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Optimization of Product Distribution for MIP Units Using Data Mining

China Petroleum Processing & petrochemical Technology 2024年第2期26卷 146-157页

作者： Wang Qing Zhang Xiaoguo Mei Junwei Gao Zhibo Yang Kuizhi Yang Dawei Ouyang Fusheng International Joint Research Center of Green Energy Chemical Engineering East China University of Science and TechnologyShanghai 200237China SINOPEC changling petrochemical co. LtdYueyang 414012China

Based on data from a petrochemical company’s MIP unit over the past three years,19 input variables and 2 output variables were selected for modeling using the maximum information coefficient and Pearson correlation coefficient among 155 variables,which included properties of feedstock oil and spent catalyst,operational variables,and material flows.The distillation range variables were reduced using factor analysis,and the feedstock oils were clustered into three types using the K-means++algorithm.Each feedstock oil type was then used as an input variable for modeling.An XGBoost model and a back propagation(BP)neural network model with a structure of 20-15-15-2 were developed to predict the combined yield of gasoline and propylene,as well as the coke yield.In the test set,the BP neural network model demonstrated better fitting and generalization abilities with a mean absolute percentage error and determination coefficient of 1.48%and 0.738,respectively,compared to the XGBoost model.It was therefore chosen for further optimization work.The genetic algorithm was utilized to optimize operational variables in order to increase the combined yield of gasoline and propylene while controlling the growth of coke yield.Seven commercial test results in the MIP unit showed an average increase of 1.39 percentage points for the combined yield of gasoline and propylene and an average decrease of 0.11 percentage points for coke yield.These results indicate that the model effectively improves the combined yield of gasoline and propylene while controlling the increase in coke yield.

关键词： MIP process K-Means++ BP neural network model XGBoost algorithm genetic algorithm

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computational Fluid Dynamics Simulation of Liquid-Phase FCC Diesel Hydrotreating in Tubular Reactor

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China Petroleum Processing & petrochemical Technology 2015年第4期17卷 102-110页

作者： Li Hua Liu Ningqiang Zeng Zhiyu Zou Ying Wang Jiming Research Institute of Petroleum Processing East China University of Science and Technology SINOPEC changling company Hunan changling petrochemical S&T Developing co. Ltd. China petrochemical corporation

The computational fluid dynamics(CFD) code, FLUENT, was used to simulate the liquid-phase FCC diesel hydrotreating tubular reactor with a ceramic membrane tube dispenser. The chemical reaction and reaction heat were added to the model by user-defined function(UDF), showing the distribution of temperature and content of sulfides, nitrides, bicyclic aromatics and monocyclic aromatics in different parts of the reaction bed. When the pressure was 6.5 MPa, the amount of mixing hydrogen was 0.84%(m), the space velocity was 2 h-1 and the inlet temperature was 633 K, the temperature reached a maximum at a height of 0.15 m, and the range of radial temperature reached its maximum(2.5 K) at a height of 0.15 m. It indicated that the proper ratio of height to diameter of catalyst bed in the tubular reactor was 5-6. The increase of inlet temperature, the mixing hydrogen and the decrease of space velocity led to the decrease in the content of bicyclic aromatics, sulfides and nitrides, and the increase in monocyclic aromatics content, while the high temperature increased. The results were in good agreement with experimental data, indicating to the high accuracy of the model.

关键词：计算流体动力学模拟柴油加氢反应器催化裂化液相用户自定义函数 FLUENT 单环芳烃入口温度

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Catalytic performance of iron carbide for carbon monoxide hydrogenation

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Journal of Natural Gas Chemistry 2010年第5期19卷 468-470页

作者： Minglin Xian Juan Zou Qinghua Li Xichun She Hunan changling petrochemical S＆T Developing co. ltd. Yueyang 414012 Hunan China

Novel iron carbide and potassium-promoted iron carbide catalysts were prepared and investigated for co hydrogenation. The iron carbide showed high activity for co hydrogenation under high pressures; with the addition of potassium, activity and selectivity to C5＋ hydrocarbons were greatly enhanced, and the selectivity to methane was suppressed under high pressure.

关键词： iron carbide potassium carbon monoxide hydrogenaion

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多级孔道β分子筛上苯与多仲丁基苯烷基转移反应(英文)

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Chinese Journal of Chemical Engineering 2014年第8期22卷 898-902页

作者：李英霞罗灿王煊黄崇品陈标华 State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology changling petrochemical Engineering Design co.ltd.

