AI 中文总结
本研究搭建新型层流射流装置（LJA），结合PFG-NMR测量CO₂在1-丁醇中的扩散系数，发现LJA数据偏低，推测存在气液界面传质阻力，需后续研究验证。
AI 中文摘要
为开展最高达12 bar的气液传质精准测量，研发了新型层流射流装置（LJA），显著拓展了该技术的工作范围；将其应用于283 K至333 K条件下的二氧化碳+1-丁醇体系，同时采用不涉及界面传质的脉冲场梯度核磁共振光谱（PFG-NMR）进行对应测量。在无限稀释极限下，LJA测得的菲克扩散系数与PFG-NMR测得的自扩散系数本应一致，二者显示出一致的变化趋势，但LJA数据系统性偏低，实验误差无法解释该偏差，因此假设存在额外的气液界面传质阻力；PCP-SAFT结合密度梯度理论预测界面处存在高浓度CO₂富集，且偏差与该富集程度相关，这种界面阻力是否存在及是否由富集导致仍需未来研究确认。
英文摘要
A novel laminar jet apparatus (LJA) was constructed for precise gas-liquid mass transfer measurements up to 12 bar, significantly extending the technique's operating window. It was applied to carbon dioxide + 1-butanol between 283 K and 333 K. Corresponding measurements were performed using pulsed field gradient NMR spectroscopy (PFG-NMR), which does not involve interfacial mass transfer. Fick diffusion coefficients from LJA and self-diffusion coefficients from PFG-NMR were compared in the limit of infinite dilution, where both must coincide. Both methods show consistent trends, but LJA data are systematically lower. Experimental errors cannot explain the deviations. We therefore hypothesize an additional gas-liquid interfacial mass transfer resistance. PCP-SAFT combined with density gradient theory predicts high CO$_{2}$ enrichment at the interface, and the deviations correlate with this enrichment. Whether such an interfacial resistance exists and is caused by enrichment remains to be established in future studies.
