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首页> 外文会议>AIChE Annual Meeting >ELECTROCHEMICAL CARBON DIOXIDE SEPARATION USING MEMBRANE-ELECTRODE ASSEMBLIES
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ELECTROCHEMICAL CARBON DIOXIDE SEPARATION USING MEMBRANE-ELECTRODE ASSEMBLIES

机译：使用膜 - 电极组件进行电化学二氧化碳分离

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A CO2 removal system using membrane electrode assembly (MEA) technology to electrochemically separate CO2 from an exhaled breathing within a breathing loop has been demonstrated. An anion exchange membrane (AEM) was used with catalyst coated electrodes to separate CO2 from a humidified breathing gas mixture. At the MEA cathode, Pt-catalyzed reduction of CO2 converts CO2 into bicarbonate ions that are then electrochemically driven across the AEM. The reformation process of CO2 at the anode to complete the gas separation was studied using oxidation catalysts, such as Ni, IrO2, and RuO2. Several membrane and electrocatalyst materials were characterized for electrochemical CO2 separation. Electrode efficiency and CO2 flux was characterized in asymmetric MEA with a Pt cathode and Ni anode using an AEM (Pt-Ni MEA) from 22 ?C – 50 ?C and CO2 partial pressure at the cathode from 0.05 atm to 0.20 atm. Polarization response and electrochemical impedance spectroscopy was used to characterize performance in a environmentally controlled and metered atmosphere. Under optimal conditions Pt-Ni MEA device achieved a flux of 1.10 L/m2·min equivalent at 1.6 V with a constant current density of 10 mA/cm2. The Pt cathode and RuO2 anode MEA with an AEM (Pt-RuO2 MEA) at 10 mA/cm2 maintained an average voltage of 1.09 V with a CO2 flux of 1.03 L/m2·min.
机译：已经证明了使用膜电极组件（MEA）技术从呼吸回路内从呼吸呼吸电化学方式电化学分离的CO2的CO 2去除系统。阴离子交换膜（AEM）与催化剂涂覆的电极一起使用，从加湿的呼吸气体混合物中分离CO 2。在MEA阴极，Pt催化的CO 2还原转化为碳酸氢盐离子，然后将电化学驱动穿过AEM。使用氧化催化剂，例如Ni，Iro2和RuO 2，研究了阳极在阳极处完成气体分离的CO 2的重整过程。用于电化学CO2分离的几种膜和电催化剂材料的特征。电极效率和CO2通量的特征在于使用来自22℃（Pt-Ni Mea）的Pt阴极和Ni阳极的不对称MEA，从22℃（pt-ni mea）和在阴极下的CO 2分压力为0.05atm至0.20atm。偏振响应和电化学阻抗光谱用于表征环境控制和计量气氛中的性能。在最佳条件下，Pt-Ni MEA器件在1.6V下实现了1.10升/m2·min的通量，恒定电流密度为10mA / cm2。具有10mA / cm2的Pt阴极和RuO2阳极Mea，具有10mA / cm2的AEM（Pt-RuO 2 Mea）保持1.09V的平均电压，CO 2焊剂为1.03L / m 2·min。

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