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| 1 | Synthesis of MOR/SAPO-11 Composite Molecular Sieve via Seed Crystallization for n-Alkane Hydroisomerization显示文摘n-Alkane isomerization is a critical reaction that can affect parameters in oil refining, such as the gasoline octane number and diesel oil solidifying point. In this study, a catalyst support, mordenite (MOR)/silicoaluminophosphate (SAPO)-11 composite zeolite with core/shell structure, was synthesized by hydrothermal method with MOR acting as the seed for crystallization. The crystal structure, elemental composition, surface area, pore volume, and acidity of the catalyst was thoroughly characterized. In addition, the catalytic performance of the as-obtained Pt/MOR/SAPO-11 in the hydroisomerization of n-dodecane was tested. The results indicated that the properties and catalytic performance of the composite molecular sieve were quite different from those of the pure zeolites and physical mixture of MOR and SAPO-11 (MOR+SAPO-11). Compared with the physical mixture, MOR and SAPO-11 were more tightly bound in MOR/SAPO-11 because of chemical bonding. Moreover, the acidity and pore structure were favorable to the catalytic hydroisomerization of n-dodecane. Pt/MOR/SAPO-11 exhibited higher isomerization activity than the Pt-loaded pristine MOR and MOR+SAPO-11. Thus, the core-shell composite molecular sieve has promising industrial applications as the catalyst support. | Sun Na Wang Haiyan Ma Yuxiang Yang Zhanxu Kang Lei | 2019 | China Petroleum Processing & Petrochemical Technology2019，21，2： | 6 |
| 2 | Effect of the Morphology of ZnO Support on the Desulfurization and Regeneration Performance of Ni/ZnO Catalyst显示文摘The Ni/ZnO desulfurization catalyst has been highly valued for its high desulfurization rate and low octane value loss. However, during the process of desulfurization, ZnO is prone to deactivation and the active component Ni is susceptible to agglomeration, which can affect the performance of the catalyst. In order to solve these problems, the modification of ZnO support has been extensively studied. The granular, short rod-shaped and nanowire-structured ZnO were synthesized by controlling the concentration of NaOH, and the desulfurization catalyst was prepared with ZnO serving as the support after loading of metallic Ni. The catalyst was characterized by X-ray diffraction, N2 adsorption-desorption, SEM, TEM and other analytical methods. The desulfurization performance of the catalyst was investigated with n-heptane - thiophene used as model compounds. Test results showed that the morphology and size of ZnO support has great influence on the desulfurization performance of the catalyst. Desulfurization catalyst prepared with nanowire-structured ZnO support has the best desulfurization performance, with its desulfurization rate reaching 98.2%. The result was achieved mainly due to the nanowire structure of ZnO support which could effectively restrain the agglomeration of metallic Ni on the surface and reduce the particle size of the active component of metallic Ni so as to improve its dispersion on the surface of the support. In addition, the nanowire structure can reduce the diffusion resistance of thiophene in the reaction process and provide a channel conducive to sulfur transfer and diffusion, which makes it perform well in the desulphurization reaction process and regeneration process. | Kang Lei Wang Haiyan Han Bing Li Shuanglin Sun Na Yang Zhanxu | 2019 | China Petroleum Processing & Petrochemical Technology2019，21，2： | 3 |
| 3 | A one-for-all strategy of polyimide coating layer for resolving the comprehensive issues of phosphorus anode显示文摘Phosphorus is a promising anode with high capacity (2596 mAh g^(-1)and 6075~6924 mAh cm^(-3)),low lithium-ion diffusion barrier (0.08 e V),and appropriate lithiation potential (~0.7 V vs Li+/Li).However,it faces the problems of huge volume expansion (~300%),low electronic conductivity (10^(-14)~10^(2)S cm^(-1)),soluble intermediates (lithium polyphosphides,Li_(x)Ps),degradation in air,and low thermal stability.In this work,phosphorus/carbon nanotube composites were coated with a polyimide layer,which plays the roles of a buffer layer to relieve the volume expansion of phosphorus,an obstruct layer to confine LixPs,an inert layer to prevent the degradation of phosphorus in air,a heat resistant layer to improve the thermal stability of the anode.The resulting composites (P/CNT@PI) display high capacity retention of798.1 m Ah g^(-1)after 150 cycles at 1 A g^(-1),achieving 17 times as much as the control sample (P/CNT). | Muyao Han Shaojie Zhang Yu Cao Chengyu Han Xu Li Yiming Zhang Zhanxu Yang Jie Sun | 2022 | Journal of Energy Chemistry2022，31，7： | 2 |
