| 1 kg of NOx removed by vehicle converter | LCI phase | TWC converter | 1/2 TWC converter |
| Materials and energy—input from techno sphere |
| ||
| Aluminized steel, gram | Production | 2 | 1 |
| Stainless steel, gram | Production | 20 | 10 |
| Canister manufacturing, gram | Production | 20 | 10 |
| Aluminum oxide—silica fibres (proxy for isolation), gram | Production | 1 | 0.5 |
| Kaolin, gram | Production, cordierite | 1.3 | 0.65 |
| Talc, gram | Production, cordierite | 2.4 | 1.2 |
| Aluminum oxide, gram | Production, cordierite | 0.7 | 0.35 |
| Aluminium hydroxide, gram | Production, cordierite | 1.1 | 0.55 |
| Silica, gram | Production, cordierite | 0.6 | 0.3 |
| Electricity, Wh | Production, cordierite | 9 | 4.5 |
| Aluminum oxide, gram | Production, wash coat | 0.10 | 0.05 |
| Cerium oxide, gram | Production, wash coat | 0.20 | 0.10 |
| Zirconium oxide, gram | Production, wash coat | 0.60 | 0.30 |
| Acetic acid, gram | Production, wash coat | 1* | 0.5* |
| Platinum (Pt), gram | Production, wash coat | 0.001 | 0 |
| Palladium (Pd), gram | Production, wash coat | 0.010 | 0 |
| Rhodium (Rh), gram | Production, wash coat | 0.001 | 0.001 |
| Emission to air |
| ||
| NOx, gram | Operation, FU | −1000 | −1000 |
| CO removed in converter, gram | Operation | −4600 | 0 |
| THC removed in converter, gram | Operation | −700 | 0 |
| CO2 from converted pollutants | Operation | 9400 | 0 |
| CO2 from additional fuel use | Operation | 8000 | 4000 |
| Waste |
| ||
| TWC unit to treatment: recycling and disposal, gram | End-of-life | 30 | 15 |