Upgrading of Hydrothermal Liquefaction Biocrude from Algae Grown in Municipal Wastewater

摘要

Algae biocrude was treated with hydrogen in isoparaffin solvent (Soltrol~R 125) using metal c, supported on activated carbon for the production of biofuel. Four metal catalysts (platinum, ruthenium and cobalt) were tested at 350°C under the presenceof high pressure hydrogen, and all the experimen conducted at weight hourly space velocity of 0.51 g0i/gcat'h. Hydrogen-treated biocrude in the presi metal catalysts reduced its darkness, which could be the degradation and hydrogenation of melanoi components. In addition, hydrogen treatment with catalyst increased higher heating value and r viscosity and total acid number (TAN) of the biocrude. Furthermore, the use of ruthenium and p catalysts greatly enhanced the yield of hexadecane and octadecane in the hydrogen-treated liquids im heptadecane, which was favored in supercritical water treatment. Overall, using isoparaffin and m activated carbon catalyst for hydrogen treatment of biocrude was effective in improving the quality of b without leeching ofmetal. Instead, sulfur and additional metal (iron and nickel) was picked up from b originated from municipal wastewater treatment microalgae.