Chen J.,Fujian Refining and Petrochemical Co. |
Tang L.,Fujian Refining and Petrochemical Co.
Petroleum Processing and Petrochemicals | Year: 2013
The commercial application of RN-32V catalyst in the 2. 3 Mt/a hydrotreating unit of Fujian Refining and Petrochemical Company was introduced processing feedstock containing deasphalted oil (DAO) and coker gas oil (CGO), which was high in asphaltene, carbon residue and metal contents, as well as with high FBP. The assessment of performance at the initial stage showed that using RN-32V catalyst, under the process conditions of a hydrogen partial pressure of 14. 04 MPa, an average catalyst bed temperature of 384. 6 °C and LHSV of 1. 11 h-1 , the sulfur and nitrogen contents of the treated feed dropped significantly, which improved the feed quality for FCC unit. Source
Liu H.,Fujian Refining and Petrochemical Co. |
Jiang Z.,Fujian Refining and Petrochemical Co. |
Lin B.,Fujian Refining and Petrochemical Co.
Petroleum Refinery Engineering | Year: 2013
The 3rd-generation low pressure continuous catalytic reforming and regeneration technologies developed by UOP have been applied in the continuous catalytic reforming unit of aromatic complex of Fujian Refining and Petrochemical Co., Ltd. The unit is designed at a capacity of 1. 4 million tons per year. In the start-up after overhaul, because the level gauge in pre-hydrogenation stripper's (C101) didn't work properly, the stripper was flooded, resulting in the loss of C101 separation efficiency. A large amount of high-sulfur high-water naphtha flowed into the reforming reaction system, leading to severe sulfur poisoning of catalyst PS-VI. The measured H 2S in reformer recycle hydrogen was up to 56 mg/L. After sulfur poisoning was found, the C101 operation was first stabilized by the calibration of C101 level gauge to ensure the required specifications of reformer feed. In addition, the injection of chlorine was increased to inhibit the reversible absorption of sulfur. The H2S in the recycle hydrogen was reduced to 4 mg/L through the low-load hot hydrogen desulfurization and the hot hydrogen desulfurization of catalyst circulation. Ultimately, the H2S was further reduced in the low-load coke burning in the regeneration. 17 days after sulfur poisoning, the H2S in recycle hydrogen was reduced to lower than 0. 5 mg/L. The activity of the catalyst was basically restored to the level before poisoning. Source
Zhao K.,Fujian Refining and Petrochemical Co. |
Cai Y.,Fujian Refining and Petrochemical Co. |
Liu H.,Fujian Refining and Petrochemical Co.
Petroleum Refinery Engineering | Year: 2014
1-350 C8 dimethyl benzene isomerization catalyst developed by UOP was commercially applied in the xylene isomerization unit at Fujian Refining & Petrochemical Co., Ltd. (FRPC) to replace the original EB conversion catalyst for expanding the unit capacity. The properties of 1-350 catalyst, isomerization reactor revamping, catalyst loading & passivation and performance tests are introduced. The performance test results showed that 1-350 catalyst exhibited good catalytic performances, the conversion of ethylbenzene reached 66. 8%, the isomerization activity of xylene reached 23. 1%, and the C8 aromatic loss was 1.5%. It indicates that the catalyst offers good conversion performance of ethylbenzene, high isomerization performance and good selectivity. After replacement of the catalyst, the PX concentration in the feed of the Parex unit and the production of PX and benzene and dry gas of the deheptanizer overhead were obviously raised, achieving the objectives of expanding capacity and reducing consumption of the aromatics complex. The causes why the isomerization activity of xylene is lower than the guarantee value is analyzed. Optimization measure are recommended, such as addition of a line from raffinate column overhead to reformate splitter, reduction of the speed of the recycle compressor, optimization of the operation of deheptanizer, shutdown of separator pumps, revamping of dry gas process and improvement of hydrogen supply process, etc. Source