Catalytic gasification of Enteromorpha prolifera for hydrogen production in supercritical water
Release time:2023-05-16 Hits:
DOI number:10.1016/j.psep.2023.05.027
Journal:Process Safety and Environmental Protection
Abstract:This study investigated the effects of the reaction parameters on the supercritical water gasification (SCWG) of Enteromorpha prolifera for producing hydrogen-rich syngas and evaluated the hydrogen production performance of four commercial catalysts (KOH, Ni, K2CO3, AlCl3) and their combinations. A higher temperature, a longer reaction time, and an appropriate moisture content were found to contribute to a higher hydrogen yield. The maximum H2 yield (19.5 mol/kg OM, which was 145 times higher than that without catalyst) was achieved at 400 °C, 30 min, 95% moisture content, and 10 wt% AlCl3 loading. The catalytic performance of the catalysts followed the order AlCl3 > KOH > K2CO3 > Ni. Due to the limited range of composite ratios explored in this study, the H2 yield obtained with the combined catalyst was slightly lower compared with that achieved with the individual addition of KOH or AlCl3. The addition of AlCl3 could promote biomass decomposition and increase hydrogen production via the steam reforming reaction, while the combination with H2O2 also promoted the degradation and gasification of organics, and further increased the total gas yield. The results suggest that AlCl3-catalyzed SCWG could be a potentially applicable approach for the conversion of Enteromorpha prolifera to hydrogen-rich syngas.
Volume:175
Issue:0
Page Number:227-237
Translation or Not:no
Date of Publication:2023-05-16
Included Journals:SCI
Links to published journals:https://www.sciencedirect.com/science/article/pii/S0957582023003956
