Synthesis of Molecularly Imprinted Polymers and Adsorption of NO2 in Flue Gas

Abstract

Molecularly imprinted polymers (MIP1 and MIP2) were synthesized using acrylamide as the functional monomer and acetic acid and ethanedioic acid as the template, respectively. Textural properties of MIPs and nonimprinted polymer (NIP) were characterized by an N2 adsorption experiment, thermogravimetric analysis, and Fourier transform infrared spectroscopy. NO2 basic adsorption conditions were set as 40 °C for the temperature, 100 mL/min for the flow rate, and 1000 ppm for the NO2 concentration through fixed-bed breakthrough experiments, and at these conditions, the NO2 adsorption capacity of MIP1, MIP2, and NIP was 0.58, 0.63, and 0.51 mg/g, respectively. The NO2 adsorption performance was nearly unaffected by O2; however, SO2 and CO2 inhibited NO2 adsorption severely. The H2O molecule had fewer negative effects on NO2 adsorption because of the large number of hydrophobic groups −(CH2–CH)n– in polymers and the hydrogen bond force between H2O molecules.