High-level moisture removal is often encountered in the pressure swing adsorption (PSA) for air prepurification. The effects of high-concentration water vapor adsorption on the heat and mass transport characteristics of PSA should be described in detail for further design and optimization of air prepurification processes. In this work, a mathematical model of an alumina/13X-layered two-bed Skarstrom-type PSA cycle for the removal of high-level moisture along with CO₂ from air is established to study the heat and mass transport characteristics during the process. The maximum increase and decrease in temperature are related to the water vapor concentration in the feed air, and two simplified formulas are proposed to estimate their magnitudes. The mass transport characteristics, especially the penetration depths of the two impurities, are examined under different inlet temperatures, adsorption pressures, purge-to-adsorption flow rate ratios, inlet flow rates, and cycle times. A relation between the penetration depth of water vapor and the five operating parameters is developed and can be readily used to predict the location of the water vapor adsorption front in the PSA design for air prepurification and other purification processes involving high-level moisture.

中文翻译：

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变压吸附法去除空气中高水分和CO _2的传热和传质特性

在空气预净化的变压吸附（PSA）中经常遇到高水平的水分去除。应详细描述高浓度水蒸气吸附对PSA传热和传质特性的影响，以进一步设计和优化空气预净化工艺。在这项工作中，一个氧化铝/ 13X层两床Skarstrom型PSA循环的数学模型，用于去除高水平的水分以及CO ₂建立空气中的热源来研究过程中的热量和质量传输特性。温度的最大升高和降低与进料空气中水蒸气的浓度有关，并提出了两个简化的公式来估算其幅度。在不同的入口温度，吸附压力，吹扫-吸附流速比，入口流速和循环时间下，检查了物质的传输特性，尤其是两种杂质的渗透深度。已开发出水蒸气的渗透深度与五个操作参数之间的关系，可以很容易地用于预测PSA设计中用于空气预净化和其他涉及高水分的净化过程中水蒸气吸附前沿的位置。