A hierarchical beta zeolite synthesized by quasi-solid phase conversion method was characterized by BET.scanning electron microscope(SEM),transmission electron microscope(TEM),X-ray diffraction(XRD).temperature-programmed desorption of ammonia(NH_3-TPD),^(27)AI and ^(29)Si magic angle spinning nuclear magnetic resonance(^(27)Al and ^(29)Si MAS NMR),and its catalytic performance was compared with that of conventional microporous beta zeolite for liquid phase transalkylation of multi-secbutylbenzenes(MSBBs)with benzene.The results indicate that the hierarchical beta zeolite consists of nanosized crystals with a meso,microporous structure and has stronger acid strength than the microporous beta zeolite.The higher conversion of tri-secbutylbenzene(TSBB) and selectivity of sec-butylbenzene(SBB) are achieved on hierarchical beta zeolite than microporous beta zeolite,while the conversion of di-secbutylbenzene(DSBB) is slightly higher.The improvement of catalytic performance over hierarchical beta zeolite can be ascribed to the presence of mesopores,nanosized crystals and stronger acidity.

关键词：烷基转移 β沸石多层次丁苯魔角旋转核磁共振扫描电子显微镜透射电子显微镜 NH3-TPD

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Kinetic Study on Liquid-Phase Hydrodesulfurization of FCC Diesel in Tubular Reactors

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China Petroleum Processing & petrochemical Technology 2015年第2期17卷 1-8页

作者： Li Hua Yang Jinliang Weng Huixin Wang Jiming East China University of Science and Technology SINOPEC changling petrochemical company SINOPEC Group

According to the characteristics of FCC diesel, a technology of liquid-phase hydrodesulfurization of the diesel in tubular reactors was proposed and lab-scale experiments were carried out. A kinetic model for the hydrodesulfurization process was developed and verified. The model was utilized to predict the sulfur content of products under different operating conditions. The effects of temperature, space velocity, pressure, and hydrogen concentration on the desulfurization rate were investigated.

关键词：加氢脱硫技术管式反应器催化柴油动力学液相实验室规模加氢脱硫过程 FCC柴油

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Supercritical carbon dioxide extraction of CLA-ethyl ester

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Frontiers of Chemical Science and Engineering 2011年第1期5卷 102-106页

作者： Yingdi CHEN Peng XU Jian CHENG Key Laboratory for Green Chemical Process of Ministry of Education Wuhan Institute of TechnologyWuhan 430073China Hubei Key Lab of Novel Reactor&Green Chemical Technology Wuhan Institute of TechnologyWuhan 430073China changling petrochemical co.ltd. SINOPECYueyang 414012China

Supercritical carbon dioxide(SC-co_(2))extraction of conjugated linoleic acid(CLA)ethyl ester was investigated at pressures in the range of 9 to 10.5 MPa and temperature gradients ranging from 0℃ to 21℃.The content of CLA-ethyl ester in the fraction was analyzed with gas chromatography(GC).The experimental results indicated that the rate of extraction would rise with the increase of pressure when temperature gradient was given.Moreover,the extraction pressure had insignificant influence on the selectivity of CLA-ethyl ester in SCco_(2).When pressure was fixed,setting certain temperature gradient can improve the selectivity of CLA-ethyl ester in SC-co_(2),and CLA-ethyl ester can be concentrated more effectively than without a temperature gradient.The acid value and peroxide value of the fractions were reduced obviously,compared to the raw material.The optimal condition is pressure at 10 MPa and temperature gradient at 11℃.

关键词： supercritical carbon dioxide extraction CLAethyl ester temperature gradient

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Nickel and potassium co-modified β-Mo_2C catalyst for co conversion

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Journal of Natural Gas Chemistry 2009年第2期18卷 183-186页

作者： Minglin Xiang Juan Zou Debao Li Wenhuai Li Yuhan Sun Xichun She Hunan changling petrochemical S＆T Developing co. ltd Yueyang 414012 Hunan China State Key Laboratory of coal conversion Shanxi Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 Shanxi China

Nickel and potassium co-modified β-Mo2C catalysts were prepared and used for co hydrogenation reaction. The major products over β-Mo2C were C1-C4 hydrocarbons, only few alcohols were obtained. Addition of potassium resulted in remarkable selectivity shift from hydrocarbons to alcohols at the expense of co conversion over β-Mo2C. Moreover, it was found that potassium enhanced the ability of chain propagation with a higher C2＋OH production. Modified by nickel,β-Mo2C showed a relatively high co conversion, however, the products were similar to those of pure β-Mo2C. When co-modified by nickel and potassium,β-Mo2C exhibited high activity and selectivity towards mixed alcohols synthesis, and also the whole chain propagation to produce alcohols especially for the stage of C1 OH to C2OH was remarkably enhanced. It was concluded that the Ni and K had, to some extent, synergistic effect on co conversion.

