Xu C.,Shtar Science and Technology Group |
Cai H.,Taizhou Entry Exit Inspection and Quarantine Bureau |
Zhang X.,China University of Petroleum - East China
Petroleum Processing and Petrochemicals | Year: 2010
A novel modification agent, emulsified SBS, was developed to prepare modified asphalt emulsion. The effect of emulsifier dosage on the storage stability of modified asphalt emulsion was studied and the results showed that the optimum emulsifier dosage was 1%. By investigating the effect of emulsified SBS dosage on the softening point, ductility and penetration of modified asphalt emulsion, an optimum emulsified SBS dosage of 6% was obtained. It was shown by the analysis results of optical microscope that when the particle size and density of the particles of SBS and asphalt were similar, the SBS particles could be dispersed uniformly in the system. Based on the above optimum dosages of emulsifier and modification agent, a modified asphalt emulsion having excellent performance was prepared.
Zhang Y.,China University of Petroleum - East China |
Ye T.,China University of Petroleum - East China |
Sun Y.,Shtar Science and Technology Group
Speciality Petrochemicals | Year: 2011
The olefin content of FCC (fluid catalytic cracking)gasoline was reduced by a liquid-liquid phase and high efficiency catalytic oxidation system containing heteropolyphosphatotungstate Q3 [PO4 (WO3)4] (Q=[C16H33NMe3]+ +[C18H37NMe3]+) and hydrogen peroxide. It was shown that the catalytic system made the olefin content of FCC gasoline decrease by 23.58% under the optimal reaction conditions, i.e., the amount of H2O2 2.5 mL, reaction time 1 h, reaction temperature 60 °C, the ratio of FCC gasoline and catalyst 40: 1 and pH 3.3. The olefin content of FCC gasoline dealt with this system was less than 35%, while the octane number of gasoline did not decrease, which has reached the national standard of clean FCC gasoline.
Yongqing H.,China University of Petroleum - East China |
Yongqing H.,China National Petroleum Corporation |
Yibin L.,China University of Petroleum - East China |
Sheng C.,Shtar Science and Technology Group |
Honghong S.,China University of Petroleum - East China
Petroleum Processing and Petrochemicals | Year: 2010
Study on the catalytic conversion of naphthenic acid over acidic catalyst was carried out on a micro-activity test unit. The effects of reaction temperature, catalyst loading amount and adding straight run diesel oil on the conversion and acid removal rate of naphthenic acid were investigated, and the results were compared with the thermal conversion. It was showed that naphthenic acid was easy to be converted over acidic catalyst. The influence of reaction temperature on the thermal deacidification was significant, but with much lesse influence on the catalytic deacidification, at 400 °C, the catalytic deacidification rate was almost 1000. Changes of reaction temperature and catalyst amount seemed have a little influence on the catalytic deacidification rate, but the conversion and product distributions were affected, which was similar to the conventional catalytic cracking. CO and CO2 were formed during the deacidification of naphthenic acid and mainly CO. Blending straight run diesel oil had little influence on the catalytic deacidification of naphthenic acid, which indicated that naphthenic acid in crude oil should be converted quite easily.
Long F.-L.,Sinopec |
Zhang Q.,Sinopec |
Yang X.-X.,China University of Petroleum - East China |
Feng H.-Q.,China University of Petroleum - East China |
Jia S.-L.,Shtar Science and Technology Group
Petrochemical Equipment | Year: 2011
Exergy analysis was used to evaluate the energy consumption for atmospheric and vacuum distillation unit in a refinery. The exergy analysis model was made for atmospheric and vacuum unit and its devices. The evaluation standards of exergy efficiency and exergy destruction rate were defined. The availability destruction of different devices for the unit and devices was calculated. The result shows that the exergy efficiency of atmospheric furnace and vacuum furnace is 41.5% and 44.1% respectively. The exergy destruction rates of atmospheric furnace, vacuum furnace, atmospheric column, vacuum column and heat exchangers are higher.
Hu Y.-Q.,China University of Petroleum - East China |
Hu Y.-Q.,China National Petroleum Corporation |
Liu Y.-B.,China University of Petroleum - East China |
Cai S.,Shtar Science and Technology Group |
And 5 more authors.
Xiandai Huagong/Modern Chemical Industry | Year: 2010
A study on two-stage riser catalytic cracking of Sudanese high TAN crude oil is carried out in the mini-riser experimental unit. LTB-2 and ZC-7300 are used as the catalysts. The experimental results show that Sudanese high TAN crude oil is very easy to crack over the catalysts. The conversion of Sudanese high TAN crude oil is very high over ZC-7300 catalyst, but the distribution of products is not very good, with the yield of diesel very low. However, the yields of diesel and light olefins are higher over LTB-2 catalyst though the conversion of Sudanese high TAN crude oil is lower than that over ZC-7300 catalyst. Petroleum acids in Sudanese high TAN crude oil can react completely over this catalyst. The yield of diesel is 21.63% and of propylene reaches up to 20.18%, with olefins content in gasoline being very low. Because of the high carbon residue of the feedstock, the yield of coke is very high. This will increase the charge of burning coke.