Study on Microstructure and Combustion-explosion Properties of Micro-emulsified Diesel with Different Cosurfactants

The microstructure and size distribution of water-in-oil (W/O) particles of micro-emulsified diesel (MED) with different cosurfactants were measured by High Resolution Transmission Electron Microscopy (HRTEM) and Nano-Laser Particle Size Analyzer (NLPSA). The combustion and explosion performance of MED with different cosurfactants were measured by the sustainable combustion performance testing device and explosion performance testing device for liquid fuel. The results show that the average particle size of MED which uses octanol as cosurfactant is smallest as 16.1 nm and has good size distribution uniformity. Flash point of MED is slightly higher only when using octanol as it's cosurfactant. The fire resistant abilities order of different MED is that octanol > decanol > hexanol > pentanol >n-heptanol. Comparing with -No.-10 diesel, the maximum explosion pressure and pressure rise rate after MED decreased by 0.09 MPa and 1.34 MPa/s, respectively.