Apparatus for determining high pressure coal‐hydrogen reaction kinetics under rapid heating conditions

1974 ◽  
Vol 45 (8) ◽  
pp. 992-995 ◽  
Author(s):  
D. B. Anthony ◽  
J. B. Howard ◽  
H. P. Meissner ◽  
H. C. Hottel
Keyword(s):  
High Pressure ◽  
Reaction Kinetics ◽  
Rapid Heating

scholarly journals Reaction Kinetics of Coal Hydrogenation under High Pressure

1965 ◽  
Vol 29 (12) ◽  
pp. 988-994,a1 ◽  
Author(s):  
Tadao Ishii ◽  
Yousuke Maekawa ◽  
Gen Takeya
Keyword(s):  
High Pressure ◽  
Reaction Kinetics ◽  
Kinetics Of

High-Pressure Reaction Kinetics of Hydrogen Sulfide and Uncalcined Limestone Powder

1999 ◽  
Vol 38 (10) ◽  
pp. 3802-3811 ◽  
Author(s):  
Rajeev Agnihotri ◽  
Shriniwas S. Chauk ◽  
Santhosh K. Misro ◽  
Liang-Shih Fan
Keyword(s):  
High Pressure ◽  
Hydrogen Sulfide ◽  
Reaction Kinetics ◽  
Limestone Powder ◽  
High Pressure Reaction ◽  
Kinetics Of

Studies of Reaction Kinetics of Catalytic Hydrogenation of Isophthalonitrile for Meta-Xylenediamine Preparation

2015 ◽  
Vol 1088 ◽  
pp. 348-352
Author(s):  
Yu Gang Li ◽  
Ling Qi Kong
Keyword(s):  
High Pressure ◽  
Reaction Kinetics ◽  
Nickel Catalyst ◽  
Catalytic Hydrogenation ◽  
Response Speed ◽  
Kinetics Equation ◽  
Reaction Pressure ◽  
Raney Nickel Catalyst ◽  
Hydrogenation Reactor ◽  
Kinetics Of

With Raney nickel catalyst and aniline solvent, the reaction kinetics of catalytic hydrogenation of isophthalonitrile (IPN) for meta-xylenediamine (MXDA) preparation is studied in this paper. The experiment is conducted in a 1L büchiglas high-pressure hydrogenation reactor under the condition of the reaction temperature (100°C) and the reaction pressure (35 bar). The results shows that the kinetics equation proposed in this paper can be used to predict the response speed of IPN accurately.

scholarly journals Unimolecular Reaction Kinetics in the High-Pressure Limit without Collisions

1996 ◽  
Vol 118 (43) ◽  
pp. 10640-10644 ◽  
Author(s):  
William D. Price ◽  
Paul D. Schnier ◽  
Rebecca A. Jockusch ◽  
Eric F. Strittmatter ◽  
Evan R. Williams
Keyword(s):  
High Pressure ◽  
Reaction Kinetics ◽  
Unimolecular Reaction ◽  
Pressure Limit

scholarly journals Influence of Pyrolysis Gas on Volatile Yield and CO2 Reaction Kinetics of the Char Samples Generated in a High-Pressure, High-Temperature Flow Reactor

Energies ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 107 ◽  
Author(s):  
Vijayaragavan Krishnamoorthy ◽  
Yaw Yeboah ◽  
Sarma Pisupati
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Reaction Kinetics ◽  
Flow Reactor ◽  
Structural Characteristics ◽  
Exponential Factor ◽  
Volatile Yield ◽  
High Pressure High Temperature ◽  
N2 Atmosphere ◽  
Significant Difference

The influence of pyrolysis atmosphere on volatile yield, structural characteristics, and CO2 reaction kinetics have been examined on chars generated from Pittsburgh No. 8 coal at 6.2 bar pressure and 1100 °C in a high-pressure, high-temperature flow reactor (HPHTFR) in Ar, N2, 50 (vol. %) CO2 and N2 (i.e., CO2/ N2) atmospheres. The chars were characterized for volatile yield, thermal swelling ratio, surface area, pore size distribution, crystallite structure, defects to graphitic intensity ratio, and char-CO2 reactivity. Coal pyrolyzed in CO2/N2 showed higher volatile yield (27%) compared to coal pyrolyzed in argon (~16%) and nitrogen (~19%). Except for volatile yield, there was no significant difference in structural properties for chars generated in different pyrolysis atmospheres. The difference in volatile yield was found to be due to presence of unconverted tetrahydrofuran (THF) soluble tar/soot. The results also showed that the intrinsic reactivity was highest for char generated in N2 atmosphere and lowest for char generated in CO2/N2 atmosphere. The kinetic parameters (activation energy and pre-exponential factor) for the char-CO2 reaction were ascertained using nth order model. The activation energies did not differ significantly among the chars generated in different pyrolysis atmospheres. The order of reaction was found to follow: CO2/N2 char > N2 char ≈ Ar char.

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