关键词: 固定床, 渣油加氢装置, 低黏度, 船用燃料, 调和组分, 加氢常压渣油, 反应温度, 液时体积空速

Abstract: In recent years, the main product of the fixed-bed residue hydrogenation unit, hydrogenated atmospheric residue, is often used as a blending component of low sulfur marine residual fuel. The blending component needs to undergo viscosity reduction treatment. The conversion formulas for the kinematic viscosity of feed and hydrogenated atmospheric residue at 50, 80, and 100°C are obtained by analyzing industrial data and experimental results. The influence of reaction conditions on product viscosity is explored. The decrease in volume viscosity of the protective agent and dematalization agent, desulfurizing agent, and carbon reduction catalyst is 0.97%, 0.86%, and 0.32%, respectively, with the combined contribution of the protective agent and dematalization agent reaching 54%. The adjustment of reaction temperature has the greatest impact on the viscosity of hydrogenated atmospheric residue, with an increase of 2.17 percentage points in the decrease of kinematic viscosity for every 5°C increase in reaction temperature. To produce low viscosity marine fuel blending components or products, the loading ratio of protective agents and dematalization agents should be increased compared to conventional catalyst gradation. The fixed-bed residue hydrogenation process can directly produce low sulfur marine fuel products by adding a vacuum distillation tower.

Key words: fixed-bed, residue hydrogenation unit, low viscosity, marine fuel, blending component, hydrogenation atmospheric residue, reaction temperature, liquid hourly space velocity