State Key Laboratory of Heavy Oil Processing

Qingdao, China

State Key Laboratory of Heavy Oil Processing

Qingdao, China

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Yang Y.,Tsinghua University | Zhang J.,Tsinghua University | Wang S.,Tsinghua University | Xu X.,Tsinghua University | And 4 more authors.
Nanoscale | Year: 2015

A simple strategy toward versatile encapsulations of inorganic nanocrystals, through a green hydrothermal treatment of commercial polyurethane sponge, was developed. This approach enables us to realize a general method to form a surface-adherent, N-doped coating with a controllable thickness for well-defined structures. These composites exhibit active properties in optical applications and energy storage. For example, N-doped carbon encapsulated Fe2O3 nanoboxes show a very high discharge capacity and outstanding cyclability, and the capacity still remained at 1086 mA h g-1 at a current density of 400 mA g-1 after 200 cycles. Our results described here provide a simple surface coating technique to design various functional nanostructures. © 2015 The Royal Society of Chemistry.


Li Y.,State Key Laboratory of Heavy Oil Processing | Li Y.,China National Petroleum Corporation | Liu D.,China National Petroleum Corporation | Liu C.,State Key Laboratory of Heavy Oil Processing | Liu C.,China National Petroleum Corporation
Energy and Fuels | Year: 2010

An ex situ presulfided MoNiP/γ-Al2O3 catalyst was prepared, and its hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) performances were evaluated with dibenzothiophene and quinoline as the model compound, respectively. Results indicated that the ex situ presulfided catalyst presented a similar sulfur removal rate as the in situ presulfided catalyst but its hydrogenation activity and HDN efficiency were relatively lower. However, its hydrogenation activity increased with longer time on stream (TOS). In a pilot test with fluidized catalytic cracking (FCC) diesel oil as feed, close HDS and HDN efficiencies were acquired for both presulfided catalysts. Furthermore, along with the running period, the ex situ presulfided catalyst exhibited incremental HDN efficiency as well as hydrogenation activity. An active-phase study was performed by means of Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscopy (XPS). Results showed that the ex situ presulfided catalyst presented relatively weaker MoS2 diffraction peaks and a lower stacking number and length of MoS2 slabs than those of the in situ presulfided catalyst with short TOS but those could be significantly enhanced with long TOS. XPS data also indicated that the ex situ presulfided catalyst only became partially sulfurized during the ex situ presulfiding process but could be further sulfided with long TOS. The conclusion was made that it was the distinction lying in the MoS2 active phase that caused the ex situ presulfided catalyst to have a lower hydrogenation activity with short TOS, and the distinction would be far more diminished with long TOS or in a real diesel oil system. Copyrigh © 2009 American Chemical Society.


Li X.,State Key Laboratory of Heavy Oil Processing | Li X.,China National Petroleum Corporation | Li X.,China University of Petroleum - Beijing | Shen B.,State Key Laboratory of Heavy Oil Processing | And 5 more authors.
Applied Catalysis A: General | Year: 2010

In order to increase the yield of ethylene and propylene in the catalytic pyrolysis of heavy oil, ZSM-5 zeolite was modified by Fe2O3 and TiO2 via pore volume impregnation. XRD, SEM, and TEM analysis indicated that the structure of the ZSM-5 remained intact after modification, and that the Ti and Fe partially entered the channels of the ZSM-5. Measurement of the number of Brønsted acid sites by n-propylamine temperature-programmed reaction and FTIR measurements showed that the Brønsted acid sites of Ti/ZSM-5 (TiO2 loaded ZSM-5) and Fe-Ti/ZSM-5 (Fe2O3 and TiO2 loaded ZSM-5) catalysts increased through the polarization function of Ti4+. DRS, XPS, and TPR results showed that the presence of Ti species improved the dispersion of Fe species on the surface of ZSM-5, whereas Fe2O3 promoted the reduction of TiO2. After modification by Fe2O3 and TiO2, the acidity and reduction properties of Fe-Ti/ZSM-5 improved; such improvement led to a decrease of the apparent activation energy of isopropyl benzene cracking over Fe-Ti/ZSM-5 by about 21 kJ/mol compared with that over ZSM-5. As a result, catalyst Fe-Ti/ZSM-5 showed a better catalytic cracking performance of n-decane and isopropyl benzene than catalysts Ti/ZSM-5, Fe/ZSM-5 (Fe2O3 loaded ZSM-5) or ZSM-5. © 2010 Elsevier B.V. All rights reserved.


