摘要
大型湿气源排放中普遍存在的水汽是制约吸附碳捕集规模化发展的重要挑战之一。H_(2)O的极性往往会导致吸附材料的CO_(2)捕集率降低甚至出现失效,也会造成捕集系统产生温降、压降等寄生损失,甚至形成设备腐蚀、吸附剂中毒等不利影响,最终额外能耗和成本大幅提高。为解决上述挑战,深入理解CO_(2)与H_(2)O共吸附过程的作用机制,据此开发成本合理、再生能耗低且对水气不敏感的高效CO_(2)吸附剂及吸附技术是实现湿气源下高效吸附碳捕集的重要途径。目前,由于分散在多个领域且各有侧重,关于H_(2)O对CO_(2)吸附影响的机制分析缺乏汇总与概括,难以形成相对统一的观点。本文针对CO_(2)与H_(2)O共吸附过程,从宏观与微观层面进行了详细综述。首先,基于共吸附机制的基础研究,依次介绍了竞争吸附、变湿吸附和呼吸效应领域的研究进展并进行了简要评价。其次,基于共吸附的应用研究,阐述了湿气源CO_(2)捕集技术的吸附剂研发与工艺改进两部分的现状及进展,也对不同湿气源下CO_(2)捕集水平进行了简要评价。最后,总结了目前研究中的不足之处并展望了未来的研究方向。本文将分散于各领域的CO_(2)与H_(2)O共吸附过程进行集中归纳、分析和对比,或可为湿气源碳捕集技术提供有效的指导。
The presence of water vapor in gas streams is a significant technical issue for restricting the large-scale development of carbon capture. The polarity of H_(2)O often leads to the decrease or even failure of CO_(2) capture rate of adsorbents. In addition, it also causes parasitic losses such as temperature and pressure drop to the system, and even causes equipment corrosion and adsorbent poisoning, thus greatly increasing the extra energy consumption and cost. In order to solve the above bottleneck, understanding the mechanism of H_(2)O/CO_(2) co-adsorption and developing the highly efficient CO_(2) adsorbent with reasonable cost, low regeneration energy consumption and insensitivity to H_(2)O are the important basis for the realization of effective CO_(2) adsorption capture under wet gas streams. At present, due to the dispersion in multiple fields and different emphasis points, there is a lack of summary on the mechanism analysis of the influence of H_(2)O on CO_(2) adsorption, and it is difficult to form a relatively unified view. In this paper, the co-adsorption process of CO_(2) and H_(2)O are reviewed in detail from the macro and micro levels. Firstly, according to the fundamental research of co-adsorption mechanism, the progress in the fields of competitive adsorption, moisture swing adsorption and “breathing effect” are reviewed and briefly evaluated. Secondly, based on the application research of co-adsorption, the status and progress of adsorbent development and technology improvement of wet gas CO_(2) adsorption are described. Furthermore, the CO_(2) adsorption capture level under different wet gas sources is also briefly evaluated. Finally, the shortcomings of the current research are summarized and the future directions are prospected. This paper attempts to summarize, analyze and compare the CO_(2)/H_(2)O co-adsorption processes in various fields, which may provide effective guidance for CO_(2) adsorption capture in wet gas source.
作者
赵洁
邓帅
赵力
赵睿恺
Jie Zhao;Shuai Deng;Li Zhao;Ruikai Zhao(Key Laboratory of Efficient Utilization of Low and Medium Grade Energy(Tianjin University),Ministry of Education of China,Tianjin 300350,China;International Cooperation Research Centre of Carbon Capture in Ultra-low Energy-consumption,Tianjin University,Tianjin 300350,China)
出处
《化学进展》
SCIE
CAS
CSCD
北大核心
2022年第3期643-664,共22页
Progress in Chemistry
基金
国家重点研发计划(No.2017YFE0125100)
国家自然科学基金项目(No.51876134)
天津市科学技术研究计划(No.18YDYGHZ00090)资助。
