Enhanced H2 production from steam gasification of biomass by red mud-doped Ca-Al-Ce bi-functional material

Sustainable Management of Forest and Building Wastes for Hydrogen- Rich Syngas from Catalytic Steam Gasification with Minimum CO₂ Emissions

“…At lower temperatures, the main product was CO with lower amounts of H 2 . Under these conditions, the principal reactions taking place were reactions ( 5), (7) and reverse water-gas shift (9). When the temperature was increased up to 750 °C, Table 3 clearly shows that the concentration of H 2 in product gas was significantly enhanced, those of CO 2 and CH 4 were also increased, whereas the concentration of CO was lowered.…”

“…This process leads to syngas with elevated hydrogen content and high energy density, as well as less tar production, in comparison to air gasification. [7][8] In order to eliminate tar, which affects the purity of syngas and causes severe operational problems, in situ catalytic treatment, or a two-stage pyrolysis/ gasification process, is usually applied. The latter offers additional advantages of higher gasification efficiency, through the use of a higher reactivity bio-solid and liquid and gaseous energy sources from pyrolysis.…”

Steam Gasification of Polyethylene Terephthalate (Pet) with Cao in a Bubbling Fluidized Bed Gasifier for Enriching H2 in Syngas with Response Surface Methodology (Rsm)

“…Among common metal oxides, CaO is qualified as in situ CO 2 capture sorbent, which is plentiful in nature and not prone to decompose (calcination temperature 900 • C, at 1 atm) as other metal oxides at gasification temperatures [5]. A multitude of previous studies have demonstrated that CaO in situ capture is capable of reducing CO 2 and tars as well as enhancing H 2 yields in steam gasification process [6][7][8][9][10][11][12][13][14][15].…”

“…For example, Salaudeen et al [11] utilized eggshell as the sorbent in sawdust steam gasification and obtained that increasing the mass ratio of eggshell in sawdust from 0.5 to 1 at 650 • C and steam to biomass mass ratio 1.2 could improve the hydrogen concentration from 56 ± 2.5 to 78 ± 3.6 vol% and reduce the CO 2 concentration from 14.6 ± 1.7 to 3.3 ± 0.4 vol%. Yan et al [12] observed the CaO based catalyst doped with CeO 2 and red mud could increase the cyclic stability of the material. Comparing with the decreasing gas yields catalyzed by pure CaO, the doped catalyst could keep the gas yields almost constant after 20 cycles.…”

Nickel–Cobalt Oxide Nanoparticle-Induced Biohydrogen Production

“…4 H 2 can be produced by electrolysis of water, photosynthetic H 2 evolution, industrial by-product reforming, and biofermentation. 5 The sophisticated types of equipment and high capital investment that are required for the previous three methods limited the possibility of industrial application. Researchers have been looking for a low-cost and easy-to-operate process to produce H 2 .…”