| In order to provide a reference for the preparation of bio-based fuel oil by oil cracking catalyzed with solid base catalyst, the Mg-Al hydrotalcite was prepared by co-precipitation method, and then was calcined. The calcined Mg-Al hydrotalcite was used as catalyst to produce bio-based fuel oil by oil cracking.The catalyst was characterized by XRD, FT-IR and electron microscope, and its catalytic performance was evaluated by analyzing the yield, acid value and saponification value of liquid product produced by oil cracking. In addition, the composition of the liquid product was analyzed. The results showed that under the conditions of cracking temperature 470℃and ratio of magnesium to aluminum in catalyst 3∶1, the yield of liquid product(60.20%) was higher, the acid value (1.1 mgKOH/g)and saponification value(9.3 mgKOH/g) of liquid product were lower. The optimal using times of catalyst were 5. The contents of alkanes and olefins in the liquid product were higher when the ratio of magnesium to aluminum in the catalyst was 3∶1. Although part of the structure of calcined Mg-Al hydrotalcite was destroyed, it still had high crystallinity and alkali activity, which improved the quality of bio-based fuel oil to a certain extent. |
