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    Novel hydrophobic PDVB/R-SiO2 for adsorption of volatile organic compounds from highly humid gas stream

    Year: 2013

    Journal: Journal of Hazardous Materials, Volume 262, 15 November 2013, Pages 83–90, 20131119

    Authors: Han-feng Lu, Jie-jing Cao, Ying Zhou, De-li Zhan, Yin-fei Chen

    Organizations: College of Chemical Engineering and Materials Science, Research Institute of Catalytic Reaction Engineering, Zhejiang University of Technology, Hangzhou 310014, China

    A novel organic–inorganic hydrophobic polydivinylbenzene–silica adsorbent (PDVB/R-SiO2) was successfully prepared by introducing a specific amount of divinylbenzene and solvent (i.e., tetrahydrofuran) to SiO2pores and initiating polymerization under solvothermal conditions. New smaller structures and surface areas were formed in the SiO2 pores. The PDVB/R-SiO2-0.5 samples exhibited a bimodal pore size distribution with both SiO2 micropores/mesopores (0.5–2.0 nm) and mesopores (2.0–5.0 nm). The surface areas increased from 116 m2/g (SiO2) to 246 m2/g. The breakthrough curves of toluene adsorption indicated that the amount adsorbed on PDVB/R-SiO2-0.5 was 12 times higher than that on SiO2. The highly humid environment exhibited no effect on adsorption because the surface of PDVB was functionalized. The adsorbed toluene was easily desorbed in hot N2 stream at 100 °C. After 10 adsorption–desorption cycles, PDVB/R-SiO2-0.5 continued exhibiting excellent adsorption, indicating superior structural and regeneration abilities.