关键词： β-Mo2C nickel potassium co conversion

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Single-step thermal carburization synthesis of supported molybdenum carbides from molybdenum-containing methyl-silica

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Journal of Natural Gas Chemistry 2011年第3期20卷 271-280页

作者： Juan Zou Minglin Xiang Bo How Dong Wu Yuhan Sun Hunan changling petrochemical S＆T Developing co. ltd. Yueyang 414012 Hunan China State Key Laboratory of coal conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 Shanxi China

A novel synthesis route to obtain highly dispersed molybdenum carbides in porous silica is described. The synthesis was carried out by a single-step heat treatment of molybdenum-containing and methyl-modified silica （Mo-M-SiO2） in argon atmosphere at 973 K. Mo-M-SiO2 precursor was facilely obtained via a one-pot synthesis route, using （NH4）6Mo7O24 4H2O （AHM） as molybdenum sources and polymethylhydrosiloxane （PMHS） as silica sources at the initial synthetic step. The optimal C/Mo molar ratio in reaction system for complete carburization of molybdenum species was 7. The carburization process of molybdenum species followed a nontopotactic route involving a MoO2 intermediate phase, which was evidenced by XRD, N2 adsorption-desorption and in situ XPS. Formation mechanism of Mo-M-SiO2 precursor was also proposed by observation of the reaction between AHM and PMHS with TEM. Furthermore, by adding TEOS into silica sources and adjusting TEOS/PMHS mass ratio, crystal phase of molybdenum carbides transferred from β-Mo2C to α-MoC1-x, and SiO2 structure changed from microporous to micro/mesoporous. Catalytic performances of samples were tested using co hydrogenation as a probe reaction. The supported molybdenum carbides exhibited high selectivity for higher alcohol synthesis compared with bulk β-Mo2C and α-MoC1-x.

关键词： molybdenum carbides porous silica single-step carburization one-pot synthesis co hydrogenation

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XPS study of potassium-promoted molybdenum carbides for mixed alcohols synthesis via co hydrogenation

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Journal of Natural Gas Chemistry 2010年第2期19卷 151-155页

作者： Minglin Xiang Debao Li Juan Zou Wenhuai Li Yuhan Sun Xichun She Hunan changling petrochemical S＆T Developing co. ltd. Yueyang 414012 Hunan China State Key Laboratory of coal conversion Shanxi Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 Shanxi China

The X-ray photoelectron spectroscopy （XPS） was used to investigate the surface characteristic of potassium-promoted or un-promoted both β-Mo2C and α-MoC1-x pretreated by syngas at different temperatures,and the promotional effect of potassium on the catalytic performance was also studied.XPS results revealed that the content of surface Mo and its valence distribution between β-Mo2C and α-MoC1-x were quite different.Promoted by potassium,the remarkable changes were observed for surface composition and valence of Mo distribution over β-Mo2C.Potassium had strong electronic effect on β-Mo2C,which led to a higher Mo4＋ content.On the contrary,potassium had little electronic effect on α-MoC1-x,and K-Mo interaction was weak.Therefore,Mo0 and Mo2＋ became the dominant species on the catalyst surface,and the Mo4＋ content showed almost no increase as the pretreatment temperature enhanced.In terms of catalytic performance of molybdenum carbides,the increase in Mo0 most likely explained the increase in hydrocarbon selectivity,yet Mo4＋ might be responsible for the alcohols synthesis.

关键词： molybdenum carbide potassium-promoted co hydrogenation

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Catalytic performance of Fe modified K/Mo_2C catalyst for co hydrogenation

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Journal of Natural Gas Chemistry 2011年第5期20卷 520-524页

作者： Minglin Xiang Dudu Wu Juan Zou Debao Li Yuhan Sun Xichun She Hunan changling petrochemical S＆T Developing co. ltd. Yueyang 414012 Hunan China School of Pharmacy Guangdong Medical College Dongguan 523808 Guangdong China State Key Laboratory of coal conversion Shanxi Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 Shanxi China

Fe modified and un-modified K/Mo2C were prepared and investigated as catalysts for co hydrogenation reaction. compared with K/Mo2C catalyst, the addition of Fe increased the production of alcohols, especially the C2＋OH. Meanwhile, considerable amounts of C5＋ hydrocar- bons and C2= -C4= were formed, whereas methane selectivity greatly decreased. Also, the activity and selectivity of the catalyst were readily affected by the reaction pressure and temperature employed. According to the XPS results, Mo4＋ might be responsible for the production of alcohols, whereas the low valence state of Mo species such as Mo^0 and/or Mo^2＋ might be account for the high activity and selectivity toward hydrocarbons.

关键词： K/Mo2C Fe promoter co hydrogenation

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