Kinetics according to ASTM

Evaluation PC specific heat conversion temperatures reaction enthalpy heat of conversions kinetics according to ASTM E 698-79... 

Fig. 3-49 Reaction Kinetics according to ASTM E 698-79 Pyrolysis of n-Hexacontane Atmosphere Argon, 5 cmVmin, 10 bar Heating Rates 5, 10, and 20 K/min Plot log P versus 1 000/r...

Table 3-17 Oxidation Kinetics according to ASTM E 698-79 of n-Alkanes, HD-Polyethylenes, Naphthenes, and Olefins Atmosphere Air Pressure 7 bar...

The investigation of pyrolysis kinetics according to ASTM E 698-79 using DSC in inert gas shows that there are two distinct maxima of the energy consumption for both the oil shale and the kerogen concentrate (Table 4-147). The activation energy and the frequency ... 

Table 4-203 Pyrolysis kinetics according to ASTM E 698-97, experiments with Simultaneous Thermal Analyzer.

The kinetic parameters computed according to ASTM E 698-79 from DTA data of the Simultaneous Thermal Analyzer are presented in Table 4-203 No. 1 and No. 2. 

Software only for the Simultaneous Thermal Analyzer STA 780 was available for kinetics according to Borchardt and Daniels. Similarly to the kinetics program according to ASTM E 698-79, only separately sampled DTA data can be processed using the Borchardt and Daniels program. The DTA data from simultaneous TGA/DTA experiments cannot be... 

The kinetic parameters for different conversion levels calculated according to ASTM E 698-79 using DuPont software may differ somewhat from those obtained using the... 

The Yerseley Mechanical Oscillograph supplied by ATS FAAR measures, according to ASTM D945 [142], the mechanical properties of rubber vulcanisations in the small range of deformation that characterises many technical applications. These properties include resilience, dynamic modulus, static modulus, kinetic energy, creep, and set under a given force. 

The application of thermoanalytical methods to the investigation of the kinetics of pyrolysis and oxidation processes of heavy petroleum components representing multi-component systems proved to be successful. Whereas the ASTM E 698-79 and the Flynn and Wall methods can be applied relatively uncritically, the interpretation of the data from the McCarty and Green method requires a solid knowledge of the thermal and oxidative behavior of the samples. The attempt to use the evaluation according to Borchardt and Daniels proved not to be successful for pyrolysis nor for oxidation reactions. Most of the... 

For investigation of the kinetics of p)Tolysis and oxidation reactions a Simultaneous Thermal Analyzer is preferred, provided that the incorporated software permits the evaluation according both to ASTME 689-79 and Flynn and Wall. In this way the kinetic parameters can be obtained and at the same time the peak maxima (minima) of the curves of energy against temperature can be examined to decide whether they really appear at equal conversion levels independent of the heating rates. All the requirements for the thermoanalysis of petroleum and its products would be fulfilled if such an instrument could... 

Corrosion kinetics of zirconium metal with different grain size ( normal means coarse grain size) (a) at 200°C (b) annealed Zr-0.2Nb alloy in water at 360°C using static autoclave according to the ASTM G2 method (c) zircaloy-4 alloy in steam at 400°C/10.5 MPa (d) at 500°C. 

Viscosity. It shall be detd in accordance with method 305.6 of Federal Test Method Std 791B (Jan 1969) (ASTM Method D445-65). The time is measured for a fixed vol of the liq to flow thru a calibtated Ubbelohde capillary viscometer under an accurately reproducible head and at a closely controlled temp. The kinetic viscosity is then calculated from the measured time flow and the calibration constant of the viscometer. Kinetic viscosity is a measure of the time for a fixed vol of liq to flow by gravity thru a capillary. It is usually expressed in centistokes, cSt, so that 1 St = 100 cSt. The dynamic viscosity is the product of kinematic viscosity density of the liq, both at same temp. The unit is poise, P, in g/cm/sec [For details see ASTM Standard, Part 17(1971), ppl78—83]... 

---