Product characterization of multi-temperature steps of hydrothermal liquefaction of Chlorella microalgae. Algal Research-Biomass Biofuels and Bioproducts
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Product characterization of multi-temperature steps of hydrothermal liquefaction of Chlorella microalgae. Algal Research-Biomass Biofuels and Bioproducts
- 发表刊物：
- Algal Research
- 摘要：
- Hydrothermal liquefaction (HTL) is a promising technique for crude bio-oil (biocrude) production from microalgae. Instead of traditional direct HTL at one temperature with a residence time, the present work explored two temperature steps (TTS) and more temperature steps (MTS) of microalgae (Chlorella) HTLs for the first time in mini-batch reactors. Specifically, the reactions for the TTS of HTL were performed at a relatively low temperature (150–300 °C) for 10–40 min and then at a high temperature (350 °C) for 10–20 min. In the MTS of HTL, three or four temperature steps were adopted and each temperature stage (within 150–300 °C) was kept for 10 min. The results show that the low temperature pre-reaction stage significantly affected the yield, elemental composition, higher heating value, energy recovery and molecular component of biocrude. The biocrude derived from the TTS of HTL of 250*20–350 (i.e., a pre-reaction at 250 °C for 20 min followed by a HTL at 350 °C for 10 min) had the highest H content (9.00 wt%) and the lowest S content (0.55 wt%). Its yield, elemental composition, higher heating value, and energy recovery were comparable with those of the biocrude from the direct HTL at 350 °C for 30 min (with the highest yield and the best quality in tests). In comparison to direct HTL, a proper TTS of microalgae HTL was able to reduce reaction temperature on the premise of ensuring similar biocrude properties, so might be applicable in the algal bio-oil production.
- 合写作者：
- Zhen He, Donghai Xu, Liang Liu, Yang Wang, Shuzhong Wang, Yang Guo, Zefeng Jin
- 是否译文：
- 否
- 发表时间：
- 2018-03-10