| 内容提要: |
Reaction pathways of microalgae Nannochloropsis sp. and macroalgae Sargassum sp. were investigated via hydrothermal liquefication (HTL). Experiments under different reaction temperatures were carried out Nannochloropsis sp. achieved highest bio-oil yield of 54.11% at 320℃ while Sargassum sp. gained highest bio-oil yield of 9.49% at 340℃. The bio-oil yield range appeared to be 39.05%~54.11% and 3.11%~9.49% separately. Elemental analysis assumed that carbon element contents were significant increased due to deoxidation and denitrification in HTL process. GC-MS combined with FT-IR were utilized to detected bio-oil composition and function groups. Amides, amines and N-heterocyclic compounds were major products. Aqueous phase compounds were clarified via GC-MS and gases products were detected via GC. Predicted reaction pathway network was inferred based on microalgae and macroalgae HTL products detects. Research illuminated that proteins related conversations performed a significant role in bio-oil generation pathways of both microalgae and macroalgae. These possible reaction pathways provided clues for improvement of algae HTL bio-oil and downstream utilization. |