第43卷第2期2023年4月投稿网址:http://journal.lnpu.edu.cn辽宁石油化工大学学报JOURNALOFLIAONINGPETROCHEMICALUNIVERSITYVol.43No.2Apr.2023NaX分子筛吸附分离CO2/CH4的巨正则蒙特卡洛模拟赵静,刘添翼,李强,张晓欣,秦玉才,宋丽娟(辽宁石油化工大学石油化工学院,辽宁抚顺113001)摘要:采用巨正则蒙特卡洛模拟与理想吸附溶液理论相结合的方法,研究了CO2、CH4分子在NaX分子筛上的吸附性能。通过对比实验数据在不同吸附理论模型下的拟合结果并计算相应的吸附热,描述了CO2、CH4气体的吸附分离过程。结果表明,CH4分子的吸附强度比CO2分子弱,更贴近理想吸附;CO2分子的吸附选择性随其在空气中的体积分数升高而降低,在低压条件下随温度的升高而降低。因此,低温低压更有利于CO2分子的分离。关键词:吸附分离;CO2/CH4混合气体;巨正则蒙特卡洛模拟;吸附选择性中图分类号:TE645文献标志码:Adoi:10.12422/j.issn.1672⁃6952.2023.02.003GrandCanonicalMonteCarloSimulationofAdsorptionandSeparationPerformancesofCO2/CH4byNaXZeoliteZhaoJing,LiuTianyi,LiQiang,ZhangXiaoxin,QinYucai,SongLijuan(SchoolofPetrochemicalEngineering,LiaoningPetrochemicalUniversity,FushunLiaoning113001,China)Abstract:Inthispaper,themethodofcombiningGrandCanonicalMonteCarlosimulationandIdealAdsorptionSolutionTheorywasusedtostudytheadsorptionperformanceofCO2andCH4onNaXzeolite.Bycomparingthefittingresultsofsimulationdataunderdifferentadsorptiontheoreticalmodelsandcalculatingtheadsorptionheat,adescriptionoftheadsorptionandseparationprocessofCO2andCH4gaswasobtained.TheresultsshowthattheadsorptionstrengthofCH4moleculesisweakerthanthatofCO2molecules,anditsadsorptionisclosertotheidealadsorption.TheadsorptionselectivityofCO2moleculesisdecreaseswiththeincreaseofitscontentintheair,anddecreaseswiththeincreaseoftemperatureunderlowpressureconditions.Therefore,lowtemperatureandlowpressurearemoreconducivetotheseparationofCO2molecules.Keywords:Adsorptionandseparation;CO2/CH4mixture;GrandCanonicalMonteCarlosimulation;Adsorptionselectivity在输送天然气的过程中,少量CO2就能对运输设备造成腐蚀。另外,CO2的存在还会使天然气的热值下降,不满足国家标准,并且对深加工造成...