Direct hydrothermal liquefaction of undried macroalgae Enteromorpha prolifera using acid catalysts

作者：Yang Wenchao; Li Xianguo; Liu Shishi; Feng Lijuan^*

来源：Energy Conversion and Management, 2014, 87: 938-945.

DOI：10.1016/j.enconman.2014.08.004

• Enteromorpha prolifera
• Undried
• Liquefaction
• Bio-oil
• Acid catalysts

Direct liquefaction of macroalgae Enteromorpha prolifera without predrying treatment was performed in a batch reactor. Effects of temperature, reaction time, biomass-to-water ratio and acid catalysts (sulfuric acid and acetic acid) on liquefaction products were investigated. Raw material and liquefaction products were analyzed by elemental analysis, Fourier transform infrared (FT-IR) and gas chromatography-mass spectrometry (GC-MS). Results showed that liquefaction at 290 degrees C for 20 min with 1:3 biomass-to-water ratio produced the highest bio-oil yield of 28.4 wt%, and high heating value (HHV) was 29.5 MJ/kg. Main components of bio-oil were fatty acids, ketones, alkenes and 5-methyl furfural, and main components of water soluble organics (WSOs) were pyridines, carboxylic acids and glycerol. In the bio-oil obtained with acid catalysts, content of ketones significantly increased while alkenes disappeared. Content of 5-methyl furfural also increased. Flow property of bio-oils was improved in the presence of acid catalysts. Moreover, esters were formed when adding sulfuric acid.

• 出版日期2014-11
• 单位中国海洋大学