Yang Z.,China University of Petroleum - Beijing | Li M.,China University of Petroleum - Beijing | Li M.,State Key Laboratory of Heavy Oil Processing | Peng B.,China University of Petroleum - Beijing | And 2 more authors.
Journal of Chemical and Engineering Data | Year: 2012

To investigate the effect of polarity of organic liquids and the dispersion state of CO 2 in organic liquids on the volume expansion of CO 2 + organic liquid systems, the solubility of CO 2 in methylbenzene and ethanol and the volume of CO 2 + methylbenzene and ethanol at different temperatures and pressures were measured with a PVT apparatus. The results imply that the microscopic dispersion state of CO 2 molecules in organic liquids under near-critical or supercritical conditions play a dominant role for increasing the volume of the CO 2 + organic liquid systems. The microscopic dispersion state and the solubility of CO 2 in the organic liquids and the volume expansion of the CO 2 + organic liquid systems are affected by the polarity and the structure of the organic liquid molecule obviously. When pressure and temperature are fixed, the intermolecular force between CO 2 molecule and the organic liquids and the intermolecular force operating within the organic liquids play a dominate role in the volume expansion of the CO 2 + organic liquid systems. © 2012 American Chemical Society.


Yang Z.,China University of Petroleum - Beijing | Li M.,China University of Petroleum - Beijing | Li M.,State Key Laboratory of Heavy Oil Processing | Peng B.,China University of Petroleum - Beijing | And 2 more authors.
Journal of Chemical and Engineering Data | Year: 2012

To investigate the effect of alkane molecular structure on the volume expansion of CO 2 + alkane systems, the solubility of CO 2 in hexane, octane, decane, and cyclohexane and the volume of CO 2 + alkanes at different temperature and pressure was measured with a PVT apparatus. The results imply that the dispersion state of CO 2 molecules in the alkane phase under near critical or supercritical condition of CO 2 plays a dominate role in increasing the volume of CO 2 + alkane systems. The solubility of CO 2 in the alkanes, the volume expansion of the CO 2 + alkane systems, and the London force operating within alkane molecules are strongly influenced by molecular structure of the alkanes and pressure. © 2012 American Chemical Society.


Wang L.,State Key Laboratory of Heavy Oil Processing | Shi G.,China National Petroleum Corporation | Xu J.,State Key Laboratory of Heavy Oil Processing | Fan Y.,State Key Laboratory of Heavy Oil Processing | Bao X.,China National Petroleum Corporation
Energy and Fuels | Year: 2014

In selective hydrodesulfurization processes for hydro-upgrading fluid catalytic cracking (FCC) naphtha with high olefin and sulfur contents, it is a common practice to split the feeding full-range FCC naphtha into a light fraction and a heavy fraction. This operation can effectively alleviate olefin saturation and thereby octane loss. Thus, the determination of a suitable cutting temperature plays a vital role in guaranteeing the success of the operation. Starting by fractionating two FCC naphthas into nine narrow cuts, this paper shows that, despite the great differences in the properties of the two FCC naphthas, both hydrocarbons and sulfides have almost the same distributions in the nine cuts. More importantly, it was observed that the distribution of sulfides in the narrow cuts is irrelevant to their true boiling points because of the formation of azeotropes between sulfides and hydrocarbons. On the basis of these findings, a simple model for estimating thiophene content in light FCC naphtha and, thereby, determining the cutting temperature was deduced and its applicability was verified using three other FCC naphthas sampled from different refineries. The salient feature of the model lies in that it only uses the total thiophene content of the feeding FCC naphtha to perform the estimation without the necessity to carry out time-consuming and cost-expensive pre-hydrogenation and fractionation tests. Thus, it can provide in-prior estimation for the design and operation optimization of FCC naphtha hydro-upgrading processes. © 2014 American Chemical Society.


Wang Z.,Wuhan Institute of Technology | Du Y.,Wuhan Institute of Technology | Xiang L.,State Key Laboratory of Heavy Oil Processing | Cheng J.,Wuhan Institute of Technology
Petroleum Processing and Petrochemicals | Year: 2010

Crumb rubber and SBS were used to modify asphalt(SK AH-70)by high shearing technology. In this paper), the effects of the mass ratio of base asphalt in pre-blending mixture, the amount of aromatics oil and stabilizing agent on the performance of modified asphalt were investigated through orthogonal experiment design to obtain the optimal preparation conditions. Under the optimal conditions of a mass ratio of asphalt in pre-blending mixture of 3, an aromatics oil added amount of 4% and a stabilizing agent added amount of 3%, the obtained modified asphalt having a softening point of 61.0 °C, a 5 °C ductility of 30.0 cm and an elastic recovery of 85%. Compared with SBS modified asphalt and crumb rubber modified asphalt, the performance of crumb rubber/SBS modified asphalt was better than the latter and a bit lower than the former, yet it could still meet the requirements of SBS modified asphalt, besides, it had the advantages of low cost and easy for construction, which indicated that it should have a promising future.


