point, sedimentation amount, basic nitrogen