Preparation Of Alcoholamine Modified Graphene Oxide With SO 2 Adsorption Function And Study On Desulfurization Performance Of PVDF Blend Membrane

SO₂ is one of the main atmospheric pollutants,flue gas desulfurization technology is a very important and the most effective method to control emissions of SO₂.Instead of the traditional scrubbing processes,essentially which is a absorption process for SO₂,physical adsorption technology using absorbents to adsorbing SO₂ has drawn great attention gradually,because the process has many advantages such as simple to operate,no additional pollutants and requires less energy.In this work,alcamine molecules were immobilized on GO sheet and used for SO₂ absorption.The main work and conclusions are as follows:?1?Graphene oxide?GO?,an important ramification of graphene,which can provides a wide range of functionalities and reaction sites for chemical modification and more excellent physical properties than graphene.So,It it could be considered a good supporting material for immobilizing liquid organic amine and used as SO₂ adsorbents.Alcamines are a kind of liquid organic amine has a wide application in gas absorption,due to its strong affinity for acidic gas.In this study,alcamines-immobilized GO?GO-MEA,GO-DEA,GO-TEA?were firstly prepared by ring-opening reaction of epoxy groups on GO with amine group on alcamines.And adsorption-desorption process of SO₂ is discussed on the basis of experimental and spectroscopic analysis results.The modified GO showed a good SO₂ adsorption ability,and GO-DEA showed the best adsorption capacity for SO₂?188.5 mg/g?and maintain stable over five cycles of SO₂ adsorption and desorption.?2?Alcamines modified-GO/PVDF membranes which possess the were studied for SO₂ remove and absorption.The SO₂ adsorption performance of GO/PVDF,GO-MEA/PVDF,GO-DEA/PVDF and GO-TEA/PVDF membranes were studied and then the SO₂ absorption performance were also investigated using NaOH solution.The results showed that the SO₂ adsorption capacity significantly increase after blending 1%of GO-MEA,GO-DEA and GO-TEA,respectively and the GO-DEA/PVDF membrane show the best SO₂ adsorption capacity,the SO₂ equilibrium absorption capacity is 7.68 mg/g.Meanwhile,the GO-DEA/PVDF membrane also show excellent desulfurization performance,the desulfurization rate of is 69%when the flow rate of the absorbing liquid is 30 L/h.