Journal
FUEL
Volume 323, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2022.124329
Keywords
Sewage sludge; Hydrothermal liquefaction; Co-Mo; ATP; Bio-oil; Mechanism
Categories
Funding
- Natural Key Research and development program of China [2018YFE0106400]
- Na-tional Natural Science Foundation of China [41907329]
- College Students innovation and Entrepreneurship Training Program [202010060093]
Ask authors/readers for more resources
The study found that Co-Mo/attapulgite catalyst could improve bio-oil yield and selectivity during hydrothermal liquefaction of sewage sludge, while also increasing the content of hydrocarbons in bio-oil. Catalytic HTL also led to higher carbon recovery, further enhancing energy efficiency.
In this study, Co/gamma-Al2O3, Co-Mo/gamma-Al2O3, Co/attapulgite (ATP) and Co-Mo/ATP catalysts were prepared and applied for hydrothermal liquefaction (HTL) of sewage sludge (SS) to produce bio-oil. The properties of the catalysts were characterized by various techniques (N2 physisorption, ICP, XRD and XPS). The mesoporous nature of synthesized catalysts was conformed. Beside, Co2+ and Mo6+ particles were responsible as the major active species for catalytic HTL reactions. The effect of carrier and metal type, loading of catalyst on product yields and composition of bio-oil was studied. The highest bio-oil yield of 31.36 wt% was achieved in the presence of 10 wt% catalyst loading. The main components of bio-oil were phenols, N-containing compounds and hydrocarbons, and the increased selectivity to hydrocarbons with Co-Mo/ATP was observed. Meanwhile, TGA results showed that Co-Mo/ATP increased the low boiling point fraction (< 410 degrees C) of bio-oil to 81.19 wt%. Additionally, catalytic HTL of SS resulted in higher carbon recovery, increasing from 55.61 to 92.24 wt%. Finally, the potential reaction mechanism of the catalysts on HTL of SS was proposed. Overall, this study provides valuable information for bio-oil production from sewage plant and further HTL implementation with ATP based catalyst, improving energy efficiency and alleviating the energy shortage.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available