棉籽油加氢脱氧制备第二代生物柴油

Preparation of the Second Generation Biodiesel via Hydrodeoxygenation of Cottonseed Oil

采用混捏与浸渍相结合的方法制备了Ni-Mo/γ-Al2O3催化剂,对催化剂进行了XRD,BET,TEM表征。以棉籽油为原料,正辛烷为溶剂,通过微型固定床反应器对Ni-Mo/γ-Al2O3催化剂的性能进行了评价。棉籽油经加氢饱和、加氢脱氧和加氢脱碳等反应得到C15～18的直链柴油烷烃,即第二代生物柴油。考察了不同液态空速、反应温度、反应压力下产物的质量收率及脱氧率。实验结果表明,适宜的反应条件为:反应压力4 MPa、反应温度360℃、液态空速1.00 h-1,在该反应条件下,产物生物柴油的质量收率为80.3%,脱氧率为99.2%。

A Ni-Mo/γ-Al2O3 catalyst was prepared by kneading and impregnation, and characterized by means of XRD, BET and TEM. Its activity in the hydrodeoxygenation of cotton oil dissolved in octane was evaluated in a fixed bed microreactor. The second generation biodiesel mostly contained C15-18 linear paraffins was obtained in the reactions through hydrogenation saturation, hydrodeoxygenation and hydrogenation decarburization. The effects of the reaction conditions such as LHSV, temperature and pressure on the reactions were investigated. Under the optimal conditions of reaction pressure 4 MPa, reaction temperature 360 ℃ and LHSV 1.00 h-1, the biodiesel yield and the deoxidation rate reached 80.3% and 99.2%, respectively.