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Zhang T.,SINOPECResearch Institute of Petroleum Processing | Zhang T.,Sinopec | Zhou L.,SINOPECResearch Institute of Petroleum Processing | Zhou L.,Sinopec | And 2 more authors.
Petroleum Processing and Petrochemicals | Year: 2011

The crystallinity of rare earth (RE) exchanged zeolite Y is determined by XRD method. Results show that with the increase of RE contents in zeolite,the zeolite crystallinities decrease significantly, and the changes of crystallinity are not reflecting vary from zeolite crystal structure, just because the determination of zeolite crystallinity by XRD is disturbed by the existence of rare earth cations. The distribution of RE in zeolite trends to be even during calcination, thus the effect of RE cations on the determination of crystallinity is less for calcined RE-exchanged zeolite Y. By mathematical fitting, a formula is established between the changes of zeolite crystallinity and the contents of rare earth oxide in zeolite. Source


Wang Q.,SINOPECResearch Institute of Petroleum Processing | Long X.,SINOPECResearch Institute of Petroleum Processing | Nie H.,SINOPECResearch Institute of Petroleum Processing
Petroleum Processing and Petrochemicals | Year: 2011

Effect of basic nitrogen compound (quinoline) and non-basic nitrogen compound (indole) on the catalytic activity and product selectivity of the hydrodesulfurization (HDS) reactions of dibenzothiophene (DBT) and 4, 6-dimethyldibenzothiophene (4, 6-DMDBT) were investigated over sulfided NiW/Al2O3 catalyst. The results for DBT and 4, 6-DMDBT were varied. With the existence of nitrogen compounds, the HDS reactions of DBT enhanced due to the improved DDS reaction activity, yet for 4, 6-DMDBT, its HDS reaction activity decreased significantly. The adsorption of nitrogen compounds on the hydrogenation active sites of catalyst could inhibit the adsorption of sulfur compounds, resulting in the suppression of HYD reactions, and simultaneously, the accessible active sites on the catalyst surface seemed to be redistributed. In this case, the molecule size and stereo structure of the sulfur compounds become essential. Smaller size DBT molecules could access hydrogenolysis active sites via sulfur atom easily and its hydrogenolysis activity improved; large 4, 6-DMDBT molecules were suffocated by overcrowding nitrogen compounds to access active sites, thus the hydrogenolysis activity of 4, 6-DMDBT decreased with the increase of nitrogen content. Source


Zhao J.,SINOPECResearch Institute of Petroleum Processing | Shi S.,SINOPECResearch Institute of Petroleum Processing | Cheng S.,SINOPECResearch Institute of Petroleum Processing
Petroleum Processing and Petrochemicals | Year: 2015

CeAPO-5 molecular sieves were synthesized in the absent of HF using hydrothermal method. The effect of synthesis conditions including gel process, the kinds of Al resource and template, and the adding amounts of template, CeO2, and H2O on the structure of CeAPO-5 molecular sieves was investigated by X-ray fluorescence spectrometry, N2 adsorption-desorption, XRD, and 27Al NMR. When the Al resource is added into phosphoric acid aqueous solution under the synthesis conditions of V250 powder as an Al resource, triethylamine (Et3N) as a template, and n ( A1203 )jn ( P205 ) = 0.98, n(Et3N)/n(P2O5)=2.0, n(CeO2)/n(P2O5)=0. 06, n(H20)/n(P205 ) = 50, the relative crystallinity of CeAPO-5 molecular sieve reaches 99. 4%. Source


Shen M.,SINOPECResearch Institute of Petroleum Processing | Wang Z.,SINOPECResearch Institute of Petroleum Processing | Li Y.,SINOPECResearch Institute of Petroleum Processing | Li B.,SINOPECResearch Institute of Petroleum Processing
Petroleum Processing and Petrochemicals | Year: 2015

Studies indicated that the reason for demulsion difficulty of Tahe emulsified crude oil was closely related to residual chemicals, solid particles, resins and asphaltenes in the crude oil. Therefore, a demulsifying technology were developed for the crude, including excellent performance chemicals, such as demulsifiers, wetting agents, and neutralizer as well as the supporting treatment technologies of washing and electrostatic field. The results show that the washing pretreatment of oil could reduce the dosing of chemicals and provide a lower load for the subsequent process, and benefits for the smoothly running of electric dehydrator. After washing, the subsequent chemical demulsification and electrostatic dehydration technologies can reduce the water content to less than 1%, satisfied with the requirement of Tahe oilfield. Source


Xu Y.,SINOPECResearch Institute of Petroleum Processing | Zhang J.,SINOPECResearch Institute of Petroleum Processing | Long J.,SINOPECResearch Institute of Petroleum Processing | Chang X.,SINOPECResearch Institute of Petroleum Processing
Petroleum Processing and Petrochemicals | Year: 2011

Data related with energy consumption, gasoline quality and product distributions of 35 MIP units were collected and analyzed in this paper. Compared with FCC units,the energy consumption of MIP units decreased by 330— 425 MJ/t, in which 215. 47— 336. 14 MJ/t was directly attributed to the heat reductions of feed heating and reaction heat. The contents of olefin, sulfur and benzene in MIP gasoline were decreased significantly, thus pollutants emission was reduced. Up to now, the total processing capacity of MIP series units reached more than 70. 00 Mt/a, an increment of 1. 092 Mt/a liquid products and a diminution of 0. 354 8 Mt/a coke are obtained as compared with FCC process,just as reducing 1. 30 Mt CO 2 emission annually. Source

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