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   Separation of Carbon Dioxide From Natural Gas By Matrimid-Based Mixed Matrix Membranes  
نویسنده Samadi Akbar ,Navarchian Amir H.
منبع Gas Processing Journal - 2016 - دوره : 4 - شماره : 2 - صفحه:1 -18
چکیده    Spherical mgo nanoparticles and flake-like clay minerals modified with polyaniline (pani) are applied in matrimid in order to fabricate mixed matrix membranes (mmms) having improved gas separation performance. the co2 permeability, co2/ch4 selectivity and co2-induced plasticization pressure of mmms are assessed at 4-30 bar feed pressure. the chemical structure, morphology and thermal properties of mmms are analyzed by fourier transform infrared equipped with attenuated total reflection (ftir-atr), x-ray diffraction, field emission scanning electron microscopy (fesem) and differential scanning calorimetry/thermogravimetric analyses. crater-like morphology is seen for mmms by fesem tests physical interaction of matrimid with mgo and pani, confirmed by ftir-atr, helps better distribution of both the fillers in the polymer matrix. mechanistical analysis of gas sorption and diffusion terms reveals that pani/clay (pc) enhances gas permeability by controlling diffusivity paths, while mgo nanoparticles improves both gas solubility and diffusivity. the permeability tests reveal that the sample pc5m5 with 5 wt% pc and 5 wt% mgo, has the best gas separation properties. high pressure tests reveal that this sample can enhance plasticization pressure and co2 permeability as well by 76% and 200%, respectively; resulting in 425% enhancement in mmms capacity in natural gas sweetening.
کلیدواژه Co2 Removal ,Mixed Matrix Membrane ,Matrimid ,Plasticization
آدرس University Of Isfahan, Faculty Of Engineering, Chemical Engineering Department, ایران, University Of Isfahan, Faculty Of Engineering, Chemical Engineering Department, ایران
پست الکترونیکی anavarchian@yahoo.com

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