Table 3.
Calculated kinetic parameters (reaction rate constant and activation energies) for glucose, mannose and galactose conversion in three different reaction medium. * Refers to the values calculated from [18].
|
Calculated reaction rate constants at 175 °C and activation energies in hot liquid water [min−1, kJ mol−1] |
Calculated reaction rate constants at 175 °C and activation energies in sulfuric acid [L mol−1 min−1, kJ mol−1] |
Calculated reaction rate constants at 130 °C and activation energies in formic acid [L mol−1 min−1, kJ mol−1] |
|||||||
|---|---|---|---|---|---|---|---|---|---|
|
Glucose* |
Mannose |
Galactose |
Glucose |
Mannose |
Galactose |
Glucose |
Mannose |
Galactose |
|
|
k1 |
1.4×10−3 |
1.8×10−3 |
1.0×10−3 |
1.9×10−1 |
1.4×10−1 |
1.4×10−1 |
1.3×10−2 |
1.8×10−2 |
1.6×10−2 |
|
Ea1 |
85 |
117 |
125 |
158 |
148 |
173 |
139 |
143 |
145 |
|
k2 |
3.6× 10−3 |
3.6× 10−3 * |
3.6× 10−3 * |
5.4×10−1 |
5.4×10−1 |
5.4×10−1 |
6.5×10−2 |
6.5×10−2 |
6.5×10−2 |
|
Ea2 |
106 |
106 |
106 |
107 |
107 |
107 |
91 |
91 |
91 |
|
k3 |
2.9×10−7 |
6.0×10−7 |
5.6×10−8 |
6.0×10−3 |
3.2×10−2 |
1.7×10−2 |
4.5×10−3 |
1.3×10−3 |
2.1×10−3 |
|
Ea3 |
78 |
48 |
101 |
62 |
107 |
61 |
106 |
119 |
102 |
|
k4 |
1.2×10−3 |
4.5×10−3 |
3.0×10−3 |
4.6×10−2 |
2.7×10−1 |
1.0×10−1 |
/ |
/ |
/ |
|
Ea4 |
98 |
163 |
147 |
174 |
169 |
167 |
|||
|
k4r |
1.4×10−3 |
2.3×10−3 |
3.5×10−2 |
5.1×10−1 |
1.7×10−3 |
2.7×10−2 |
/ |
/ |
/ |
|
Ea4r |
120 |
153 |
140 |
93 |
27 |
47 |
|||
|
k5 |
1.2× 10−2 |
1.2× 10−2 |
2.5× 10−2 |
2.5 |
2.5 |
1.3 |
/ |
/ |
/ |
|
Ea5 |
139 |
139 |
103 |
31 |
31 |
78 |
|||
|
k6 |
1.3× 10−3 |
1.3× 10−3 * |
1.0×10−2 |
3.8×10−2 |
3.8×10−2 |
1.7×10−2 |
/ |
/ |
/ |
|
Ea6 |
108 |
108 * |
55 |
32 |
32 |
70 |
|||
|
k7 |
/ |
/ |
/ |
1.2 |
1.2 |
1.2 |
7.6×10−2 |
7.6×10−2 |
7.6×10−2 |
|
Ea7 |
86 |
86 |
86 |
91 |
91 |
91 |
|||
|
k8 |
/ |
/ |
/ |
3.6× 10−2 |
6.3×10−1 |
9.3×10−2 |
1.6×10−1 |
7.2×10−1 |
1.7×10−1 |
|
Ea8 |
66 |
76 |
83 |
40 |
78 |
87 |
|||
|
k8r |
/ |
/ |
/ |
2.2 |
6.2 |
1.8 |
3.9 |
11.5 |
4.2 |
|
Ea8r |
35 |
43 |
83 |
36 |
46 |
70 |
|||
|
k9 |
/ |
/ |
/ |
/ |
/ |
/ |
2.2×10−1 |
/ |
3.1×10−1 |
|
Ea9 |
35 |
50 |
|||||||
|
k9r |
/ |
/ |
/ |
/ |
/ |
/ |
6.2 |
/ |
3.3 |
|
Ea9r |
36 |
41 |
|||||||