Lanzhou Petrochemical Company

Lanzhou, China

Lanzhou Petrochemical Company

Lanzhou, China
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Bu X.-G.,Lanzhou Petrochemical Company | Wu K.-T.,Lanzhou Petrochemical Company
Huaxue Gongcheng/Chemical Engineering (China) | Year: 2017

In order to realize the qualitative and quantitative analysis of sulfide hydrocarbon components in the refineries, gas phase chromatography sulfur chemistry luminescence detector (GC-SCD) combination analysis method was adopted to study liquid hydrocarbon sulfide components analysis method of gas refining device of catalytic cracking plant in a domestic refinery. Through the optimization of the chromatographic conditions, the effect of chromatographic conditions on the separation of sulfide in liquid hydrocarbons was investigated. The qualitative analysis was made to the common 41 sulfides by the retention time of the standard substance, the relative ASTM standard and the related literature. An analytical method for the distribution of various types of sulfide in the liquid hydrocarbon of the catalytic cracking unit in refinery was established. The method was simple and rapid, and it had a linear response to the sulfur compound, and the detection sensitivity was high. It was successfully used in the analysis of sulfide component of gas refining device of liquid hydrocarbons in the catalytic cracking plant of a domestic refinery, which provided technical support for optimization of refinery desulfurization device production process and improves the desulfurization technology. © 2017, Editorial Office of "CHEMICAL ENGINEERING"(CHINA). All right reserved.

Wang K.,South Dakota State University | Xu M.,Lanzhou Petrochemical Company | Shrestha M.,Michigan State University | Gu Z.,South Dakota State University | Fan Q.H.,Michigan State University
Materials Today Energy | Year: 2017

This work demonstrated an efficient plasma exfoliation of graphite oxides to fabricate graphene at ambient temperature. The microstructure, morphology and composition of the prepared graphene were confirmed by X-ray diffraction, transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. The plasma exfoliation mechanism was revealed based on the plasma emission spectra. The electrochemical performance of symmetrical electrode supercapacitors made of the plasma exfoliated graphene was tested by cyclic voltammetry, electrochemical impedance spectroscopy, and cycle-life measurement. It was showed that graphite oxide exfoliated by CH4 plasma led to better specific capacitance and stability than that exfoliated by O2 and N2 plasmas. This study provided a new perspective and potentially efficient way to upscaling graphene manufacturing. © 2017 Elsevier Ltd

Li L.,Lanzhou Petrochemical Company | Liu B.,Lanzhou Petrochemical Company | Sun L.,Lanzhou Petrochemical Company
Petroleum Processing and Petrochemicals | Year: 2017

This paper analyzed the operation problems of 1. 2 Mt/a delayed coking unit in PetroChina Lanzhou Petrochemical Company and introduced the results after technical transformation. The problems in existing unit included: (i)high content of oil, COD and suspended matter in coke quench sewage, which was unable to reuse as a cold coke cutting water; (ii)coke fines in the sour water from fractionator overhead, and in coking gasoline and diesel, which influence long period operation of the downstream unit; (iii)design defects in process interlock of heating furnace, leading to an invalid use. To solve these problems, a cold coke sewage treatment system and a coke powder removing system were added. Then the treated cold coke sewage can be reused and the influence of coke fines on the operation for downstream unit is reduced; the interlocking mode of heater furnace was changed from "one-out-of-one" to "two-out-of-three", and is successfully applied after transformation.

Zheng Z.-W.,Xiamen University | Shi D.-P.,Xiamen University | Su P.-L.,Xiamen University | Luo Z.-H.,Xiamen University | Li X.-J.,Lanzhou Petrochemical Company
Industrial and Engineering Chemistry Research | Year: 2011

In this work, we developed the steady-state and dynamic models for the commercial polypropylene process of Basell Spheripol technology, involving fundamental chemical engineering principles and advanced software tools, i.e., Polymers Plus and Aspen Dynamics. The models considered the important issues of physical property and thermodynamic model selection, catalyst characterization, and reactor model. Besides, a multisite catalyst with traditional Ziegler-Natta polymerization kinetics was introduced to describe the broad molecular weight distribution of the polymers produced in this polypropylene technology. Both the continuous stirred tank reactor model and the combined plug flow reactors model were proposed to simulate the reactors. Furthermore, we validated the models using industrial data and demonstrated application of the dynamic model to grade change, start up, and shut down at a certain emergent accident. © 2010 American Chemical Society.

Wang H.-B.,Lanzhou University | Zhang Y.-H.,Lanzhou Petrochemical Company | Yang H.-L.,Lanzhou University | Ma Z.-Y.,Lanzhou University | And 3 more authors.
Microporous and Mesoporous Materials | Year: 2013

A novel solid catalyst for coupling reaction has been successfully prepared by immobilizing palladium in the nanocages of the ethylenediamine- functionalized mesoporous material SBA-16. The structure and composition of the solid catalyst were characterized by N2 adsorption-desorption, XRD, TEM, FT-IR and TGA. These results revealed that Pd(II) was successfully embedded inside the nanocages of SBA-16. This catalyst afforded high activity (over 91% conversion) for the Suzuki coupling of various aryl bromides and phenyiboronic acids in ethanol solvent at 60°C even at the loading of 0.5 mol% Pd. Moreover, the SBA-16-2 N-Pd(II) catalyst could be separated easily from reaction mixture and reused for ten times without obvious loss of catalytic activity, showing the superiority over the homogeneous catalysts in industrial applications. © 2012 Elsevier Inc. All rights reserved.

