矿井抽放煤层气中甲烷的变压吸附提浓

变压吸附(PSA)技术提浓矿井抽放煤层气中的甲烷(CH4)对解决煤层气对环境的污染、得到高效能源和化工原料具有重要意义.为此,介绍了以活性炭作吸附剂,PSA提浓抽放煤层气中CH4的国内外研究和应用状况,系统地从理论和实验上探讨了PSA分离煤层气的热力学关系、动力学过程以及PSA操作参数对浓缩CH4效果的影响,并对存在的问题提出了相应的建议.

Pressure Sweep Adsorption Processes for the Concentration of Methane from Coal-bed Gas Extracted

The coal-bed gas was usually extracted from mine in order to avoid coal gas outburst.The Methane(CH4),a main component in coal-bed gas,is a kind of excellent gas fuel and raw material for chemical industry.China is very rich in the resource of coal bed gas,however,most of the coal bed gas extracted from mine is wasted because of the too low concentration of methane. Pressure sweep adsorption(PSA) technique is noticeable among the methods for the concentration of methane from coal-bed gas.However,there are a few studies about this field.Studies on the pressure sweep adsorption(PSA) process for the separation of CH4/N2 using actived carbon as adsorbent are summarized.The thermodynamic relationships and kinetic processes and the influence of the operate parameters on the concentration of methane are investigated.These results have a direct application in coal-bed gas.Some suggestions for the problems need to be solved in PSA process for the separation of methane are also proposed.