This study evaluates the pressure retarded osmosis performance of TMA–CO₂ for potential use in osmotic heat engines. Power densities up to 18.6 W m⁻² were achievable at relatively low pressure (10 bar) using 5 M TMA–CO₂ draw solutions. Compared to NaCl control tests, the TMA–CO₂ exhibited 20% lower water flux due in large part to its larger molecular size and associated higher solution viscosity and lower diffusion coefficient. Compared to the ammonia‐carbon dioxide draw solution, water flux was comparable but reverse solute flux of TMA–CO₂ was nearly one order of magnitude lower. Larger solute size was found to create a performance tradeoff as reduced reverse solute flux improved water flux while higher viscosity and lower diffusion coefficient worsened water flux. © 2018 American Institute of Chemical Engineers AIChE J, 64: 3369–3375, 2018

中文翻译：

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用于渗透引擎的三甲胺-二氧化碳抽吸溶液

这项研究评估了TMA-CO ₂在渗透热机中的潜在应用的压力延迟渗透性能。使用5 M TMA-CO ₂汲取溶液，可以在相对较低的压力（10 bar）下实现高达18.6 W m ^-2的功率密度。与NaCl对照测试相比，TMA–CO _2的水通量降低了20％，这在很大程度上是由于其分子尺寸较大，以及较高的溶液粘度和较低的扩散系数。与氨-二氧化碳抽取溶液相比，水通量相当，但TMA–CO _2的反向溶质通量降低了近一个数量级。发现较大的溶质尺寸会产生性能折衷，因为降低的反向溶质通量会改善水通量，而较高的粘度和较低的扩散系数则会使水通量变差。©2018美国化学工程师学会AIChE J，64：3369–3375，2018