Physicochemical properties of amine solutions like density, viscosity, and surface tension results are indispensable for designing carbon dioxide (CO₂) absorption and regeneration columns, and they are also crucial for modeling and simulation for CO₂ capture applications using the postcombustion capture method. In the present work, the density and viscosity of 1-methylpiperazine (1-MPZ) solution are studied for the temperature range of 298.15 to 348.15 K. Surface tension measurements for temperatures ranging from 303.15 to 348.15 K are reported for various concentrations of 1-MPZ. To validate the instrumental accuracy and procedure, properties of aqueous 0.3 weight fraction (w) monoethanolamine (MEA) were first measured and compared with reported results before the study of 1-MPZ. The weight fraction of 1-MPZ was kept at 0.1, 0.2, 0.3, and 0.4 for the physical property study of unloaded aqueous 1-MPZ, and 0.3w was considered for CO₂-loaded properties. The 1-MPZ solution was loaded with CO₂ up to 0.45 mol CO₂/mol amine. The Redlich–Kister equation for excess molar volume was used to correlate the measured density of the fresh and CO₂-loaded solvents. The viscosity data of unloaded aqueous 1-MPZ and CO₂-loaded aqueous 1-MPZ were correlated using the Grunberg–Nissan and modified Weiland models, respectively. Surface tension results of fresh and CO₂-loaded 1-MPZ were fitted by a polynomial function. These new data and models are helpful for the design of postcombustion CO₂ capture using 1-MPZ-based solvents and their blends.

中文翻译：

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用于 CO2 捕集过程的 1-甲基哌嗪水溶液及其碳酸溶剂的密度、粘度和表面张力

胺溶液的物理化学性质（如密度、粘度和表面张力结果）对于设计二氧化碳 (CO ₂ ) 吸收和再生塔是必不可少的，而且对于使用燃烧后捕集方法的CO _{2捕集应用的建模和模拟也至关重要。}在目前的工作中，研究了 298.15 至 348.15 K 温度范围内 1-甲基哌嗪 (1-MPZ) 溶液的密度和粘度。报告了 303.15 至 348.15 K 温度范围内不同浓度 1-甲基哌嗪 (1-MPZ) 溶液的表面张力测量结果。 MPZ。为了验证仪器的准确性和程序，首先测量了 0.3 重量分数 ( w ) 单乙醇胺 (MEA) 水溶液的性质，并与 1-MPZ 研究之前报告的结果进行比较。对于未负载的水性1-MPZ的物理性质研究，1-MPZ的重量分数保持在0.1、0.2、0.3和0.4，并且对于CO ₂负载的性质考虑0.3w。1-MPZ溶液负载有高达0.45mol CO _{2 /mol胺的CO 2}。过量摩尔体积的 Redlich-Kister 方程用于将新鲜溶剂和负载 CO ₂的溶剂的测量密度关联起来。分别使用Grunberg-Nissan 和改进的Weiland 模型将未加载的1-MPZ 水溶液和负载CO ₂的1-MPZ 水溶液的粘度数据相关联。_{新鲜的和负载CO 2 的}1-MPZ的表面张力结果通过多项式函数拟合。这些新数据和模型有助于设计使用1-MPZ基溶剂及其混合物捕获燃烧后CO _{2 。}