Journal
INDUSTRIAL CROPS AND PRODUCTS
Volume 153, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.indcrop.2020.112513
Keywords
Macroalgae; Alcoholic solvent; Formic acid; Catalytic liquefaction; Bio-oil
Categories
Funding
- National Natural Science Foundation of China [21477167, 21806194, 31902419]
- Science and Technology Research Plan Program of Henan Province [172102310712, 182102311110, 192102110084, 202102310268]
- Natural Science Research Program Foundation of High Education Schools of Henan Province [17B610009, 15A520114]
- Opening Project of Henan Province Key Laboratory of Water Pollution Control and Rehabilitation Technology [CJSZ2018004]
- Doctoral Program of Zhoukou Normal University [ZKNU2014118]
- School-Based Program of Zhoukou Normal University [zknu B2201606, zknuB3201715, zknuB315213]
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Catalytic Hydrothermal liquefaction (HTL) of Ulva lactuca (UL) macroalgae over various amount of formic acid (FA) with solvents (water, ethanol and methanol) at different reaction temperatures (260, 280 and 300 degrees C), reaction holding times (15, 30 and 45 min.) with acidic ZSM-5 and basic MgO catalyst were investigated. Without catalyst, the maximum bio-oil yield was obtained 43.8 wt.% in ethanol-FA mixture at 280 degrees C for 30 min reaction time. However, the maximum bio-oil (55.2 wt.%) was obtained with basic metal MgO catalyst in the ethanol-FA solvent mixture compared to the acidic ZSM-5 catalyst (48.7 wt.%). When ethanol solvent used with MgO and ZSM-5 catalyst, the highest bio-oil yield 46.7 and 48.7 wt.% were observed. Selectively higher derivatives of hydrocarbon compounds were obtained with MgO in ethanol-FA solvent. However the phenolic compounds majorly were found with ZSM-5 catalyst. The higher carbon (69.5 %) and higher high heating value (HHV) (35.8 MJ/kg) was observed in case of MgO catalytic HTL bio-oil compared to the other HTL bio-oil. The use of catalysts in HTL increased the boiling point range of bio-oil and the higher boiling point range was observed in case of MgO and ZSM-5 catalytic bio-oil.
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