Wang Y.,State Key Laboratory of Heavy Oil Processing | Wang Y.,China National Petroleum Corporation | Wang Y.,China University of Petroleum - Beijing | Shen B.,State Key Laboratory of Heavy Oil Processing | And 14 more authors.
Fuel Processing Technology | Year: 2013

Phosphorus modified USY (P-USY) prepared by incipient wetness impregnation method, was used as the acidic component of the hydro-upgrading catalyst support. XRD, BET, NH3-TPD, 31P and 27Al MAS NMR, H2-TPR, XPS and HRTEM were used to characterize the samples. The acidity and active metal sites WS2 of the catalyst were particularly investigated. Phosphorus modification led to the decrease of acidity and increase of WS2 average stacking layers of NiW/P-USY + Al 2O3 catalysts compared with NiW/USY + Al2O 3. The increased ring opening products yields of NiW/P-USY + Al 2O3 catalysts can be achieved in the hydrogenation and ring opening of tetralin at 623 K. Especially, NiW/P-USY-2 + Al 2O3 catalyst exhibited highest ring opening products yield of 31.4 wt.%. This advantage of phosphorus modification is believed due to the synergetic role of WS2 and the acidity. © 2012 Elsevier B.V.


Zhao D.,China University of Petroleum - Beijing | Li M.,China University of Petroleum - Beijing | Li M.,State Key Laboratory of Heavy Oil Processing | Peng B.,China University of Petroleum - Beijing | And 2 more authors.
Journal of Dispersion Science and Technology | Year: 2013

To study the effect of Tween 60 on dispersion property of water-soluble phenol-formaldehyde resin (PFR), the size and zeta potential of PFR/Tween 60 molecule aggregates and the surface tension, turbidity and blocking property of PFR/Tween 60 dispersion were measured. The results of the study show that when Tween 60 concentration in the PFR/Tween 60 solutions is lower than CMC, the dispersion property of PFR solution is not affected by Tween 60 significantly. When Tween 60 concentration in the PFR/Tween 60 solutions is higher than CMC, the Tween 60 molecules, and PFR molecules form complex molecule aggregates in water which affected the dispersion property of PFR solution significantly. The interaction between Tween 60 molecule and PFR molecule in the complex molecule aggregates is stronger than the interaction between PFR molecules in the PFR molecule aggregates. © 2013 Copyright Taylor and Francis Group, LLC.


Zhang Y.,State Key Laboratory of Heavy Oil Processing | Zhang Y.,China University of Petroleum - Beijing | Zhang L.,State Key Laboratory of Heavy Oil Processing | Xu Z.,State Key Laboratory of Heavy Oil Processing | And 5 more authors.
Energy and Fuels | Year: 2014

Venezuela Orinoco extra-heavy-crude-oil-derived vacuum resid (VR) was subjected to supercritical fluid extraction and fractionation (SFEF) to prepare multiple narrow fractions. The SFEF fractions were analyzed by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) with various ionization techniques, including positive-ion electrospray ionization (ESI), negative-ion ESI, positive-ion atmospheric pressure photoionization (APPI), and sulfur methylation followed by positive-ion ESI. The results showed that the SFEF separates the VR species by their molecular weights and degrees of molecular condensation. The mass ranges of compounds determined by various ionization techniques were comparable. The FT-ICR MS data were in agreement with the elemental analysis and molecular weight determined by gel permeation chromatography (GPC) and vapor pressure osmometry (VPO) for the extractable fractions. The molecular compositions of SFEF fractions determined by FT-ICR MS provide important clues for the understanding of the molecular composition for the unextractable end-cut (asphaltenes). Each ionization technique favors identification of certain compounds in heavy petroleum fractions and discriminates against others. APPI allows for a general overview of species present in heavy petroleum fractions, because of its ability to ionize a wide range of species. ESI is more selective toward polar species. A thorough characterization of species in heavy petroleum fractions cannot be achieved by using an ionization technique; however, it can be performed by combining various ionization techniques. © 2014 American Chemical Society.

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