The utilization of biogas is somewhat limited by its composition especially CO₂. The CO₂ content in biogas can be substantially reduced via chemical absorption. In this work, the absorption performance of CO₂ removal from biogas using aqueous monoethanolamine (MEA) in a T-type microchannel (0.5 × 0.5 × 60 mm³) was experimentally investigated. The effects of operating parameters including MEA-to-CO₂ molar ratio, temperature, pressure, and flow rate of MEA solution were studied in terms of main and interaction effects via statistical analysis. Temperature and MEA-to-CO₂ molar ratio showed relatively strong influence on both %absorption and the liquid-side volumetric mass transfer coefficient. A positive confounding effect between these two parameters was also present. Hence, high temperature and high molar ratio resulted in high performance CO₂ removal from biogas. Methane purity of 90% was obtained with the molar ratio of 1.8 at 50 °C. The k_La of 517 s⁻¹ was achieved at the MEA-to-CO₂ molar ratio of 5:1, 50 °C, 2 bar, and 3 mL/min of the MEA solution. In addition, the absorption flux of CO₂ in MEA solution, overall mass transfer coefficient, and kinetic rate constant were evaluated to interpret the experimental results.

沼气的利用在某种程度上受到其成分特别是CO _2的限制。沼气中的CO ₂含量可通过化学吸收大大降低。在这项工作中，实验研究了使用T型微通道（0.5×0.5×60 mm ³）中的单乙醇胺水溶液（MEA）从沼气中去除CO ₂的吸收性能。通过统计分析，从主效应和相互作用的角度研究了MEA -CO ₂摩尔比，MEA溶液的温度，压力和流速等操作参数的影响。温度和MEA-to-CO ₂摩尔比对％吸收和液体侧体积传质系数均显示相对强烈的影响。这两个参数之间也存在积极的混杂效应。因此，高温和高摩尔比导致从沼气中去除高性能的CO ₂。在50℃下以1.8的摩尔比获得90％的甲烷纯度。在MEA溶液与CO _2的摩尔比为5：1、50°C，2 bar和3 mL / min的MEA溶液中，达到517 s ^-1的k _L a。另外，评估了MEA溶液中CO ₂的吸收通量，总传质系数和动力学速率常数，以解释实验结果。