| Share | Phrase |
|---|
| 53.35% | carbonaceous [physical/chemical] fuel |
| 11.25% | carbonaceous [physical/chemical] material |
| 10.67% | carbonaceous [physical/chemical] deposit |
| 8.00% | carbonaceous [physical/chemical] matter |
| 6.37% | carbonaceous [physical/chemical] mixture |
| 4.69% | carbonaceous [physical/chemical] residue |
| 3.06% | carbonaceous [physical/chemical] emission |
| 2.56% | carbonaceous [physical/chemical] component |