Affiliation:
1. School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China
2. State Key Laboratory of Petroleum Pollution Control, Beijing 102206, China
3. Shanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation (under planning), Shanxi Province, China
Abstract
In China, owing to the methane concentration being below 0.75%, the coal ventilation air methane (CVAM) is usually emitted directly into the atmosphere, rather than utilized, which not only causes huge waste of energy but also exerts potential hazards to the greenhouse effect. It is important and practicable to save costs of development and investment by simulating enrichment and separation of CVAM with an aim to improve the efficiency and recovery of adsorption separation. Above all, it will have important practical significance to the development of adsorption separation. In this paper, the experiment of the pressure swing adsorption process was carried out on double towers built by our laboratory, and the Aspen Adsorption was used to simulate the process. The effect of the operation parameters on the desorbed methane concentration was studied by altering the feed concentration, the adsorbed pressure, and adsorbed and desorbed time. The results of simulation and experiment are basically consistent. The ratio of methane was decreased following the increasing concentration of the feed. The optimum adsorption pressure and time were found to be 210 kPa and 120 s, respectively. The optimum desorption times of experiment and simulation were 150 s and 120 s, respectively. Because there was a man-made 30 s time lag between the experiment and simulation to protect the vacuum pump, the results show that the simulation and experiment were matched well. Therefore, we can make use of Aspen Adsorption to design separation and enrichment of CVAM, providing theoretical and practical guidance for the gas separation and saving resources and energy.
Funder
Fundamental Research Funds for the Central Universities
Subject
Surfaces and Interfaces,General Chemical Engineering,General Chemistry
Reference22 articles.
1. Pressurization with raffinate in vacuum pressure-swing adsorption for upgrading ventilation air methane;Y. S. Liu;Journal of China Coal Society,2013
2. Vacuum exhaust processes in vacuum pressure-swing adsorption for upgrading methane in ventilation air methane;Y. L. Li;Advanced Materials Research,2012
3. Study on low concentration oxygen-bearing coal mine methane enrichment by pressure swing adsorption;X. Yang;Journal of China Coal Society,2011
4. Experimental study on separation and enrichment of ventilation air methane by vacuum pressure swing adsorption;T. Zhu;Safety in Coal Mines,2015
5. A versatile process simulator for adsorptive separations
Cited by
5 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献