Hydrogen production with CO2 capture

Raw and steam exploded pine wood: Possible enhanced reactivity with gasification hydrogen

“…Dust flammability data is normally presented in terms of g/m 3 and Andrews and Phylaktou [17] showed that existing data, when converted into equivalence ratio, Ø, indicated that the published MEC for most dusts were very lean at ~0.2Ø for many HCO dusts compared with 0.4 for many hydrocarbon type dusts, which is close to the equivalent lean limits for gaseous hydrocarbons. It is considered that all data on dust explosions should be expressed in Ø terms, when this is done over the whole flammable range the Hartmann and ISO 1 m 3 explosion equipment results show that extremely rich mixtures are reported as flammable in the literature [23].…”

“…Steam reforming of coal and biomass can be used for the production of hydrogen and if the CO is converted to CO2 and the total CO2 solvent extracted and captured, then low carbon hydrogen can be generated from coal or biomass [3][4][5]. In the combustion of rich mixtures of biomass, as studied in this work, the equilibrium products are essentially those of a gasification process with high CO and H2 [6].…”

“…A typical stoichiometric A/F for wood is 6/1 kg/kg and this converts to 200 g/m 3 . The ratio of this stoichiometric A/F ratio to actual A/F is the equivalence ratio, Ø.…”

Biotechnological application of microbial sulfidogenesis at haloalkaline conditions

“…However, the CO concentration in the syngas varies considerably depending on the feedstock used and production method, from 0 up to higher than 50% (Guan et al, 2016;Voldsund et al, 2016). Even though inhibition effects were observed during the spike of 60% CO performed in this study, such spikes can be controlled by a proper production of syngas or pre-treatment of syngas (Voldsund et al, 2016).…”

“…However, the CO concentration in the syngas varies considerably depending on the feedstock used and production method, from 0 up to higher than 50% (Guan et al, 2016;Voldsund et al, 2016). Even though inhibition effects were observed during the spike of 60% CO performed in this study, such spikes can be controlled by a proper production of syngas or pre-treatment of syngas (Voldsund et al, 2016). Thus, despite that using syngas without removing CO would decrease the cost of the electron donor, the capacity of biomass to withstand CO fractions only up to 15% might make the application of bleed stream treatment using syngas and recycling an interesting option for biodesulfurization systems (Figure 9).…”