Release temperature

A comparison of results for fire effluents from full scale and small scale fire tests has to be done in steps. A full scale fire is a developing event where temperature and major constitutions changes continously. A small scale fire test either take one instant of that developing stage and try model that or try to model the development in a smaller scale. On a priority one level rate of heat release, temperature, oxygen concentrations and the ratio of C02/C0 concentrations have to be similar for a comparison. The full scale fire experiments reaches a temperature of 900 C at the moment of flashover, while the small scale fire tests are reaching temperatures just above 400 °C for NT-FIRE 004 and the cone experiments. For the DIN 53436-method the temperature was set to 400 °C. 

The current status of hydrogen storage in terms of gravimetric storage capacity and necessary-hydrogen release temperature range is shown in Figure 5. 

A 90% reduction in activation energy, not an unreasonable expectation for catalysts in general, reduces the peak temperature below 0 C. Clearly, only a small amount of catalytic action is required to make dramatic reductions in the release temperature. This implies that, with careful control of the invented process, it should be possible to dial-in the desorption temperature for hydrogen desorption. This allows us to assess how this hydrogen storage media can be applied. 

In most cases, each scenario will have a variety of conditions that need to be evaluated. These include the size of the release, orientation of release, temperature and pressure of operation, and weather conditions. 

Hydrocarbon fires are a principal concern in many processing facilities. There are many different types of hydrocarbon fires. The mode of burning depends on characteristics of the material released, temperature and pressure of the released material, ambient conditions, and time to ignition. Types of hydrocarbon fires include ... 

Hence the maximum air feed actual stoichiometry is a function of water vapor partial pressure corresponding to the air exhaust release temperature (pw) and the total pressure on the air cathode exhaust (ptotai)- Figure 2.8 shows the maximum air feed actual stoichiometry calculated from Equation 2.5, using water vapor partial pressure from the CRC Handbook of Chemistry and Physics [D.R. Lide (ed.), 72nd edn, 1991-92], as a function of air cathode exhaust release temperature. 

Figure 2.8 Maximum allowed air feed actual stoichiometry for a DMFC power system as a function of air cathode exhaust release temperature.

Q = Total gas rate of all valves, in dm3/s at one atmosphere and the release temperature Ujequ. = Equivalent vent exit velocity to be used in flame calc., in m/s... 

The acid esterifies the carbon-rich components at temperatures slightly above the acid release temperature. 

The heat release temperature 7 liax in K as the pyrolysis chamber temperature at which... 

The thermal combustion properties measured in the test are related to the flammability characteristics of the material.5155 For example, the heat release temperature from method A approximates the surface temperature at ignition (Section 14.3.2.1). The net calorific value from method B approximates the net heat of combustion measured in an oxygen bomb calorimeter. 

These classifications are based on the density difference between the released material and its surrounding medium (air). The classifications are influenced by release temperature, molecular weight, presence of aerosols, ambient temperature at release, and relative humidity. 

Material Tritium Retention Level Release Temperature ... 

Release temperatures are for vacuum unless otherwise stated... 

A direct comparison between porous carbon and porous silica supports is difficult since the measurement conditions are different. In the case of silica the hydrogen release temperature is lower but a possible chemical reaction between the silica and the LiB H4 has to be considered. It is interesting that the porous carbon support seems to suppress the formation of diborane. 

Energy released temperature increase X energy required to change by the reaction the temperature by 1°C... 

The high hydrogen release temperature, which must be brought down to a level closer to the waste heat temperature of the operating fuel cells. 

Hayatsu et al., 1980b). Very similar results were obtained on synthetic carbynes, made by catalytic disproportionation of CO. The tow release temperature shows that these molecules or radicals are present as such in the sample, and are held in place only by weak, adsorptive ( ) forces. Consequently, they may be released from the grains by the mechanisms discussed by Allen and Robinson (1977). 

Characteristics of asteroidal and cometary IDPs obtained from stratospheric collectors summary of measured He release temperatures, velocities and descriptive mineralogy. In Lunar Planet. Sci. XXXI, 1500. The Lunar and Planetary Institute, Houston (CD-ROM). 

Studied for their characteristics of high hydrogen content and low release temperatures [124—126]. Reversibility and kinetic of the hydrogen absorption/ desorption cycle are critical issues also for this class of compounds. NaAlH4 hydride can provide 5.5 wt% of hydrogen under reasonable conditions, by a decomposition reaction made reversible thank to the usage of a catalyst [127], while lithium alanate utilization appears not possible because of the irreversibility of the first decomposition step. 

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