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Hydrocracking diversity in n-dodecane isomerization on Pt/ZSM-22 and Pt/ZSM-23 catalysts and their catalytic performance for hydrodewaxing of lube base oil

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Petroleum Science 2020年第6期17卷 1752-1763页

作者： Shan-Bin Gao Zhen Zhao Xue-Feng Lu Ke-Bin Chi Ai-Jun Duan Yan-Feng Liu Xiang-Bin Meng Ming-Wei Tan Hong-Yue Yu Yu-Ge Shen Meng-Chen Li State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Petrochemical Research Institute PetroChina Company LimitedBeijing 100195China

Nobel metallic Pt/ZSM-22 and Pt/ZSM-23 catalysts were prepared for hydroisomerization of normal dodecane and hydrodewaxing of heavy waxy lube base *** hydroisomerization performance of n-dodecane indicated that the Pt/ZSM-23 catalyst preferred to crack the C-C bond near the middle of n-dodecane chain,while the Pt/ZSM-22 catalyst was favorable for breaking the carbon chain near the end of *** a result,more than 2%of light products(gas plus naphtha)and3%more of heavy lube base oil with low-pour point and high viscosity index were produced on Pt/ZSM-22 than those on Pt/ZSM-23 while using the heavy waxy vacuum distillate oil as feedstock.

关键词： Isomerization Hydrocracking Catalysts Pt/ZSM-22 Pt/ZSM-23 dodecane Lube base oil

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Preparation and Characterization of Pt-Sn/SBA-15 Catalysts and Their Catalytic Performances for Long Chain Alkane Dehydrogenation

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Chinese Journal of Chemical Engineering 2008年第5期16卷 740-745页

作者：卢泽湘季生福刘辉李成岳 State Key Laboratory of Chemical Resources Engineering Beijing University of Chemical Technology Beijing 100029 China

A series of the Pt-Sn/SBA-15 catalysts were prepared and their properties characterized by using X-ray powder diffraction （XRD）, N2 adsorption-desorption, high resolution transmission electron microscope, X-ray photoelectron spectroscopy （XPS） and H2-temperature programmed reduction. Their performances in long chain alkane dehydrogenation were evaluated in a fixed-bed microreactor with dodecane as a model alkane. The results indicated that SBA-15 maintained the well-order mesoporous structure during the reaction. The performance of the catalyst was found not dominated by its textural properties, but by the molar ratio of Sn to Pt which governed the degree of Sn reduction. Owing to the highest degree of Sn reduction, 1% （by mass） Pt-1.8% （by mass） Sn/SBA-15 showed the best catalytic activity. At 0.1 MPa and 470℃, the molar ratio of hydrogen to alkane at 4, and liquid hourly space velocity （LHSV） 20 h^-1, the dodecane conversion is 10%, and the dodecene selectivity is about 70%.

关键词： SBA-15 catalyst PtSn alloy dodecane dehydrogenation

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Synthesis and Application of Oil-Soluble Red Dyes Derived from p-n-Alkyl Aniline

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Materials Sciences and Applications 2014年第8期5卷 485-490页

作者： Yi-Fen Chiang Yu-Chou Chao Institute of Organic and Polymer Materials National Taipei University of Technology Taipei Chinese Taipei

In this study, the azo red dyes derived from p-n-alkyl aniline by the introduction of different alkyl groups having high solubility in dodecane were synthesized. Results indicated that the elementary properties of red oil inks were 1) non-polarity;2) low viscosity (<3.0 cps);3) specified surface tension (<30 mN/m);4) intensity of visible absorption covering 480 - 540 nm;5) hue close to standard red (CIE(x, y) = 0.67, 0.33). We can conclude that these azo red dyes are applicable for electrowetting displays.

关键词： Oil-Soluble Red Dyes dodecane Electrowetting Display

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Novel phase change composites with low meiting temperature alkanes stabilized in ordered mesoporous cabon（CMK-8）

Novel phase change composites with low meiting temperature a...

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2015年中国化工学会年会

作者： Qi Zhang Jian Liu Xiaoming Fang Zhengguo Zhang Key Laboratory of Enhanced Heat Transfer and Energy Conservation the Ministry of EducationSchool of Chemistry and Chemical Engineering South China University of Technology

Phase change material is one of the most promising materials in thermal management industry. Here, a novel form-stable low-temperature phase change composite is successfully prepared. The paraffin（dodecane） is confined in the ordered mesoporous cabon（CMK-8） by impregnation. The as-prepared composite is determined by SEM, FT-IR and XRD. The results show that the paraffin is mostly encapsulated in the pores of CMK-8 and partly adhered to the surface of CMK-8 without chemical reaction. The DSC measurements indicate that the melting temperature and latent heat of the composite are-10.54 °C and 79.83 J·g-1, respectively. The encapsulation ratio of paraffin is calculated to be 46.5% from the results of the DSC measurements, which is matching with the thermogravimetric analysis. Hence, the composite shows great thermal storage/release performance. Furthermore, the phase change composite could maintain its phase transition perfectly after 50 melting-freezing cycles, and no leakage of dodecane was observed by further SEM observation. Hence, the CMK-8 has great potential as robust material for phase change composites and its based new phase change materials are promising in the practical heat management systems.

关键词： Phase change composite CMK-8 dodecane thermal storage/release performance

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