CAJ | 학술논문

密闭空间CO2脱除是环境控制和生命保障系统的重要任务,研究适用于密闭空间高活性可再生CO2清除剂至关重要。本文利用热重分析系统对钾基负载型吸收剂K2 CO3/AC ( AC为活性炭)进行实验。在20℃,1%CO2和2%H2 O基准工况下,对比吸收剂和载体AC的反应特性,探索K2 CO3/AC常温下脱除密闭空间CO2反应机理,并探究温度、CO2浓度和H2 O浓度等反应条件对脱碳特性影响。结果表明：载体AC对H2 O和CO2脱除机制为物理吸附作用；K2 CO3/AC主要依靠活性组分K2 CO3与二者的化学反应,在H2 O气氛中通过水合反应迅速转化为K2 CO3·1.5H2 O,在CO2/H2 O气氛中通过碳酸化反应生成KHCO3,表现出优越的反应活性。 K2 CO3/AC的碳酸化反应性能随着温度升高而减弱,随着CO2浓度和H2 O浓度增加而增强。该研究结果确定了K2 CO3/AC常温下脱除低浓度CO2反应机理,为常温下密闭空间CO2脱除技术提供了理论基础。
밀폐공간CO2탈제시배경공제화생명보장계통적중요임무,연구괄용우밀폐공간고활성가재생CO2청제제지관중요。본문이용열중분석계통대갑기부재형흡수제K2 CO3/AC ( AC위활성탄)진행실험。재20℃,1%CO2화2%H2 O기준공황하,대비흡수제화재체AC적반응특성,탐색K2 CO3/AC상온하탈제밀폐공간CO2반응궤리,병탐구온도、CO2농도화H2 O농도등반응조건대탈탄특성영향。결과표명：재체AC대H2 O화CO2탈제궤제위물리흡부작용；K2 CO3/AC주요의고활성조분K2 CO3여이자적화학반응,재H2 O기분중통과수합반응신속전화위K2 CO3·1.5H2 O,재CO2/H2 O기분중통과탄산화반응생성KHCO3,표현출우월적반응활성。 K2 CO3/AC적탄산화반응성능수착온도승고이감약,수착CO2농도화H2 O농도증가이증강。해연구결과학정료K2 CO3/AC상온하탈제저농도CO2반응궤리,위상온하밀폐공간CO2탈제기술제공료이론기출。
TheremovalofCO2fromconfinedspacestomaintainitsconcentrationatanacceptable level is emerging as a significant task in environmental control and life support system. It is crucial to develop a renewable sorbent with high activity for CO2 capture in confined spaces. A novel potassium-based sorbent of K2 CO3/AC ( AC: activated carbon ) was synthesized via impregnation method. The reaction mechanism and CO2 capture characteristics of the sorbent at ambient temperature were investigated with thermo-gravimetric apparatus ( TGA) . The results showed that weak adsorption capacity of the support of AC on CO2 and H2 O was attributed to the physisorption of its porous structure, while chemisorption was responsible for the CO2 capture process of K2 CO3/AC. It was confirmed that the sorbent exhibited superior capture capacity by converting K2 CO3 into K2 CO3 ·1. 5H2 O in H2 O and KHCO3 in CO2/H2 O with rapid chemical reactions, which were so-called hydration and carbonation. The CO2 capture performance of K2 CO3/AC increased with the increase of CO2 and H2 O concentrations but decreased with the increase of temperature. The results obtained in this study determined the mechanism of K2 CO3/AC for capturing CO2 of low concentration at ambient temperature, which would effectively provide statistical support for CO2 removal from confined spaces.