Hydrogen sulfide removal from biogas on ZIF-derived nitrogen-doped carbons

This work studied the H2S removal from biogas, a CO2-containing gas mixture, over nitrogen-doped carbon materials deriving carbonization of ZIF-8. The sorption performance on series N-doped porous was investigated, in which N-doping composition and textural properties adsorbents were turned by varying temperatures. By changing temperatures 750 to 950 ℃, N contents vary range 17.75−5.46 wt.%, BET surface area 373-757 cm2/g, while capacity 28.4–48.2 mg-H2S/g-sorb accordingly. Detailed characterization results (XPS, XRD, FTIR, TGA/DTA) reveal correlation with doped species porosity, area/volumetric density is crucial. observation corroborated kinetic studies fitting adsorption isotherms Langmuir Dubinin-Radushkevich isotherm (DR) isotherms. independent CO2 concentrations examined (up 40 vol%) ZIF-8-derived sorbents, making them promising candidates for biogas.