Energy efficient solvent was formulated from 2-amino-2-methyl-1-propanol (AMP), piperazine (PZ), and triethanolamine (TEA). Since AMP and PZ can precipitate, ternary blend was explored at unloaded and rich CO₂ loading (0.6 mol CO₂/mol amine). Either too low TEA concentration, too low PZ/AMP molar ratio, or an increase total amine concentration from 5.0 to 5.5 or 6.0 M induced the precipitation at rich CO₂ loading. Even though equilibrium CO₂ loaded density and viscosity of the blends were higher than that of 5.0 M MEA (especially, viscosity), they are in operational ranges. A proper solvent formulation strategy was to trade-off between an increment of PZ/AMP molar ratio (favors the absorption) and an elevation of TEA concentration (positively affects the regeneration). Respecting 5.0 M MEA, 0.7/2.8/1.5 has 9 % higher capacity, 73 % greater cyclic capacity, 45 % larger mass transfer coefficient, 5 % higher CO₂ removal percentage, and 26 % lower regeneration energy.

中文翻译：

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用于燃烧后碳捕获的节能型三元 2-氨基-2-甲基-1-丙醇、哌嗪和三乙醇胺混合物


节能溶剂由 2-氨基-2-甲基-1-丙醇 （AMP）、哌嗪 （PZ） 和三乙醇胺 （TEA） 配制而成。由于 AMP 和 PZ 可以沉淀，因此在未负载且富含 CO₂ 负载（0.6 mol CO₂/mol 胺）下探索三元共混物。TEA 浓度过低、PZ/AMP 摩尔比过低或总胺浓度从 5.0 增加到 5.5 或 6.0 M 都会在富含 CO₂ 负载的情况下诱导沉淀。尽管混合物的平衡 CO₂ 负载密度和粘度高于 5.0 M MEA（尤其是粘度），但它们仍处于操作范围内。适当的溶剂配制策略是在 PZ/AMP 摩尔比的增加（有利于吸收）和 TEA 浓度的升高（对再生产生积极影响）之间进行权衡。对于 5.0 M MEA，0.7/2.8/1.5 的容量提高了 9%，循环容量增加了 73%，传质系数提高了 45%，CO₂ 去除率提高了 5%，再生能量降低了 26%。