https://doi.org/10.1016/j.cesx.2019.100032
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The density of the blended amines is tabulated in Table 4 and presented in Fig. 6 along with density data for DEEA/MAPA solutions reported by Monteiro et al. (2015). The density decreased with increasing temperature and decreased with increasing concentration of the tertiary amine blended with MAPA. For the blended amines with equal molarity, the density for 1-(2HE)PRLD blended with MAPA was the highest. The density of 3DMA1P/MAPA solutions was slightly lower than that of the DEEA/MAPA solutions.
Table 4. Density data for aqueous solutions of 3DMA1P and 1-(2HE)PRLD blended with MAPA, g cm−3.
| T (°C) | 2 M 3DMA1P + 1 M MAPA | 3 M 3DMA1P + 1 M MAPA | 4 M 3DMA1P + 1 M MAPA | 3 M 1-(2HE)PRLD + 1 M MAPA |
|---|---|---|---|---|
| 25 | 0.9845 | 0.9789 | 0.9693 | 1.0073 |
| 30 | 0.9818 | 0.9755 | 0.9658 | 1.0038 |
| 40 | 0.9755 | 0.9681 | 0.9577 | 0.9962 |
| 50 | 0.9690 | 0.9607 | 0.9496 | 0.9888 |
| 60 | 0.9619 | 0.9528 | 0.9412 | 0.9808 |
| 70 | 0.9547 | 0.9449 | 0.9326 | 0.9728 |
| 80 | 0.9469 | 0.9365 | 0.9233 | 0.9643 |
Fig. 6. Density (ρ) of MAPA promoted tertiary amines. *Monteiro et al. (2015).
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