The newest results on the improvement of the slurry, essentially increasing its energetic by the doping of aluminum microparticles is reported. We have prepared the initial pure coal-water slurries mixed with waste petrochemicals (CWSP) composition consisting of 89 wt % filter cake of fiery coal, 10 wt % waste fuel oil, and 1 wt % plasticizer. The final slurry was doped by aluminum powder with an average particle size of up to 10 μm, which is a typical waste of metal processing. The used weight concentrations of the aluminum powder were in the range of 2-5%. The fuel droplet (1) was fixed onto the junction of the fast K-type thermocouple and introduced into the heat-resistant glass pipe (2) with high-temperature air flow. This setup allows for the measurements of the combustion temperatures for different temperatures of an air flow around the fuel sample and, therefore, gives the way to determine the best conditions for fuel burning. The initial CWSP composition demonstrates the slow increase of the combustion heat with the air flow temperature. It does not exceed 750°C, and following growth of the air flow temperature after this value leads only to a proportional growth of the measured temperature inside the burning fuel droplet. An addition of 2 wt % aluminum powder leads to evident stabilization of the combustion temperature at the value that is maximally possible for initial CWSP composition. Therefore, we can see the effective stabilization of the fuel combustion heat in a relatively wide range of the external conditions.
ASJC Scopus subject areas
- Chemical Engineering(all)
- Fuel Technology
- Energy Engineering and Power Technology