Case 4 --- GGU24

 

 

While the broadness of the pyrolysis profile of most kerogens is described well by a parallel reaction model, the pyrolysis profile at a constant heating rate for certain well-preserved algal kerogens is narrower than can be described by a single first-order reaction or a single nth-order reaction.  Pyrolysis data for GGU24, a well-preserved algal kerogen, is a prime example of this.  Its narrow pyrolysis profiles are fit well by a nucleation-growth model.

In this example, we use Pyromat data measured for GGU24 [Alan K. Burnham, Robert L. Braun, Thomas T. Coburn, Erik I. Sandvik, David J. Curry, Birthe J. Schmidt, and Rohinton A. Noble, An Appropriate Kinetic Model for Well-Preserved Algal Kerogens'', Energy & Fuels, Vol. 10, No. 1, pp. 49-59, 1996].

The files used in Case 4 for GGU24 can be downloaded as: ggu24.zip.  All included files are text files and should be extracted to a user data folder that is not a subfolder of C:\Program Files.

GGU24 Pyrolysis data

 

GGU2401.dat            Nominal heating rate of 1 C/min

GGU2406.dat            Nominal heating rate of 6 C/min

GGU2450.dat            Nominal heating rate of 50 C/min 

 

Single 1st-order reaction

 

GGU24-A.con            Command file

GGU24-A.out             Output file

GGU24-A.dup.out       Duplicate of output file

 

Single nth-order reaction

 

GGU24-B.con            Command file

GGU24-B.out             Output file

GGU24-B.dup.out       Duplicate of output file

 

Nucleation-Growth Model (3-parameter)

 

GGU24-C.con            Command file

GGU24-C.out             Output file

GGU24-C.dup.out       Duplicate of output file

 

Nucleation-Growth Model (4-parameter)

 

GGU24-D.con            Command file

GGU24-D.out             Output file

GGU24-D.dup.out       Duplicate of output file