Abstract
A novel xFe2O3/ HNb3O8-NS composite adsorbents with high removal efficiency toward ethyl mercaptan in methane is reported. Fe2O3 nanoparticles with high specific surface area and stability were prepared, and combined with HNb3O8 nanosheet (HNb3O8-NS) through the exfoliation-reassembled method. The texture and properties of the as-prepared composites were investigated by several characterization techniques. The adsorption properties of the as-prepared adsorbents were systematically evaluated by adsorption of ethyl mercaptan in methane gas. The results reveal that the as-prepared composites present better adsorption features than their precursors HNb3O8-NS and Fe2O3, and an optimum removal of ethyl mercaptan performance was obtained at x = 0.7 with the ethyl mercaptan capacity of 48.05 mg∙g−1. The results suggest that appropriate Fe2O3 doping content could result in excellent removal of ethyl mercaptan performance. The excellent adsorptive performance of Fe2O3/ HNb3O8-NS may be on account of the unique characteristics of Fe2O3 and HNb3O8-NS: (i) HNb3O8-NS promoting the high dispersion of Fe2O3 nanoparticle, and (ii) the synergistic effect between Fe2O3 and HNb3O8-NS. Because of the high adsorption capacity towards ethyl mercaptan, Fe2O3-incorporated HNb3O8-NS has been proved to be a promising adsorbent for purification of natural gas.
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