What kind of soot is generated by a fire?
What kind of soot is generated by a fire?
Soot generated within flames consists essentially of aggregates of spheres of carbon. Soot found in domestic fireplace chimneys contains few aggregates but may contain substantial amounts of particulate fragments of coke or char. Soot from diesel engines consists essentially of aggregates together with tars and resins.
Where does the production of soot take place?
Soot production takes place at high temperatures, above 1000 °C, during the fossil fuel combustion or during the flaming stage of biomass burning. Figure 1. Morphology of freshly produced soot, showing a characteristic chain-like structure of nanometer-size soot particles.
How is the carbon content of soot determined?
A mature soot particle is typically composed of a stack of layers, each of them having a graphite-like hexagonal structure. Not all layers are arranged in a parallel fashion. In addition to carbon, soot contains remnants of other elements present in the original fuel. A typical carbon content of soot is between 90 and 98%.
Which is the most destructive contaminant in engine oil?
Water is one of the most destructive contaminants in most all lubricants. It attacks additives, induces base oil oxidation and interferes with oil film production. Low levels of water contamination are normal in engine oils.
Who is most at risk for exposure to soot?
Individuals with existing health issues are at the greatest risk from toxic soot compounds. Compromised immune systems, respiratory problems and heart conditions can all be impacted by exposure to soot. When you’re recovering from a home fire, you want to know as much as possible about the restoration process.
How does exposure to soot affect your health?
Common reactions to soot range from watery eyes and a runny nose to a persistent cough. Individuals with existing health issues are at the greatest risk from toxic soot compounds. Compromised immune systems, respiratory problems and heart conditions can all be impacted by exposure to soot.
What happens to dispersancy when soot is high?
Also, when dispersancy is effective but soot load is high, other contaminants like water and glycol can quickly knock out dispersancy performance without an increase in soot load. When soot loads are high, this sudden loss of dispersancy leads to rapid agglomeration and deposition of soot onto machine surfaces.
Is the soot in diesel engines good for the environment?
The U.S. Environmental Protection Agency (EPA) continues to adopt and enforce more rigorous nitro-oxidation (NOx) and hydrocarbon emission policies for heavy-duty diesel engines used in trucks and buses. New environmental policies fueling ever-increasing engine soot loads spell good news for the environment, but bad news for lubricants.
