Hydrothermal gasification performance of Enteromorpha intestinalis as an algal biomass for hydrogen-rich gas production using Ru promoted Fe-Ni/gamma-Al2O3 nanocatalysts

作者：Norouzi Omid; Safari Farid; Jafarian Sajedeh; Tavasoli Ahmad; Karimi Ali

来源：Energy Conversion and Management, 2017, 141: 63-71.

DOI：10.1016/j.enconman.2016.04.083

• Algal biomass
• Hydrothermal gasification
• Hydrogen production
• Nickel
• Iron

Supercritical water gasification (SCWG) of Enteromorpha intestinalis (E. intestinalis) as a major algal biomass of southern coast of Caspian Sea was investigated in a batch reactor with and without the catalyst, to determine its potential for hydrogen production. The highest hydrogen yield of 5.25 (mmol H-2/g of E. intestinalis) was observed for the noncatalytic test in the temperature of 440 degrees C, water loading of 6 g, E. intestinalis loading of 0.06 g and reaction time of 10 min. All catalytic tests were performed in this condition in the presence of unpromoted and ruthenium promoted Ni-Fe/gamma-Al2O3 nanocatalysts. Catalysts were prepared with 12 wt.% of Ni and 6 wt.% of Fe in the active phase and 0.5-2 wt.% of Ru as a promoter via microemulsion technique. Nanocatalysts were characterized by ICP, BET, XRD, H-2 chemisorption, and TEM techniques to recognize their physicochemical properties. According to catalyst characterizations, the promoted Ni-Fe/gamma-Al2O3 with 2 wt.% Ru with higher dispersion and smaller size of nickel on gamma-Al2O3, showed the best performance during SCWG of E. intestinalis. The maximum 1-12 yield of 12.28 (mmol H-2/g of E. intestinalis) and hydrogen selectivity of 0.74, were obtained by using this optimized catalyst.

• 出版日期2017-6-1