| 4 | A novel method for the preparation of submicron-sized LiNi 0.8 Co 0.2 O 2 cathode material显示文摘 | Zhanxu Yang Bei Wang Wensheng Yang Xun Wei | 2007 | Electrochimica Acta2007，，28： | 1 |
| 5 | A novel method for the preparation of submicron-sized LiNi 0.8 Co 0.2 O 2 cathode material显示文摘 | Zhanxu Yang Bei Wang Wensheng Yang Xun Wei | 2007 | Electrochimica Acta2007，，28： | 1 |
| 6 | Facile synthesis of nanostructured LiFePO_4/C cathode material for lithium-ion batteries显示文摘Nanostructured LiFePO4/C cathode material was prepared by FePO4·2H2O/C precursor by in situ restriction reaction.The synthesized LiFePO4/C cathode material presents a narrow distribution of nano-sized particles and exhibits an excellent electrochemical property with various rates.The facile synthesis route for the preparation of nano-sized LiFePO4 material has the particular advantage of simple synthesis process and low synthesis cost. | YANG ZhanXu QIAO QingDong KANG XiaoXue YANG WenSheng | 2012 | Chinese Science Bulletin2012，57，32： | 1 |
| 7 | Hierarchical SAPO-11 Molecular Sieve for n-Alkane Hydroisomerization Synthesized by Directing Agent Method显示文摘Silicoaluminophosphates SAPO-11 molecular sieves with small particle size and hierarchical pores were synthesized using the directing agent method.The effect of crystallization time on the particle structure,morphology,pore structure properties,and acid properties of SAPO-11 molecular sieves were investigated.Unlike the SAPO-11 molecular sieves synthesized with the conventional method,the results of XRD,SEM,BET and NH3-TPD analyses showed that the SAPO-11 molecular sieves synthesized by the directing agent method in a shorter crystallization time exhibited fine and uniform morphology.By increasing the crystallization time,the particle size of SAPO-11 molecular sieve was significantly reduced,and the mesoporous structure(intercrystalline pores)was formed.Furthermore,the external specific surface area and the total specific surface area reached 81.7 m^2/g and 192.0 m^2/g,respectively,which effectively reduced the pore mass transfer resistance and significantly increased the number of acid sites.The results of n-dodecane hydroisomerization revealed that the Pt/SAPO-11 prepared with the novel method exhibited higher catalytic activity and better hydroisomerization selectivity than that synthesized by the conventional hydrothermal method.Thus,the small particle molecular sieve showed a promising industrial application prospect to be used as catalyst support. | Meng Yuan Wang Haiyan Sun Na Yang Zhanxu Wang Yujia | 2020 | China Petroleum Processing & Petrochemical Technology2020，22，4： | 1 |
| 8 | Improvement of structural and electrochemical properties of com- mercial LiCoO2by coating with LaF3 显示文摘 | Yang Zhanxu Qiao Qingdong Yang Wensheng | 2011 | Electrochimica Acta2011，56，： | 1 |
| 9 | 显示文摘 | Yang Zhanxu Qiao Qingdong Yang Wensheng | 2011 | Electro- chimica Acta2011，56，13： | 1 |
| 10 | Density Functional Theory Calculations for the Evaluation of FePS3 as a Promising Anode for Mg Ion Batteries显示文摘FePS3,a classical 2D layered material with transition metal phosphorous trichalcogenides,was investigated as an anode material for Mg ion batteries.We used density functional theory to calculate the Mg storage properties of FePS3,such as Mg adsorption energy,theoretical specific capacity,average voltage,diffusion energy barriers,volume change,and electronic conductivity.The theoretical specific capacity of the FePS3 monolayer is 585.6 mA h/g with a relatively low average voltage of 0.483 V(vs.Mg/Mg^2+),which is favorable to a high energy density.The slight change in volume and good electronic conductivity of bulk FePS 3 are beneficial to electrode stability during cycling. | Yu Cao Fusheng Pan Huili Wang Zhanxu Yang Jie Sun | 2020 | Transactions of Tianjin University2020，26，4： | 0 |
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