Effect of temperature (300–500 °C), carrier gas flow rate (0.2–0.8 L min⁻¹), and the heating rate (10–20 °C min⁻¹) on the final bio-oil production from the Salvinia auriculata (SA) and Ulva lactuca (UL) was optimized using response surface methodology (RSM), established by a central composite design (CCD). The maximum bio-oil yield from UL was 34.8%, reached at 500 °C, 0.2 L min⁻¹ nitrogen flow rate, and 10 °C min⁻¹ heating rate. However, in the case of SA feedstock, the highest bio-oil yield was 32.3% at 400 °C, 0.5 L min⁻¹ nitrogen flow rate, and 20 °C min⁻¹ heating rate. Both bio-oil samples contained saturated and unsaturated hydrocarbons; but the average hydrocarbon chain length in UL bio-oil (C₄–C₁₆) was relatively shorter than bio-oil from SA (C₆– C₂₄). The bio-oil from A. filiculoides exhibited higher HHV values than that of UL derived bio-oil due to its relative large carbon and hydrogen concentration and small oxygen content. Although both the bio-oils showed different heating values, the UL biooil had more appropriate properties, i.e. lower viscosity and density.

温度（300–500°C），载气流速（0.2–0.8 L min ^-1）和加热速率（10–20°C min ^-1）对Salvinia auriculata最终生物油产量的影响（SA）和Ulva lactuca（UL）使用通过中央复合设计（CCD）建立的响应面方法（RSM）进行了优化。UL的最大生物油产率为34.8％，在500°C，0.2 L min ^-1氮气流速和10°C min ^-1加热速率下达到。但是，对于SA原料，在400°C，0.5 L min ^-1氮气流量和20°C min ^-1的情况下，最高的生物油产率为32.3％加热速率。两种生物油样品均含有饱和和不饱和烃。但是UL生物油中的平均烃链长度（C ₄ –C ₁₆）相对短于SA中的生物油（C ₆ – C ₂₄）。由于其相对较高的碳氢浓度和氧含量以及较低的氧含量，A。filiculoides的生物油具有比UL衍生的生物油更高的HHV值。尽管两种生物油均显示出不同的热值，但UL生物油具有更合适的性能，即较低的粘度和密度。