Study of Fe‐Ni‐Mg catalytic activities for hydrogen‐rich gas production from biomass pyrolysis

Abstract

We investigate the various roles of MgO in Fe-Ni-Mg catalytic system in the catalytic pyrolysis of pine needle biomass in a fixed bed reactor. And the change of productions was discussed to reveal the various roles of MgO at 750 C. We found that in the presence of MgO, hydrogen content was enhanced. And the variation in the Mg/3 Fe 1 Ni mass ratios indicated that MgO could act as a promoter at 750 C, and a catalyst at Mg/3 Fe 1 Ni ratio of <1, and >1, respectively. Moreover, the impact of temperature and heating rate for biomass pyrolysis with 3 Fe 1 Ni 0.4 Mg catalyst were studied. Firstly, as the temperature changed from 450 C to 750 C, hydrogen increases from 40.70 mL/g to 120.98 mL/g. Secondly, when the heating rate was 10 C/min, the gas yield reached the maximum value of 34.27%. At the same time, the content of hydrogen product was also the maximum, 120.98 mL/g, a possible mechanism of biomass pyrolysis with Fe-Ni-Mg catalytic system is proposed. The surface characteristics of 3 Fe 1 Ni, 3 Fe 1 Ni 0.4 Mg and 3 Fe 1 Ni 4 Mg catalysts were analyzed with XRD, SEM, and TEM. XRD results indicated that Fe-Ni alloy was formed during high temperature, which contributed to the enhancement of hydrogen. These findings manifested that Fe-Ni-Mg catalyst can be used as low-cost catalyst to enhance hydrogen.

Biochar as a catalyst in the production of syngas and biodiesel from peanut waste

“…Figure 3 showed that CO was evolved from pyrolysis of PWR at ≥300°C, and the evolution of CO could be ascribed to deoxygenation from a polymeric backbone of PWR 40 . One of the interesting observations is that CO formation by means of deoxygenation lasted even at ≥500°C.…”

“…Figure 3 showed that CO was evolved from pyrolysis of PWR at ≥300 C, and the evolution of CO could be ascribed to deoxygenation from a polymeric backbone of PWR. 40 One of the interesting observations is that CO formation by means of deoxygenation lasted even at ≥500 C. Such observation offers two important messages. First, the continuous mass changes observed from the TGA tests of PW and PWR (Figure 2) at ≥500 C are ascribed to CO evolution through deoxygenation.…”

Valorization of sawdust biomass for biopolymer extraction via green method: Comparison with conventional process

“…This is an advantage for bioplastic products because it mitigates the problems of climate change and global warming. 7 Additional to bioplastics, valorization of organic biomass can led us to obtain sustainable and valuable materials, such as crosslinking agents, chemicals and fuels, 8 for example, raw materials for bio-hydrogen production, 9 solar cells, 10 wastewater treatment 11 and solar-steam-assisted desalination, 12 to name a few. In fact, biomass also has great potential in the functional materials field of high performance.…”