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Boosting methylcyclohexane dehydrogenation over Pt-based structured catalysts by internal electric heating

Nano Research 2023年第10期16卷 12215-12222页

作者： Wenhan Wang Guoqing Cui Cunji Yan xuejie Wang Yang Yang chunming xu Guiyuan Jiang State Key Laboratory of Heavy Oil Processing China University of Petroleum(Beijing)Beijing 102249China Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Methylcyclohexane(MCH)serves as an ideal hydrogen carrier in hydrogen storage and transportation *** the continuous production of hydrogen from MCH dehydrogenation,the rational design of energy-efficient catalytic way with good performance remains an enormous ***,an internal electric heating(IEH)assisted mode was designed and proposed by the directly electrical-driven catalyst using the resistive heating *** Pt/Al2O_(3)on Fe foam(Pt/Al2O_(3)/FF)with unique threedimensional network structure was *** catalysts were studied in a comprehensive way including X-ray diffraction(XRD),scanning electron microscopy(SEM)-mapping,in situ extended X-ray absorption fine structure(EXAFS),and in situ COFourier transform infrared(FTIR)*** was found that the hydrogen evolution rate in IEH mode can reach up to above 2060 mmol·gPt^(−1)·min^(−1),which is 2–5 times higher than that of reported Pt based catalysts under similar reaction conditions in conventional heating(CH)*** combination with measurements from high-resolution infrared thermometer,the equations of heat transfer rate,and reaction heat analysis results,the Pt/Al2O_(3)/FF not only has high mass and heat transfer ability to promote catalytic performance,but also behaves as the heating component with a low thermal resistance and heat capacity offering a fast temperature response in IEH *** addition,the chemical adsorption and activation of MCH molecules can be efficiently facilitated by IEH mode,proved by the operando MCH-FTIR ***,the as-developed IEH mode can efficiently reduce the heat and mass transfer limitations and prominently boost the dehydrogenation performance,which has a broad application potential in hydrogen storage and other catalytic reaction processes.

关键词： Pt/Al2O_(3)/Fe foam(FF)structured catalyst internal electrical heating hydrogen methylcyclohexane dehydrogenation heat transfer

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Selection of Sinopec Lubricating Oil Producing Bases by Using the AHP Model

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Petroleum Science 2007年第1期4卷 90-96页

作者： Song Yunchang Song Zhaozheng Zheng Chengguo Jiang Qingzhe xu chunming State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China Crude Stabilization Plant Tuha Oilfield Company PetroChina Shanshan Xinjiang 838202 China

The factors affecting the developmcnt of Sinopec lubricating oil were analyzed in this paper, and an analytic hierarchy process （AHP） model for selecting lubricating-oil producing bases was developed. By using this model, nine lubricating oil producing companies under Sinopec were comprehensively evaluated. The evaluation result showed that the Maoming Lubricating Oil Company （Guangdong province）, Jingmen Lubricating Oil Company （Hubei province） and Changcheng Lube Oil Company （Beijing） are top three choices, and should be developed preferentially for the development of Sinopec producing bases of lubricating oil in the future. The conclusions provide the theoretical basis for selecting lubricating oil producing bases for decision makers.

关键词： Lubricating oil analytic hierarchy process comprehensive evaluation selection of producing bases

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Properties Correlations and Characterization of Athabasca Oil Sands-derived Synthetic Crude Oil

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Petroleum Science 2007年第3期4卷 84-90页

作者： Wang Jun Zhao Suoqi xu chunming Chung Keng H. State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China Petrochemical Institute of PetroChina Beijing 10083 China EnergyINet Calgary Alberta Canada

Narrow fractions of Athabasca oil sands-derived synthetic crude oil （SCO） from Canada were obtained by distillation at 20 ℃ to 500 ℃ and characterized. The yield and properties, such as density, refractive index, viscosity, freezing point, sulfur and nitrogen content and UOP K-index, were correlated as a function of boiling temperature （Tb）. The properties of naphtha fractions, jet fuel and diesel fractions could be predicted accurately with the correlations, which are useful for process design considerations, such as optimizing operating conditions of refinery processing units. The other key properties and characteristics of naphtha fractions, jet fuel, diesel and vacuum gas oil were also determined.

关键词： SCO properties correlation characterization

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The catalytic behavior of La-Mn-O nanoparticle perovskite-type oxide catalysts for the combustion of the soot particle from the diesel engine

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Chinese Science Bulletin 2005年第14期50卷 1440-1444页

作者： WANG Hong ZHAO Zhen xu chunming LIU Jian LU Zhixiao State Key Laboratory of Heavy Oil Processing University of Petroleum Beijing 102249 China Beijing Institute of Petrochemical Technology Beijing 102617 China

The La1?xMx MnO3(M=Li, Na, K, Rb, x=0, 0.10, 0.25) perovskite-type oxides whose sizes are nanoparticle have been prepared by the citric acid-ligated method. The characters of the catalysts were characterized by means of XRD, IR, SEM and BET surface area measurement. The catalytic activity for the combustion of soot particulate was evaluated by a technique of the temperature-programmed reaction. In the LaMnO3 catalyst, the partial substitution of alkali metal (Li, Na, K, Rb) into A-site enhanced the catalytic activity for the combustion of soot particle. The La0.75K0.25MnO3 oxides are good candidate catalysts for the soot particle removal reaction, and the combustion tem- peratures of soot particle are between 285℃ and 430℃ when the contact of catalysts and soot is loose, and their catalytic activities for the combustion of soot particle are as good as supported Pt catalysts, which is the best catalyst system so far reported for soot combustion under loose con- tact conditions.

