Desulfurization and in situ tar reduction within catalytic methanation of biogenous synthesis gas

Sorbents Used for Biogas Desulfurization in the Adsorption Process

“…Desulfurization with ZnO resulted in H 2 S concentrations of approx. 3.5 ppm (parts per million, mg/L) throughout the analysis, while in the case of ZnO/CuO such a concentration of H 2 S was reached after 95 hours [29].…”

“…Oxide adsorbents such as ZnO and ZnO/CuO were also used by Kienberger et al [29], who have carried out the desulfurization process of tar at 350ºC. The authors demonstrated a high desulfurization efficiency using ZnO/CuO, wherein the concentration of H 2 S was at the ppb (parts per billion, µg/L) level.…”

Kinetic modeling of a combined tar removal and methanation reactor for biogenous synthesis gas at medium temperature conditions

“…To show the influence of catalyst deactivation long-term tests of 250 h have been performed. A more detailed description of the experimental setup of gasification, gas cleaning and analytic equipment can be found in [15] and [16].…”

“…Σ is calculated by considering the area loss of the axial temperature profile in the reactor from the start of the experiment to its end, in relation to the area loss determined with a non-reactive gas. Kienberger [16] explains the determination of Σ in detail.…”

Investigation of sulfidation and regeneration of a ZnO-adsorbent used in a biomass tar removal process based on catalytic steam reforming

“…In the process discussed in this paper, tar components are converted to the synthesis gas components H 2 and CO by catalytic steam-reforming with a commercial Nickel-catalyst. One huge advantage of this method is that the biomass tar is not removed from the synthesis gas stream, but converted into components that are useable downstream [8][9][10][11].…”