A quantitative kinetic model for the fast and isothermal hydrothermal liquefaction of Nannochloropsis sp.

作者：Hietala David C; Faeth Julia L; Savage Phillip E

来源：Bioresource Technology, 2016, 214: 102-111.

DOI：10.1016/j.biortech.2016.04.067

• Hydrothermal liquefaction
• Microalgae
• Kinetic model
• Temperature profile

Hydrothermal liquefaction (HTL) is a technology for converting algal biomass into biocrude oil and high-value products. To elucidate the underlying kinetics for this process, we conducted isothermal and non-isothermal reactions over a broad range of holding times (10 s-60 min), temperatures (100-400 degrees C), and average heating rates (110-350 degrees C min(-1)). Biocrude reached high yields (>= 37 wt%) within 2 min for heat-source set-point temperatures of 350 degrees C or higher. We developed a microalgal HTL kinetic model valid from 10 s to 60 min, including significantly shorter timescales (10 s-10 min) than any previous model. The model predicts that up to 46 wt% biocrude yields are achievable at 400 degrees C and 1 min, reaffirming the utility of short holding times and "fast"HTL. We highlight potential trade-offs between maximizing biocrude quantity and facilitating aqueous phase recovery, which may improve biocrude quality.

• 出版日期2016-8