沼气

Abstract(#br)A hollow fibre membrane contactor (HFMC) comprised of nonporous symmetric ultrathin wall polydimethylsiloxane (PDMS) fibres has been studied for biogas upgrading to establish if the ultrathin wall can enable low resistance to mass transfer coupled with enhanced selectivity for carbon dioxide (CO 2 ).

Abstract(#br)A study was conducted on hydrogen sulfide (H 2 S) removal from biogas using a novel hybrid polydimethylsiloxane (PDMS) membrane bioscrubber. The effect of absorption liquid pH, biogas flowrate and DO concentration on H 2 S selectivity, removal efficiency and sulfide oxidation were investigated. The process performance at pH 7 was better than pH 8.5 in terms of H 2 S removal capacity and selectivity. Desulfurization selectivity of H 2 S/CO 2 and H 2 S/CH 4 increased along with the increase of gas flowrate (32 l/d) and reached 3.5 and 63, respectively.

Abstract(#br)A commercial activated carbon (AC) was characterized by physicochemical methods. The AC adsorption/desorption properties and the adsorbent regenerability were evaluated for the removal of octamethylcyclotetrasiloxane (D4), a common siloxane impurity in biogases. In situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) was employed to investigate the adsorption of D4 on AC at room temperature and its thermodesorption up to 300\u003cce:hsp sp=\"0.25\"/\u003e°C.

AbstractA study was conducted on hydrogen sulfide (H2S) removal from biogas using a novel hybrid polydimethylsiloxane (PDMS) membrane bioscrubber. The effect of absorption liquid pH, biogas flowrate and DO concentration on H2S selectivity, removal efficiency and sulfide oxidation were investigated. The process performance at pH 7 was better than pH 8.5 in terms of H2S removal capacity and selectivity. Desulfurization selectivity of H2S/CO2 and H2S/CH4 increased along with the increase of gas flowrate (32 l/d) and reached 3.5 and 63, respectively.