关键词：柴油机燃烧室煤烟离子氧催化剂接触反应

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Mass production of highly fluorescent full color carbon dots from the petroleum coke

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Chinese Chemical Letters 2021年第4期32卷 1532-1536页

作者： Junfei Ma Linzhou Zhang Xiu Chen Rigu Su Quan Shi Suoqi Zhao Quan xu chunming xu State Key Laboratory of Heavy Oil Processing China University of Petroleum-BeijingBeijing 102249China Engineering Technology Research Institute o/PetroChina Xinjiang Oilfield Company Karamay 834000China

Heavy oil is treated as an undesirable raw material in traditional refining markets because of its low ***,its rich natural aromatic structure and heteroatomic compounds make it possible to be a precursor to large-scale production of carbon *** heavy oil and three SDA products as precursors,we synthesized highly fluorescent multi-color carbon dots(CDs)by hydrothermal method,which can precisely control the photoluminescence wavelength in the range of 350-650 *** synthesized carbon dots have the advantages of good long-term stability and stability under extreme pH conditions and low ***,the carbon dots synthesized with asphalt as the precursor have the highest fluorescence quantum yield.X-ray photoelectron spectroscopy(XPS)is used to elucidate the effects of different precursor on emission color change and photoluminescence quantum yield(PLQY),thus providing a controlled tuning of the system for the functionalization of *** we further used the CDs in macrophage *** pathway gives a reliable and repeatable industry possibility and may boost the applications of CDs into reality.

关键词： Full color Carbon dots Petroleum coke Macrophage labeling SDA

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Synergistic effect of electrode defect regulation and Bi catalyst deposition on the performance of iron–chromium redox flow battery

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Chinese Chemical Letters 2023年第10期34卷 281-286页

作者： Quan xu Siyang Wang chunming xu Xinyi Chen Senwei Zeng Chuanyuan Li Yang Zhou Tianhang Zhou Yingchun Niu State Key Laboratory of Heavy Oil Processing China University of Petroleum-BeijingBeijing 102249China

Iron-chromium redox flow batteries (ICRFBs) possess advantages of high safety,long cycle time,and *** Cr^(3+)/Cr^(2+)reaction activity is suggested as one of the most promising strategies to improve the performance and prolong the lifetime of *** improve the slow reaction kinetics of the negative electrode,a type of defected carbon cloth with Bismuth (Bi) catalyst introduction is prepared by defect engineering method and electrochemical deposition,which provided defect sites and active sites to catalyze the redox couple’s reaction of ***,this modified carbon cloth adsorbs Cr(Ⅲ)hydrate more easily,which has a more stable structure and can significantly improve the performance of *** experimental analysis and theoretical calculation indicated that the modified electrode has excellent electrocatalytic ability,which can enhance the reaction rate of Cr^(3+)/Cr^(2+),improve capacity retention and stabilize cycling *** capacity degradation rate of an ICRFB single cell with the modified electrodes is just 0.23%per cycle at a current density of 140 m A/cm^(2).Additionally,the energy efficiency (EE) remains around 83%,which is 8.45%higher than that of the pristine electrode assembled battery under 60 *** work supplies a simple method to obtain a high-performance electrode material for ICRFBs and makes it a practical solution to promote ICFRBs large-scale commercialization process.

关键词： Bismuth Iron-chromium redox flow batteries (ICRFBs) Carbon cloth Electrode catalyst Defect engineering

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Influence of zinc state on the catalyst properties of Zn/HZSM-5 zeolite in 1-hexene aromatization and cyclohexane dehydrogenation

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Chinese Journal of Chemical Engineering 2022年第3期35卷 124-134页

作者： Di Gao Yibo Zhi Liyuan Cao Liang Zhao Jinsen Gao chunming xu Mingzhi Ma Pengfei Hao State Key Laboratory of Heavy Oil Processing China University of Petroleum(Beijing)Beijing 102249China Hebei Jingzhi Technology Company Limited Cangzhou 061000China

Rational design of Zn-containing HZSM-5 zeolite(Zn/HZSM-5)with high reactivity and excellent aromatization performance for olefin aromatization is crucially *** develop a new and uncomplicated method to synthesize Zn/HZSM-5(IMX/Z5)with superior aromatization performance in the *** to incipient wetness impregnation(IMP/Z5)and mechanical mixing(MIX/Z5),the asprepared IMX/Z5 presents a higher amount of surface ZnOH^(+)species(2.87%)while keeping identical bulk zinc *** a result,more surface ZnOH^(+)favor both the aromatization of 1-hexene and cyclohexane *** the two olefin aromatization pathways(hydrogen transfer and dehydrogenation),it is the first time found both the hydrogen transfer ability and the dehydrogenation ability increase linearly with the amount of surface ZnOH^(+)species while keeping identical bulk zinc *** believe that the linear relationships are essential to design next generation olefin aromatization catalysts.

