Bio-oil production from microalgae through lignite assisted microwave pyrolysis as novel absorber

Bio-oil from microalgae has undergone changes from the first generation to the third generation. Microalgae are third-generation bio-oil producers which have advantages over other bio-oils. This study aims to determine the yield and quality of bio-oil from microalgae through microwave pyrolysis with lignite as an absorber. The microalgae used are Chlorella vulgaris and lignite can be used as an absorber and can contribute to increasing the thermal decomposition results. Microwave pyrolysis was operated under vacuum (-10 mmH2O) and the process temperature was 500 °C. Process variables that directly contribute to the increase in yield and quality of bio-oil include the ratio of lignite to microalgae, pyrolysis time, and microwave input power. The resulting bio-oil product will be characterized by FTIR, GC-MS, density and viscosity. The ratio of microagla to coal which gives a maximum yield is 4:6 with an input power of 450 watts and a reaction time of 60 minutes which gives an optimal yield of 40%. The results of this study are expected to provide an alternative use of bio-oil and lignite as an absorber.

从第一代到第三代，微藻生物油经历了质的飞跃。微藻作为第三代生物油生产者，相较于其他生物油具有显著优势。本研究旨在通过以褐煤为吸收剂进行微波裂解，确定微藻生物油的产量与品质。所使用的微藻为小球藻（Chlorella vulgaris），褐煤不仅可用作吸收剂，而且有助于提升生物油的热分解效果。微波裂解在真空环境（-10 mmH2O）下进行，过程温度设定为500°C。直接影响生物油产量与品质的提升的因素包括褐煤与微藻的比例、裂解时间和微波输入功率。所得生物油产品将通过傅里叶变换红外光谱（FTIR）、气相色谱-质谱联用（GC-MS）、密度和粘度进行表征。微藻与煤炭的最佳比例以实现最大产量为4:6，输入功率为450瓦，反应时间为60分钟，从而获得40%的最优产量。本研究预期将为生物油和褐煤作为吸收剂提供一种替代用途。