The degeneration mechanism of lubricating oil in the ammonia fuel engine

Abstract

As a hydrogen-rich carbon-free fuel, ammonia has attracted great attention in the engine field. However, there are few studies on the lubricating oil of the ammonia engine, which hinders the development of the ammonia engine. To study the impact of ammonia on the physicochemical properties and the lubricating performances of the lubricating oil, water-lubricating oil, and lubricating oil-water-ammonia were prepared. By investigating dispersion stability, viscosity, thermal stability, and film-forming ability of different lubricating oils, the effect of ammonia on the physicochemical properties and lubricating properties of lubricating oil was analyzed. The effect mechanism of ammonia on the lubricating oil was also explored. This work can be a foundational contribution to the lubricating oil for the ammonia engine.