https://doi.org/10.3390/en12132504
“At this stage, considering all aspects, like energy consumption, price, stability, environment pollution, and so on, MEA may not be the best but the most mature solvent, which is used as a benchmark solvent in the CCS field. Single MEA and amine blend solvent remain the best choices for the short and medium term with a tight competition [6]. However, there is a significant difference in the energy consumption in these pilot plants or at a higher scale. From Figure 1, even in similar flue gas conditions (CO2 concentration from 9% to 15%), the energy consumption ranges from 2.8 GJ/t CO2 to 7.7 GJ/t CO2, with the details shown in Table 2. This result appeared not only due to the different absorption solvents and facility, but also the different operating conditions and evaluation methods. Thus, this situation indicates that there is room for amine-based absorption to improve the energy efficiency and to lower the cost of CCS.”
| Solvent | Energy Consumption (GJ/t) | Temperature of Flue Gas (°C) | CO2 Concentration of Flue Gas (%) | Ref |
|---|---|---|---|---|
| MEA | 3.5 | 40 | 12 | [50] |
| MEA | 3.82 | 127.5 | 13.5 | [51] |
| MEA | 7.7 | 40 | 13.14 | [52] |
| MEA | 3.8 | 90 | 13.5 | [53] |
| MEA | 3.53 | 60 | 13 | [54] |
| CESAR1 | 2.9 | 60 | 13 | [54] |
| CESAR2 | 3.46 | 60 | 13 | [54] |
| MEA | 3.62 | 47 | 12 | [55] |
| CASTOR1 | 3.58 | 47 | 12 | [55] |
| CASTOR2 | 3.80 | 47 | 12 | [55] |
| MEA | 3.48 | 40 | 14.2 | [56] |
| GUSTAV200 | 2.77 | 40 | 14.2 | [56] |
| MEA | 5.6 | 51 | 9.0 | [57] |
| MEA | 4.8 | 51 | 12 | [57] |
| MEA | 4.5 | 51 | 13.5 | [57] |
| MEA | 3.8 | 47 | 14 | [58] |
| MEA | 4.1 | 40 | 15 | [59] |
| SOLVENTA | 3.1 | 40 | 15 | [59] |
| SOLVENTB | 2.9 | 40 | 15 | [59] |
| SOLVENT1 | 2.8 | 60 | 9 | [60] |
| SOLVENT2 | 3.2 | 60 | 9 | [60] |
| MEA | 4.0 | 170 | 10.5 | [12] |
| BLEND1 | 3.8 | 170 | 10.5 | [12] |
| BLEND2 | 3.6 | 170 | 10.5 | [12] |