Hydrogen-rich syngas production form biomass char by chemical looping gasification with Fe/Ca-based oxygen carrier

Enhanced hydrogen production via assisted biomass gasification using lithium manganate as a bifunctional material

“…Moreover, given that the formation of CH 4 increased in the samples with higher H 2 production, a methanation process (reaction (11)) must be involved. 70,71 2H 2(g) + C (s) / CH 4(g) (11) Complementarily, it was necessary to elucidate the effect of lithium, determining if the described behaviors were only related to the catalytic effect of manganese or also the properties of lithium. It must be mentioned that lithium oxide (Li 2 O) was not complementarily tested due to its high corrosivity and toxicity levels, which would discourage its use.…”

“…However, the increase in H 2 production and high temperatures in the presence of carbon induced a weak methanation reaction. 70,71 Based on all these results, it was indirectly determined that the presence of lithium in the crystal structure of Li 2 MnO 3 did promote higher H 2 production, obviously resulting in CO x capture, and thus better H 2 /CO x selectivity.…”

A Review on Synthesis, Properties, and Environmental Application of Fe-Based Perovskite

“…Liu et al have synthesized a series of compounds [CaMnO 3 , CaFeO 3 , and CaMn 1 -xFe x O 3 ] using the sol-gel method. Citric acid was used as a gelling agent and glycol was added to obtain composition homogeneity and to avoid segregation [18]. Aziz et al studied the synthesis of GdxMn1−xFe1−yCuyO 3 nonmaterials by sol-gel autocombustion route [19].…”

Biomass Chemical Looping Gasification Performance of a Ce-Modified BaFe2O4 Oxygen Carrier

“…Among them, Mn is cheap and easy to obtain, but the activity is low and easy to sinter, which affects the cycle performance and service life of the OC, and Co has a multivalent state and fits better with Fe but is expensive. However, numerous studies have shown that enhanced adsorbent OCs, mainly CaFe 2 O 4 , Ca 2 Fe 2 O 5 , BaFe 2 O 4 , etc., have obvious advantages in the BCLG reaction, and many experts and scholars have done a lot of research in this regard. Chen et al investigated the gasification properties of MFe 2 O 4 (M = Cu, Ba, Ni, and Co) spinel-type OC and found that BaFe 2 O 4 had the highest syngas yield and H 2 yield during the BCLG process.…”

“…mainly CaFe 2 O 4 ,24 Ca 2 Fe 2 O 5 ,25 BaFe 2 O 4 ,26 etc., have obvious advantages in the BCLG reaction, and many experts and scholars have done a lot of research in this regard. Chen et al27 investigated the gasification properties of MFe 2 O 4 (M = Cu, Ba, Ni, and Co) spinel-type OC and found that BaFe 2 O 4 had the highest syngas yield and H 2 yield during the BCLG process.…”