Chemical Percolation Devolatilization (CPD) Model

Notice: A small mistake was found in the table look-up routine (9-16-2004). This has now been corrected in all versions of the code on this page. You can replace the "inverf" subroutine in your code to make the update.

- Brief Description

- CPD Summary Document

- Code Availability new

- Correlation of 13-C NMR Data (write-up) (6-30-98)

- Correlation for NMR Parameters for CPD Model (online calculator) (Excel file) (5-31-06 )

Chemical Percolation Devolatilization (CPD) Nitrogen and Light Gas (NLG) Model

A modified verion of the CPD model has been completed that calculates nitrogen release in the tar and light gas, and also the amount of nitrogen remaining in the char. This model was developed by Dominic Genetti (MS, BYU, 1999). In addition, this model uses a correlation to calculate the mass fraction of major light gas species in the light gas fraction as a function of time, using a table look-up procedure. Thus, the computational eficiency of the CPD model is maintained, and the number of ODE's solved in the code is minimized.

- Users Manual for latest CPD model, including the nitrogen release model and the model to calculate the species concentrations in the light gases (PDF file)

- Files for new CPD model, including nitrogen release and gas species (Directory of Files)

- Files for newest CPDCP model, including nitrogen release and gas species and a pressure-dependent swelling correlation (Directory of Files) (9-9-2011)

- Dominic Genetti's M.S. Thesis, BYU, 1999, "An Advanced Model of Coal Devolatilization Based on Chemical Structure," (PDF file - 720K)

- Biomass pyrolysis using CPD (notes from Aaron Lewis, September, 2013)

I am trying to generate a user database for the CPD model. If you would like free updates on improvements to the CPD model and related correlations, please send me an email: tom_fletcher@byu.edu.