关键词： Zinc state Catalyst Catalysis Hydrogen transfer Dehydrogenation Moleclar sieves

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Fabrication of highly effective electrodes for iron chromium redox flow battery

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Nano Research 2024年第5期17卷 3988-3996页

作者： Yingchun Niu Chao Guo Yinping Liu Guangfu Wu Tianhang Zhou Fangang Qu Ziji Yang Ali Heydari chunming xu Quan xu State Key Laboratory of Heavy Oil Processing China University of Petroleum(Beijing)Beijing 102249China

Iron-chromium redox flow batteries(ICRFBs)have emerged as promising energy storage devices due to their safety,environmental protection,and reliable *** carbon cloth(CC),often used in ICRFBs as the electrode,provides a suitable platform for electrochemical processes owing to its high surface area and interconnected porous ***,the CC electrodes have issues,such as,insufficient electron transfer performance,which limits their industrial ***,we employed silicic acid etching to carve dense nano-porous structures on the surface of CC electrodes based on the favorable design of ICRFBs and the fundamental principles of electrode polarization *** a result,we developed a multifunctional carbon cloth electrode with abundant vacancies,notably enhancing the performance of the *** fabricated electrode showcased a wealth of defect sites and superior electronic transport properties,offering an extensive and effective reaction area for rapidly flowing *** an electrode compression ratio of 40%and the highest current density in ICRFBs so far(140 mA·cm^(-2)),the battery achieved the average energy efficiency of 81.3%,11.24%enhancement over the previously published ***,throughout 100 charge-discharge cycles,the average energy efficiency degradation was negligible(~0.04%),which has the potential to become the most promising candidate for large-scale and long-term electrochemical energy storage applications.

关键词： iron chromium redox flow battery electron carbon cloth defect site density functional theory(DFT)calculation

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Petroleum heteroatom compounds in various commercial delayed coking liquids： characterized by FT-ICR MS and GC techniques

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Science China Chemistry 2017年第2期60卷 284-292页

作者： Miao Hu Chuang Guo Linzhou Zhang Suoqi Zhao Keng H. Chung chunming xu Quan Shi State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China Daqing Oilfield Limited Corporation Daqing 163159 China North Huajin Chemical Industries Group Corporation Panjin 124000 China

Delayed coking is an important petroleum resid conversion *** processability of coking liquids is known to be dependent on the heteroatom compounds present in the coking *** commercial delayed coking liquids were characterized by electrospray ionization(ESI)Fourier transform ion cyclotron resonance mass spectrometry(ESI FT-ICR MS)and gas chromatographic *** relatively abundant heteroatom compounds in the coking liquids were 1-4 aromatic-ring pyridinic nitrogen compounds,carbazoles,benzocarbazoles,phenols,mercaptans,benzothiophenes,dibenzothiophenes,and *** liquids derived from various feeds had similar compound class types,molecular weight distribution ranges,and double bond equivalents(DBE).However,the concentration of individual compounds and the distribution of DBE versus carbon number of heteroatom compounds varied.A comparison of heteroatom compounds in coker feeds and products revealed the various reaction mechanism of heteroatom compounds occurred during the coking *** results suggested that molecular-level process models can be developed for optimization of unit operation to obtain desirable products that meet the environmental specifications and quality requirements.

关键词： FT-ICR MS molecular composition heteroatom compounds petroleum delayed coking

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Study on reformulation of fluid catalytic cracking gasoline and increasing production of light olefins

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Frontiers of Chemical Science and Engineering 2008年第1期2卷 74-79页

作者： Pingxiang YAN Xianghai MENG Jinsen GAO chunming xu Zhiyu SUI State Key Laboratory of Heavyoil Processing China University of PetroleumBeijing 102249China

The effects of reaction temperature,mass ratio of catalystto oil,space velocity,andmass ratio of water to oil on the product distribution,the yields of light olefins(light olefins including ethylene,propylene and butylene)and the composition of the fluid catalytic cracking(FCC)gasoline upgraded over the self-made catalyst GL in a confined fluidized bed reactor were *** experimental results showed that FCC gasoline was obviously reformulated under appropriate reaction *** olefins(olefins with C atom number above 4)content of FCC gasoline was markedly reduced,and the aromaticscontent andoctanenumber were *** upgraded gasoline met the new standard of gasoline,and meanwhile,higher yields of light olefins were ***,higher reaction temperature,higher mass ratio of catalyst to oil,higher mass ratio of water to oil,and lower space velocity were found to be beneficial to FCC gasoline reformulation and light olefins production.

关键词： fluid catalytic cracking gasoline catalytic reformulation light olefins

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