| abstract |
Disclosed is a method and a system for preparing fuel by using high acid value biological oil and fat, comprising sequentially performing pyrolysis and deoxygenation, catalytic cracking and deoxygenation, and catalytic hydrodeoxygenation on high acid value biological oil and fat to process the high acid value biological oil and fat. The method and the system can gradually deoxidize and reduce the acid value of the raw high acid value biological oil and fat, to prepare a clean fuel having the same fuel components as those obtained from crude oil refining or direct hydrodeoxygenation of biological oil and fat. |