提出利用丙烷（C₃H₈）为吸收剂，采用溶剂吸收的方法，对高含氮气的沼气进行脱氮净化处理。通过分析常规的沼气净化工艺的特点，利用Aspen Pluse模拟软件分别分析了C₃H₈对CH₄、N₂、CO₂的吸收能力不同的性质，在此基础上，利用Aspen Pluse模拟了C₃H₈为吸收剂对沼气进行脱氮模拟，设计了一套沼气脱氮净化工艺。经模拟实验发现，采用该净化工艺对沼气脱氮净化后，CH₄的体积分数达到95%，能极大的提高了沼气的热值。

In this paper, a new solvent absorption method is proposed to remove nitrogen from the high nitrogen containing marsh gas in landfill sites by using propane (C₃H₈) as absorbent. Based on analyzing the characteristics of conventional purification process for marsh gas, Aspen Plus simulation software is used to analyze the absorb performances of propane against methane, nitrogen and carbon dioxide respectively. Furthermore, Aspen Plus is used to simulate the removal of nitrogen from marsh gas by using propane as absorbent, and a nitrogen removal process is designed. The simulation tests disclose that the volumetric concentration of methane can reach 95% after removing nitrogen from marsh gas by using this process, which can greatly improve the calorific value of marsh gas.

陈一帆(1991-),男,硕士生。