| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| calorific value of hydrogen vs natural gas | 0.59 | 1 | 6992 | 86 |
| calorific value of hydrogen gas | 0.7 | 0.9 | 7361 | 24 |
| energy content of hydrogen vs natural gas | 1.97 | 0.4 | 8110 | 25 |
| calorific value of hydrogen gas in kcal/kg | 0.9 | 0.2 | 958 | 42 |
| calorific value of hydrogen fuel | 1.18 | 0.6 | 309 | 24 |
| cost of hydrogen vs natural gas | 0.96 | 0.3 | 2258 | 65 |
| natural gas vs hydrogen | 1.66 | 0.2 | 7234 | 22 |
| calorific value of hydrogen | 0.96 | 0.7 | 2708 | 19 |
| energy density of hydrogen vs natural gas | 0.94 | 0.2 | 9305 | 56 |
| calorific value of natural gas | 0.84 | 0.2 | 1118 | 100 |
| gross calorific value of natural gas | 0.5 | 0.1 | 8829 | 42 |
| hydrogen vs natural gas efficiency | 1.73 | 0.7 | 934 | 96 |
| difference between natural gas and hydrogen | 0.69 | 0.1 | 6247 | 44 |
| calorific value of liquid hydrogen | 0.86 | 0.8 | 2865 | 43 |
