Hydrotreatment of bio-oil distillates produced from pyrolysis and hydrothermal liquefaction of duckweed: a comparison study.

Release Time:2025-04-30  Hits:

• Date:2025-04-30
• Title of Paper:Hydrotreatment of bio-oil distillates produced from pyrolysis and hydrothermal liquefaction of duckweed: a comparison study.
• Journal:Science of the Total Environment, 2018, 636, 953-962.
• Summary:Supercriticalwater gasification (SCWG) of themicroalga Chlorella pyrenoidosawas examinedwith a catalyst mixture
  of Ru/C and Rh/C in a mass ratio of 1:1. The influences of temperature (380–600 °C), water density (0–
  0.197 g/cm3), and catalyst loading (0–20wt%) on the yields and composition of the gaseous products and the gasification efficiency were examined. The temperature and water density significantly affected the SCWG of the
  microalgae. The hydrogen gasification efficiencywasmore dependent on the temperature,while the carbon gasification efficiency wasmore dependent on the water density. The gaseous products mainly consisted of CH4, H2,
  CO, and CO2, with smaller amounts of C2-C3 hydrocarbons. CH4 made up half of the mole fraction of the gaseous
  products undermost reaction conditions. A synergistic effect between Ru/C and Rh/C existed during the SCWGof
  themicroalgae, and this effect favored the production of CH4. The role of the catalystmixture becameindistinct at
  higher temperatures. Hydrogen atoms from the water were transferred to the gaseous products during the
  SCWG, leading to hydrogen gasification efficiencies that exceeded 100%. The main components of the bio-oil
  were aromatics and nitrogen-containing compounds, and the main aromatics consisted of azulene and anthracene.
  The nitrogen-containing compounds are potential poisons to the catalyst mixture.
• Co-author:Feng Wang, Ye Tian, Caicai Zhang, Yuping Xu, Peigao Duan*.
• Translation or Not:No
• Date of Publication:2018-02-19