Table 1: Parameters of the models: diffusion approximation, two term exponential, Henderson and Pabis, logarithmic and Page, coefficient of determination (R2) and mean square deviation (MSD) for the drying of guava pulp processing residue at 45, 50, 55, 60, 65 and 70 °C.
|
Diffusion aproximation |
|||||
|
|
a |
k |
B |
R2 (decimal) |
MSD |
|
45 |
0.00315 |
0.107893 |
0.134411 |
0.9991 |
0.011 |
|
50 |
-0.02322 |
1.119691 |
0.012708 |
0.9955 |
0.026 |
|
55 |
0.00272 |
0.248668 |
0.060365 |
0.9979 |
0.018 |
|
60 |
0.08126 |
0.245399 |
0.061820 |
0.9995 |
0.008 |
|
65 |
-130.875 |
0.023288 |
0.997606 |
0.9913 |
0.011 |
|
70 |
-0.00492 |
0.768696 |
0.025576 |
0.9914 |
0.011 |
Two-term exponential
|
|
a |
K |
R2 (decimal) |
MSD |
|
45 |
1.0000 |
0.014545 |
0.9991 |
0.011 |
|
50 |
0.0048 |
2.872565 |
0.9952 |
0.027 |
|
55 |
0.0077 |
1.927482 |
0.9979 |
0.018 |
|
60 |
0.0835 |
0.181095 |
0.9949 |
0.008 |
|
65 |
0.0052 |
3.356372 |
0.9986 |
0.014 |
|
70 |
0.0034 |
5.672267 |
0.9969 |
0.023 |
Henderson and Pabis
|
|
a |
K |
R2 |
MSD |
|
45 |
0.10928 |
-2.36567 |
0.9376 |
0.093 |
|
50 |
0.17277 |
-45.1983 |
0.6905 |
0.298 |
|
55 |
0.99855 |
0.015029 |
0.9985 |
0.018 |
|
60 |
0.95865 |
0.015777 |
0.9987 |
0.013 |
|
65 |
1.00798 |
0.017625 |
0.9987 |
0.014 |
|
70 |
1.02696 |
0.01999 |
0.9974 |
0.021 |
Logarithmic
|
|
a |
k |
c |
R2 (decimal) |
MSD |
|
45 |
1.006174 |
0.0138 |
-0.015438 |
0.9995 |
0.008 |
|
50 |
1.017238 |
0.0136 |
-0.011265 |
0.9953 |
0.026 |
|
55 |
1.001110 |
0.0137 |
-0.028462 |
0.9990 |
0.012 |
|
60 |
0.960831 |
0.0154 |
-0.006084 |
0.9988 |
0.013 |
|
65 |
1.015021 |
0.0166 |
-0.017076 |
0.9993 |
0.010 |
|
70 |
1.056659 |
0.0175 |
-0.048354 |
0.9987 |
0.015 |
Page
|
|
n |
k |
R2 |
MSD |
|
45 |
1.010566 |
0.013873 |
0.9917 |
0.010 |
|
50 |
1.013976 |
0.01306 |
0.9953 |
0.026 |
|
55 |
1.027929 |
0.013288 |
0.9980 |
0.017 |
|
60 |
0.918992 |
0.023463 |
0.9978 |
0.017 |
|
65 |
1.052065 |
0.013980 |
0.9990 |
0.012 |
|
70 |
1.082752 |
0.013831 |
0.9979 |
0.019 |