In this study, biomasses of microalgae Scenedesmus and Synechocystis species were thermochemically converted to biofuel in a fast pyrolysis process. The effect of pyrolysis temperature on the products yield was investigated. The optimal pyrolysis temperature for Scenedesmus and Synechocystis biomass was 500 °C and 600 °C, respectively, resulting in higher bio-oil yield of 35.3 wt% and 21.1 wt%. The produced bio-oil had higher high heating value (HHV) (35–40 MJ/kg) than that of beech wood source bio-oil (23–35 MJ/kg). The obtained biochar had low surface area but with considerable nitrogen, phosphorus, and other mineral content was suggested as fertilizer. It was concluded that the microalgae type and its cultivation and harvesting method affects the characteristics of the products and final energy efficiency as well. Energy efficiency assessment showed that the technology needs to be improved substantially to reduce the energy demand in cultivation, harvest, and pyrolysis step to be energy efficient.

在这项研究中，微藻生物质的栅藻和蓝藻的物种进行了热化学转化为生物燃料的快速热解过程。研究了热解温度对产物收率的影响。场景藻和集胞藻的最佳热解温度生物质分别为500°C和600°C，导致更高的生物油收率35.3 wt％和21.1 wt％。产生的生物油具有比山毛榉木源生物油（23–35 MJ / kg）更高的高热值（HHV）（35–40 MJ / kg）。所获得的生物炭表面积低，但氮，磷和其他矿物质含量较高，建议用作肥料。结论是，微藻的类型及其培养和收获方法会影响产品的特性和最终的能源效率。能源效率评估表明，需要大幅改进该技术，以减少种植，收获和热解步骤中的能源需求，以实现能源效率。