Yang W.,Lanzhou Petrochemical Company
Petroleum Refinery Engineering | Year: 2012

The impacts of blending FCC slurry into the feed of delayed coking unit on unit operating conditions, coker product distribution and product quality as well as problems arising from FCC slurry blending are analyzed. The results ts show that, after FCC slurry blending, the liquid product yield is lowered by 1.8%, the coke yield is increased by 2. 0%, the product quality becomes poorer, the coking trend of furnace tubes is increased, the coke powder deposition in the fractionator bottom filter is serious, and energy consumption of the unit is raised. To minimize these impacts, the following measures shall be taken, such as filtration and sufficient settlement of FCC slurry to minimize the catalyst particles in the slurry before blending into the feed of delayed coking unit, possibly reducing the percentage of FCC slurry in delayed coker feed to ensure the long-term operation of the unit and strengthening the monitoring and scheduled inspection and cleaning delayed coker equipment.

Han Y.,CAS Lanzhou Institute of Chemical Physics | Han Y.,University of Chinese Academy of Sciences | Qiao D.,CAS Lanzhou Institute of Chemical Physics | Zhang L.,Lanzhou Petrochemical Company | Feng D.,CAS Lanzhou Institute of Chemical Physics
Tribology International | Year: 2015

Three kinds of phosphonate ionic liquids (PILs), 1-butyl-3-methylimidazolium O-butyl phosphonate (BMIM-BP), 1-butylpyridinium O-butyl phosphonate (BPy-BP) and N, N-dibutylammonium O-butyl phosphonate (TBA-BP) were synthesized and evaluated as lubricants for steel/aluminum contact. Results show PILs perform much better lubricating properties than conventional ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate and liquid paraffin, although the wear volume of BMIM-BP is larger than that of liquid paraffin. The results of corrosion tests of the PILs demonstrate that the lubricating properties of PILs are relevant with their electrochemical properties. Moreover, the tribological mechanism was discussed by surface characterizations and contrastive experiment. It is concluded that the tribological performances of the PILs are related to the formation of the ordered adsorption films, tribochemical reactions and their corrosion properties. © 2014 Elsevier Ltd. All rights reserved.

Li Y.,CAS Lanzhou Institute of Chemical Physics | Li Y.,University of Chinese Academy of Sciences | Wang Q.,CAS Lanzhou Institute of Chemical Physics | Wang T.,CAS Lanzhou Institute of Chemical Physics | Pan G.,Lanzhou Petrochemical Company
Journal of Materials Science | Year: 2012

Graphene oxide (GO)/nitrile rubber (NBR) nanocomposites with various contents of GO were prepared by a solution-mixing method,in this study. The GO sheets were exfoliated from natural fake graphite by an improved Hummers method and could be further dispersed homogeneously in NBR matrix. The thickness and size of the GO sheets were observed by atomic force microscopy and transmission electron microscopy. The tribological properties of the GO/NBR nanocomposites were evaluated on a ring-block MRH-3 wear tester under dry sliding and water-lubricated conditions. The worn surface morphologies of the GO/NBR nanocomposites were observed by a scanning electron microscopy. It was found that under dry sliding, both the friction coefficient (COF) and specific wear rate of the nanocomposites decreased dramatically at first, then increased with increasing GO contents, while under water-lubricated condition, both the COF and specific wear rate of the nanocomposites decreased with increasing GO contents. Finally, the friction and wear mechanisms of the GO/NBR nanocomposites were tentatively proposed. © 2011 Springer Science+Business Media, LLC.

Zhao Z.,Lanzhou Petrochemical Company
Hecheng Shuzhi Ji Suliao/China Synthetic Resin and Plastics | Year: 2015

Isotactic polypropylene (iPP) produced with an industrial heterogeneous Ziegler-Natta catalyst in lab and on industrial scale was characterized by high temperature gel permeation chromatography (GPC), differential scanning calorimetry (DSC), etc. The effects of hydrogen and external electron donor cyclohexyl methyl dimethoxy silane (CHMMS) on the relative molecular mass and its distribution, stereoregularity and crystallization property of iPP were investigated at the polymerization temperature of 60, 70℃. The results show that the influences of hydrogen and CHMMS on the microstructure of iPP depend on the polymerization temperature greatly. The content of stereoregularity pentad sequence structure is increased from 60.16% to 77.45% by adding hydrogen without CHMMS at 60℃. Hydrogen and CHMMS regulate the three-dimensional micro-defect distribution of iPP by influencing head-head or head-tail combination way of propylene molecules. ©, 2014, Hecheng Shuzhi Ji Suliao/China Synthetic Resin and Plastics. All right reserved.

Li Y.,CAS Lanzhou Institute of Chemical Physics | Li Y.,University of Chinese Academy of Sciences | Pan D.,Beijing University of Chemical Technology | Chen S.,CAS Lanzhou Institute of Chemical Physics | And 3 more authors.
Materials and Design | Year: 2013

Significant reinforcement of polyurethane/epoxy (PU/EP) composites in situ synthesized on the graphene oxide nanosheets (GONS) is reported for the first time. Firstly, the PU prepolymer was in situ synthesized on the GONS. Then, the EP and a curing agent were added to prepare the PU/graphene oxide/EP (PU/GO/EP) nanocomposites. Morphologic study shows that, due to the formation of chemical bonding, the GONS was dispersed well in the PU/EP matrix and formed a strong interfacial interaction between the GONS and the matrix. With the incorporation of 0.066. wt% of GONS, the tensile modulus of PU/GO/EP nanocomposites increased from 218. MPa to 257. MPa, the tensile strength and elongation at the break of the PU/GO/EP nanocomposites increased by more than 52% and 103%, respectively. Additionally, the enhancing mechanism was tentatively proposed. The thermogravimetric analysis tests show that graphene oxide slightly changed the thermal stability of PU/GO/EP nanocomposites. It is hoped that our current work could provide an effective and promising method for preparing graphene-based polymer composites. © 2013 Elsevier Ltd.

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