Biocatalytic methanation of hydrogen and carbon dioxide in a fixed bed bioreactor

Performance enhancement of biological methanation with trickle bed reactors by liquid flow modulation

“…In these studies, methane contents of up to 98 vol‐% were achieved. For alternative reactor concepts, methane contents higher than 90 vol‐% (fixed‐bed systems) (Alitalo, Niskanen, & Aura, ) and 85 vol‐% (CSTR systems) (Seifert et al., ) are reported. Compared to these results, the chosen set‐up of this study led to very high conversion rates of the injected source gases.…”

“…In these studies, methane contents of up to 98 vol-% were achieved. For alternative reactor concepts, methane contents higher than 90 vol-% (fixed-bed systems) (Alitalo, Niskanen, & Aura, 2015) and 85 vol-% (CSTR F I G U R E 2 Gas quality of the product gas depending on the different modulation strategies. The significant differences among the modulation strategies are marked with different alphabets (p < 0.05, Tukey's test) F I G U R E 3 The influence of different modulation strategies on product gas quality.…”

Biological CO2-Methanation: An Approach to Standardization

“…This fact becomes apparent in Table 1 which summarizes indications and units used to describe the methane production rate of trickle-bed reactor (TBR) systems. Most authors use 'methane productivity' [33][34][35] or the German equivalent 'Methanbildungsrate' [36][37][38] but nine other indications were found as well [33,35,36,[39][40][41][42][43][44]. The heterogeneity of units for this parameter is even bigger: in total, 25 different units were identified for the same parameter with some authors using more than one unit within the same manuscript.…”

“…Just for basic parameters and units there are no major differences. Some authors provide temperature in 'degree centigrade' [33,34,[36][37][38][42][43][44][45][46] and others in 'Kelvin' [35,40]. Regarding pressure, it is not always clear if absolute or relative pressure is given [33,[36][37][38]45] and some authors only state their values as 'ambient' [43,44,46] or 'atmospheric' [35,40] (see Table A1 in the Appendix A).…”

“…Methane production rate CH 4 production rate [39] CH 4 production [35,40] MBR [36] Methane formation [41] Methane evolution rate MER [47] Methane formation rate T [36][37][38] Methane productivity [33][34][35]48] Methane production rate [41,42,48] P [43] P CH4 [33,44,48] Specific methane production [43,44] l/(l*d) [45]; l/l reactor /d [34] l/l-reactor/h [41]; mL L −1 h −1 [49] Indices: 1 indication or 2 unit found in other literature than on trickle-bed systems (not comprehensive); 3 vague, which volume is meant (packing volume, net reactor volume, liquid volume, etc.). T terms from German references were translated into English language or (T) matched to the appropriate English term.…”