摘要
利用实验和巨正则系综蒙特卡罗(GCMC)方法研究了N2/HFC-134a(1,1,1,2-四氟乙烷)二元混合物在活性碳纤维(ACF)内的吸附分离.重点讨论了孔径、压强及温度对HFC-134a吸附选择性的影响,为不同条件下吸附空气中的微量HFC-134a提供了理论参考.结果表明:较小孔径、低压以及低温条件有利于HFC-134a的吸附分离.在常温下,HFC-134a在带有孔径分布的活性碳纤维材料内的吸附选择性可以达到62,表明我们所制备的活性碳纤维材料可以较好地分离空气中微量的HFC-134a.特别地,在常温和0.41×105Pa下,0.75nm的碳孔对HFC-134a的吸附选择性达到了230.因此,为了有效地吸附空气中的HFC-134a,推荐使用小孔径的碳材料.
The adsorption and separation of a binary mixture of N2 and HFC-134a（1,1,1,2-tetrafluoroethane） on activated carbon fibers（ACFs） was investigated by experiment and the grand canonical Monte Carlo（GCMC） method.The effects of pore size,pressure and temperature on the selectivity of HFC-134a over N2 on ACF were investigated.Results show that the selectivity of HFC-134a decreases with an increase in pore size,pressure and temperature.The selectivity of HFC-134a on ACF with a pore size distribution reaches 62 at room temperature,indicating that our sample is an excellent candidate for the removal of HFC-134a from air.In particular,the selectivity of HFC-134a over nitrogen on ACF with pores of 0.75 nm in size can reach 230 at 0.41×105 Pa and room temperature.Therefore,carbon materials with small pores are recommended to adsorb HFC-134a efficiently.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2010年第6期1637-1642,共6页
Acta Physico-Chimica Sinica
基金
国家自然科学基金重点项目(20736002)资助~~
关键词
巨正则蒙特卡罗方法
吸附选择性
1
1
1
2-四氟乙烷活性碳纤维
Grand canonical Monte Carlo method
Absorption selectivity
1
1
1
2-Tetrafluoroethane
Activated carbon fiber
