Calcium looping gasification for high-concentration hydrogen production with CO2 capture in a novel compact fluidized bed: Simulation and operation requirements

Effect of CaO on tar reforming to hydrogen-enriched gas with in-process CO2 capture in a bubbling fluidized bed biomass steam gasifier

“…Calcium oxide (CaO) is acknowledged as a CO 2 sorbent to produce hydrogen-rich gas [16e18, 22,23] in biomass gasification for hydrogen production. This option has currently gained a broad attention due to the low cost and abundance of CaO [3,24]. The CaO can play the vital roles of not only CO 2 sorbent as mentioned above, but also of tar reforming catalyst [24].…”

“…Some important reactions related to the use of CaO in biomass steam gasification for production of hydrogenenriched gas are summarized in Table 2. Removing CO 2 from the gasification reaction as soon as it is formed alters the equilibrium composition of the produced gas and promotes the production of gas rich in hydrogen [3]. Similarly, the catalytic reforming of tar not only reduces the tar amount in the product gas but also enhances the total gas and hydrogen yields [1,25].…”

Thermodynamic analysis of synergistic coal gasification using blast furnace slag as heat carrier

“…Meanwhile, an inevitable drawback of this process was the H2/CO ratio higher than 3.0, which was higher than the needed ratio of the Fishcer-Tropsch process [8][9]. Many researchers had performed numerous investigations on gasification reaction with CO2 [10][11][12][13]. Although a large amount of CO2 could be absorbed in the gasification process, the gasification reactivity was found to depend on reaction temperature strongly.…”

Steam reforming of biomass tar model compound at relatively low steam-to-carbon condition over CaO-doped nickel–iron alloy supported over iron–alumina catalysts

“…Furthermore, calcium oxide (CaO) is widely known to be a CO 2 sorbent, assisting the production of hydrogen-rich gas [40,41] in biomass gasification for hydrogen production. This option has recently gained tremendous attention due to the low cost and abundance of CaO [42,43]. CaO can play the vital roles of not only CO 2 sorbent, but also tar reforming catalyst [43].…”

“…CaO can play the vital roles of not only CO 2 sorbent, but also tar reforming catalyst [43]. Removing CO 2 from the gasification reaction as soon as it is formed alters the equilibrium composition of the produced gas and promotes the production of gas rich in hydrogen [42]. In steam reforming of ethanol, the addition of CaO to Ni catalyst could prevent the formation of crystalline carbon which is more difficult to be removed, resulting in higher catalyst stability.…”