Though, hydrogen cannot be used as the solitary fuel in a CI engine, because the compression temperature is not enough to kick off combustion due to its elevated self-ignition temperature
In order to investigate the flammable properties of seven analyzed polyester materials, the following parameters were determined: combustion heat, the ignition temperature of volatile products of thermal decomposition, self-ignition temperature and oxygen indexes of the studied polyesters.
Therefore, the values of both the temperature of the ignition of the volatile products of thermal decomposition and self-ignition temperature, before and after modification are similar.
Flash point, Flammability, Flammability (Contact with water), Pyrophoric Properties, Explosive Properties, Auto-ignition Temperature , Relative Self-ignition Temperature
, Oxidising Properties, Stability in organic solvent, Dissociation constant, Viscosity and Granulometry.
More specifically, the air is first compressed, then fuel is injected into the cylinder as fuel contacts the heated air, it vaporizes and finally begins to burn as the self-ignition temperature
for ethanol and 'aquanol' (70% ethanol and 30% water) is greater than that of petrol.
If the heat reaches the self-ignition temperature
of the substance, it burns.
While using hydrogen in a compression ignition (CI) engine, the compression temperature is not enough to initiate the combustion due to its higher self-ignition temperature.
As the hydrogen self-ignition temperature is 858 K, compared to diesel of 453 K, it allows a larger compression ratio to be used for hydrogen in internal combustion engine (Lee and Kim, 2002).