摘要
传统的填料塔工艺有成熟和大规模应用的优势,但也存在诸多问题,膜吸收技术捕获CO2因其自身优势是一个值得关注的研究方向。简述了CO2捕获的主要技术路线,介绍了膜技术分离CO2的特点、优势,并详细介绍了膜吸收技术的最新研究进展,提出膜吸收技术当前需要解决的问题主要有膜的润湿性长期稳定性、溶剂的挥发性、膜和吸收剂的兼容性、SO2和O2等杂质的去除、膜的成本及经济性分析比较等。
The paper wishes to provide a general survey and review of the latest advancements in the membrane-based technologies for CO2 capture. As is known,the conventional compact columns processes are advantageous for their maturity and large-scale implementation for CO2 capture,though there exists some problems to be solved,including high-cost for their construction and a variety of operational problems such as liquid channeling,flooding,entrainment and foaming. However,we do appreciate the membrane-based technology,which is worthwhile to pay close attention to its advantages,such as independent liquid and gas flow,less energy-consumption,easy-to-operate,a very high surface area for the volume ratio,modular design of linear scale-up,highly selective and driving force for separation. In this paper,we would like to introduce three sections for the current problems to be solved： the chief characteristic technological routes for CO2capture; the details of characteristic features,advantages and distinctions of membrane-based technologies with other current techniques and a general view of the recent developments. The membrane-based technologies for CO2 capture take much the same process. It is better to have the liquid flowing on the shell side than in the fiber lumen due to an improved contact between the liquid and gas phases. Mention should also be done of the polypropylene（ PP）,polytetrafluoroethylene（ PTFE） and polyvinylidenfluorid（ PVDF） as the commonest polymer membrane materials in this paper,with alkanol amines being chosen as the widespread absorbent in CO2 removal system. Besides,it is also necessary to make a comment on the challenges faced at present： the wetting and long-term stability of membranes; the volatility of the solvents; the chemical compatibility between the solvent and the membrane contactor; the effect of common gases,such as SO2 and O2. What is more,we have chosen parameters for necessary comparison between the systems operating at different CO2 inlet concentrations and different
出处
《安全与环境学报》
CAS
CSCD
北大核心
2015年第3期205-211,共7页
Journal of Safety and Environment
基金
江西省青年科学基金项目(20122BAB213020)
关键词
环境工程学
CO2捕获
膜吸收技术
膜材料
吸收剂
environmental engineering
CO2capture
membrane absorption technology
membrane materials
absorbents
