Abstract: In order to meet the needs of upgrading diesel fuel quality, based on analyzing the makeup and properties of hydrotreating feedstocks in Tianjin Petrochemical Corporation, considering the present status of hydrotreating units and integrating optimization of hydrotreating feedstocks, three technical options to upgrade the quality of diesel fuel were proposed. By comparing these options from the technical and economic aspects and based on the total investment plan of construction, technical option with establishing a 1.8 Mt/a hydrotreating unit for treating poor quality feedstocks mainly was chosen, which could be used to produce clean diesel fuel meeting the requirements of National Emission Standard IV and V.

Key words: diesel, hydrotreating, poor quality feedstocks, quality upgrade, technology program