, China); α-Al2O3 (α-Al2O3 Power for DTG Standard Material, Japan Shimadzu Corporation).
The measurements were made under fixed conditions of which was the constant heating rate of β (2
temperature range from 203 to 463 K for the first time, and the thermodynamic parameters such as entropy and enthalpy were also calculated. The accuracy of TMDSC was established by comparing the measured heat capacities of standard sapphire (α-Al2O3 ) with
for 3 h under a flow of 5 vol.% H 2 balanced with N 2 . The CSCR reaction conditions were as follows: catalyst loading = 0.45 g with a inert material of α-Al2O3 = 3.45 g, T = 850 °C, P = 1.0 MPa, CH 4 /CO 2 /H 2 O/N 2 molar ratio of 3/1.2/3/3 and
heat capacities of DPFEB were measured by TMDSC and the thermodynamic parameters such as entropy and enthalpy were also calculated. The accuracy of TMDSC was established by comparing the measured heat capacities of standard sapphire (α-Al2O3 ) with
capacity calibration was made by running a standard sapphire (α-Al2O3 ) at the experimental temperature. The calibration method was performed at the conditions as follows: (1) sampling interval: 1.00 s/pt; (2) equilibrate at 183.15 K; (3) isothermal for
the reliability of the adiabatic calorimeter, the molar heat capacities of a reference standard material, α-Al2O3 , were measured. The deviations of our experimental results from the recommended values of the National Bureau of Standards (NBS) [ 21
Heat capacity of standard sapphire (α-Al2O3 )
Heat capacity measurements were repeated three times unless stated elsewhere. The emphasis of this work is to assess the reproducibility and ensure accuracy of
differential thermal analysis (DTA) curves were obtained simultaneously with the same modulus on a TA Instruments SDT Q600 equipment under dynamic air atmosphere, flow 100 mL min −1 , from 35 to 1000 °C and heating rate of 20 °C min −1 , using α-Al2O3
Archer , DG . 1993 Thermodynamic properties of synthetic sapphire (α-Al2O–3-), standard reference material 720 and the effect of temperature-scale differences on thermodynamic properties . J Phys Chem Ref Data. 22
T ( t ) = T 0 + βt . The measurements started at the temperature T 0 = 30 °C. The measurements were carried out in a static air atmosphere. The α-Al2O3 was used as a reference material.
After obtaining α ( t ) and d α ( t )/d t