抄録
Among the various residue upgrading processes in use, conventional hydrodesulfurization (HDS) units operated at elevated temperatures are widely employed for cracking of inferior crudes with a high metal content, such as Middle East or South American crude. Such a high-temperature operation results in inducing dry sludge formation in product oil and maximum conversion is regulated by that limitation. With a combination of hydrovisbreaking and hydroconversion by asphaltene bottom cracking (ABC) catalyst the maximum conversion was improved by as much as 15% for inferior crudes. The advantage of the higher conversion was proved by characterizing the reaction mechanism in the process. And, the reaction mechanism model and prediction model for compatibility of product oil proposed for the prediction of maximum conversion will also be a tool for optimizing various types of residual hydroconversion processes.
