محمد جعفري

Focusing on new methods of air separation provides the possibility of entering the economic field in various industrial fields such as fire fighting, chemical, pharmaceutical, food and aerospace industries. Oxygen and nitrogen absorption methods based on modern absorbents is one of the latest scientific topics regarding the method, absorption conditions and type of oxygen absorbent. Nowadays, molecular analysis and the use of density function theory to eva‎luate the amount of adsorption energy and determine the adsorption energy bands for oxygen and nitrogen absorption are widely used in the research. In this research, carbon-based adsorbents have been eva‎luated to examine challenges and solutions. The results of laboratory and simulation studies show that mainly researches have been carried out for the separation of oxygen and nitrogen from air and other gases using different carbon-based adsorbents. The adsorbent synthesized in this research is a multi-walled carbon nanotube, which after synthesis from Activated carbon is used to modify the absorbent surface. Testing of the adsorbent is done by a laboratory set-up, in the temperature range of 278 to 308 degrees Kelvin and the pressure range is 2 to 10 bar. The maximum amount of absorption by the multi-walled carbon nanotube adsorbent for oxygen gas and nitrogen gas is 7.126 and 6.3 mmol/g, respectively, after modifying the surface of the adsorbent, the amount of oxygen and nitrogen gas absorption increased to 9.63 and 7.58 mmol/g, respectively. Is. The experimental data were used to obtain the best isotherm and kinetic model, the sips isotherm model and the Elovich kinetic model have the most agreement with the experimental data. The potential of adsorption model, sips isotherm and Elovich kinetic models. After the thermodynamic analysis of the data, we found that the absorption is exothermic and spontaneous. Also, the performance of the adsorbent decreased from 100% to 96% in the 10th regeneration cycle.

كربن نانو تيوب چند جداره , اكسيژن , نيتروژن , جذب سطحي

Multi walled carbon nano tubes , Oxygen , nitrogen , surface adsorption

mohammad jafari

ahad ghaemi