Heat of Combustion (∆Hc)
This test method determines the heat of combustion of materials exposed to pressurized Gaseous Oxygen (GOX) in a bomb calorimeter. The heat of combustion of a material is the amount of energy released, per unit mass, when it is burned completely in oxygen and the combustion products are returned to essentially their original temperature. By thermodynamic convention, a change in heat content (∆H, enthalpy) is considered positive when heat is absorbed and negative when heat is released, as in a combustion reaction. The test is conducted by placing a pre-weighed sample inside a heavy stainless steel container, the bomb, filled with gaseous oxygen at about 3 MPa (30 atm) pressure. The bomb is placed inside a weighed container of water that is itself surrounded by a temperature-controlled water jacket and all are temperature equilibrated to maintain adiabatic conditions in the system. The sample is ignited by hot wire ignition and the energy release is measured based on calibrated thermocouple responses.
Most of our standard testing can be performed in 2-3 weeks and we also offer expedited testing services, if required.