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Table 4
Step-by-step reactions and rate-limiting steps for the AM3 model atmosphere at a temperature of 3500 (K) and a gas density of 10−9 (gcm−3).
| Pathway | Step | Reactants | Products | Timescale (s) | |
|---|---|---|---|---|---|
| C → CO | |||||
| Pathway 1 | 1. | C + OH | → | CO + H | 7.43 × 10−5 |
| Total: | 7.43 × 10−5 | ||||
| Pathway 2 | 1. | C + OH | → | CH + O | 4.10 × 10−3 |
| 2. | CH + O | → | CO + H | 4.27 × 10−4 | |
| Total: | 4.53 × 10−3 | ||||
| Pathway 3 | 1. | C + NO | → | CN + O | 1.44 × 101 |
| 2. | CN + O | → | CO + N | 6.46 × 10−3 | |
| Total: | 1.44 × 101 | ||||
| O → CO | |||||
| Pathway 1 | 1. | CH + O | → | CO + H | 4.27 × 10−4 |
| Total: | 4.27 × 10−4 | ||||
| Pathway 2 | 1. | CH + O | → | C + OH | 2.63 × 10−3 |
| 2. | C + OH | → | CO + H | 7.43 × 10−5 | |
| Total: | 2.70 × 10−3 | ||||
| Pathway 3 | 1. | O + C2 | → | C + CO | 6.72 × 100 |
| Total: | 6.72 × 100 | ||||
| CO → C | |||||
| Pathway 1 | 1. | CO + H | → | C + OH | 6.26 × 10−5 |
| Total: | 6.26 × 10−5 | ||||
| Pathway 2 | 1. | CO + H | → | C+O+H | 5.27 × 10−1 |
| Total: | 5.27 × 10−1 | ||||
| Pathway 3 | 1. | CO + M | → | C+O+M | 5.24 × 100 |
| Total: | 5.24 × 100 | ||||
| CO → O | |||||
| Pathway 1 | 1. | CO + H | → | C + OH | 6.26 × 10−5 |
| 2. | C + OH | → | CH + H | 4.10 × 10−3 | |
| Total: | 4.16 × 10−3 | ||||
| Pathway 2 | 1. | CO + H | → | C+O+H | 5.27 × 10−1 |
| Total: | 5.27 × 10−1 | ||||
| Pathway 3 | 1. | CO + C | → | C2 + O | 3.24 × 101 |
| Total: | 3.24 × 101 | ||||
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