CAJ | 학술논문

胺法捕集回收二氧化碳工艺存在的最大缺陷是高吸收速率与低再生能耗不能共存,高效溶剂的开发是解决这一问题的有效途径之一.为筛选出吸收解吸综合性能良好的吸收剂,本文利用溶剂快速筛选实验装置对几种不同醇胺吸收剂进行了实验研究,主要从溶液吸收负载、吸收速率、解吸负载、解吸速率、循环容量及相对再生能耗等方面进行了分析比较,实验结果显示 N,N-二乙基乙醇胺(DEEA)溶液表现出较好的 CO2 捕获性能.此外,通过溶解度装置、填料吸收塔及再生塔分别对 DEEA 溶液的平衡溶解度、传质系数及再生能耗进行了实验研究与验证.实验结果表明:增加溶液浓度会降低其 CO2 平衡溶解度;增加 CO2 分压能增加其 CO2 平衡溶解度;增大进料温度能增加溶液在填料塔中的传质系数;提高富液负载及贫液负载会降低溶液的再生能耗.因此,基于其较好的吸收解吸性能,DEEA 是一种可以工业化应用的潜在吸收剂.
알법포집회수이양화탄공예존재적최대결함시고흡수속솔여저재생능모불능공존,고효용제적개발시해결저일문제적유효도경지일.위사선출흡수해흡종합성능량호적흡수제,본문이용용제쾌속사선실험장치대궤충불동순알흡수제진행료실험연구,주요종용액흡수부재、흡수속솔、해흡부재、해흡속솔、순배용량급상대재생능모등방면진행료분석비교,실험결과현시 N,N-이을기을순알(DEEA)용액표현출교호적 CO2 포획성능.차외,통과용해도장치、전료흡수탑급재생탑분별대 DEEA 용액적평형용해도、전질계수급재생능모진행료실험연구여험증.실험결과표명:증가용액농도회강저기 CO2 평형용해도;증가 CO2 분압능증가기 CO2 평형용해도;증대진료온도능증가용액재전료탑중적전질계수;제고부액부재급빈액부재회강저용액적재생능모.인차,기우기교호적흡수해흡성능,DEEA 시일충가이공업화응용적잠재흡수제.
The major drawback of using amine for carbon dioxide (CO2) capture is the contradiction between lower regeneration heat duty and high CO2 absorption rate. One way to overcome this problem is to develop an alternative absorbent with improved performance of sorption and desorption CO2, which can make energy consumption decrease. A quick method was used for selecting potential solvent systems for CO2 capture by experimental study in this paper. The analysis and comparison were made based on CO2 loading during sorption and desorption, the absorption/stripping rate, cycling capacity, relative heat consumption and so on. It is demonstrated that aqueous N,N-diethylethanolamine ( DEEA ) solution is of better absorption/stripping performance for CO2 capture, which can be presented in terms of equilibrium solubility, overall mass transfer coefficient(KGaV) and regeneration heat consumption, and these parameters were experimentally measured with relevant setup. The results show that the equilibrium solubility of CO2 in DEEA solution increases with rising of CO2 partial pressure and decreases with the increase of solution concentration; the KGaV increases with rising of liquid temperature and energy consumption; and the regeneration heat duty decreases with lean CO2 loading and increases with rich CO2 loading. Due to the high performance of DEEA, it could be a promising alternative solvent for CO2 capture.