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| 1 | 一种径向叠片磁障式转子双馈无刷电机的设计与性能分析显示文摘设计并试制了一台150kW/900r/min径向叠片磁障式转子双馈无刷电机。利用有限元法对原型电机的磁场分布、空载特性、负载时定子绕组感应电动势和电磁转矩特性等进行了分析计算,并对实验样机作为发电机运行时的几种运行模式进行了实验测试,结果显示制造的原型电机达到了设计的性能指标,在额定运行时电机本体的效率可达95%以上。 | 刘慧娟 Longya Xu | 2012 | 电工技术学报2012，27，7： | 16 |
| 2 | Highly selective ethylbenzene production through alkylation of dilute ethylene with gas phase-liquid phase benzene and transalkylation feed显示文摘A novel industrial process was designed for the highly selective production of ethylbenzene. It comprised of a reactor vessel, vapor phase ethylene feed stream, benzene and transalkylation feed stream. Especially the product stream containing ethylbenzene was used to heat the reactor vessel, which consisted of an alkylation section, an upper heat exchange section, and a bottom heat exchange section. In such a novel reactor, vapor phase benzene and liquid phase benzene were coexisted due to the heat produced by isothermal reaction between the upper heat exchange section and the bottom heat exchange section. The process was demonstrated by the thermodynamic analysis and experimental results. In fact, during the 1010 hour-life-test of gas phase ethene with gas phase-liquid phase benzene alkylation reaction, the ethene conversion was above 95%, and the ethylbenzene selectivity was above 83% (only benzene feed) and even higher than 99% (benzene plus transalkylation feed). At the same time, the xylene content in the ethylbenzene was less than 100 ppm when the reaction was carried out under the reaction conditions of 140-185 °C of temperature, 1.6-2.1 MPa of pressure, 3.0-5.5 of benzene/ethylene mole ratio, 4-6 v% of transalkylation feed/(benzene+transalkylation feed), 0.19-0.27 h-1 of ethene space velocity, and 1000 g of 3998 catalyst loaded. Thus, compared with the conventional ethylbenzene synthesis route, the transalkylation reactor could be omitted in this novel industrial process. | Shenglin Liu Fucun Chen Sujuan Xie Peng Zeng Xiyan Du Longya Xu | 2009 | Journal of Natural Gas Chemistry2009，18，1： | 11 |
| 3 | Thermal and hydrothermal stabilities of the alkali-treated HZSM-5 zeolites显示文摘有 micro-mesopore 的 HZSM-5 沸石层次孔被准备了由碱处理,和他们的热、热水的稳定性合成以后用 DTA, XRD,和 NH 3-TPD 描述技术被学习。比作未修改的沸石,因为 desilication 引起的中央毛孔的介绍,对待碱的 ZSM-5 沸石的热、热水的稳定性稍微被败坏。不过,对待碱的沸石框架能被维持直到温度增加了到 1175 ° C。 | Yuning Li Dong Liu Shenglin Liu Wei Wang Sujuan Xie Xiangxue Zhu Longya Xu | 2008 | Journal of Natural Gas Chemistry2008，17，1： | 10 |
| 4 | Review of Directly Producing Light Olefins via CO Hydrogenation显示文摘Directly making light olefins via CO hydrogenation is a promising process to obtain a non-petroleum based supply of alkenes. Limited by the ASF distribution function of Fischer-Tropsch synthesis,the yield of light olefins (C2-C4) can not reach the desired levels, which is a great challenge to overcome.Beginning with a brief introduction of F-T synthesis, this paper provides a review of current research,including thermodynamic analysis, the ASF distribution function, the reaction performance of CO hydro-genation and slurry reactor studies. The problems currently faced by this research area are presented atthe end of the article. | Chong Wang, Longya Xu, Qingxia WangDalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China | 2003 | Journal of Natural Gas Chemistry2003，12，1： | 6 |
| 5 | In Situ Regeneration of Mo/MCM-22 with 1%O_2 at Reaction Temperature显示文摘 | BAI Jie, XIE Sujuan, LIU Shenglin, XU Longya, LIN Liwu (State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, Liaoning, China) | 2003 | 催化学报2003，24，11： | 4 |
| 6 | Acidity effects of Hβ zeolite on olefin alkylation of thiophenic sulfur in gasoline显示文摘thiophenic 硫过程的石蜡完化在模型汽油被执行,用有象催化剂的不同 Si/Al 2 比率的 Hβ 沸石。特别地,它为 thiophene 完化,二甲苯完化和 hexene oligomerization 的催化能力上的 Hβ 沸石的酸性质的影响被调查。结果证明 Hβ 沸石的酸味与 Si/Al 2 比率的减少被增加,但是它的催化能力总是没被增加。事实上,它在 66 的 Si/Al 2 比率到达了最大的催化能力,并且在溪流 2 h 上的 60 ° C, 1.5 MPa, WHSV 3.0 h −1 和时间的反应条件下面。在比率, thiophene 的变换,二甲苯,和 oligomerized, hexene 分别地是 96.6% , 2.7% 和 2.8% 。最佳的 Si/Al 2 比率为 Hβ 沸石的催化表演存在。由调查使用的 Hβ 沸石催化剂的焦炭免职,最佳的 Si/Al 2 比率被归因于 carbocation 激活能力和 Hβ 沸石催化剂的氢转变能力的联合效果,这被发现了。 | Zekai Zhang Dong Liu Xiangxue Zhu Haiwei Yu Shenglin Liu Longya Xu | 2008 | Journal of Natural Gas Chemistry2008，17，1： | 4 |
| 7 | Differences between Zn/HZSM-5 and Zn/HZSM-11 zeolite catalysts in alkylation of benzene with dimethyl ether显示文摘HZSM-11 zeolite supported Zn catalysts with different Zn contents(xZn/HZSM-11A) were prepared. In the alkylation of benzene with dimethyl ether(DME) in a fixed bed reactor, the catalyst with Zn content of 6 wt%(6Zn/HZSM-11A) showed appropriate performance. Focus was put on the comparison between 6Zn/HZSM-5 and 6Zn/HZSM-11 with the same crystal size of 600–800 nm, and also with the similar BET surface area, micropore volume, Si/Al2 molar ratio, and acidity. In the alkylation of benzene with DME, the 6Zn/HZSM-11 showed better activity and stability, and especially enhanced the conversion of benzene and selectivities to xylene and trimethylbenzene, compared with the6Zn/HZSM-5. This was mainly related to the higher adsorption capacity and adsorption-desorption rates to the three adsorbates(benzene,m-xylene and 1,3,5-trimethylbenzene) over the 6Zn/HZSM-11 in comparison with the 6Zn/HZSM-5. | Hui Liu Huijuan Wei Wenjie Xin Chao Song Sujuan Xie Zhenni Liu Shenglin Liu Longya Xu | 2014 | Journal of Energy Chemistry2014，23，5： | 4 |
| 8 | Production of propene from 1-butene metathesis reaction on tungsten based heterogeneous catalysts显示文摘A new propene production route from 1-butene metathesis has been developed on heterogeneous 10WO3/Al2O3-HY catalysts with different HY contents.It is found that the catalysts play bi-functionally first for the isomerization of 1-butene to 2-butene and then for the cross-metathesis between 1-butene and 2-butene to propene and 2-pentene.The combination of HY zeolite and Al2O3 is prerequisite for the production of propene.The propene yield keeps increasing with the HY content in the range of 10-70 wt%,where 10WO3/Al2O3-70HY exhibits the highest propene yield.The MS-H2-TPR and MS-O2-TPO characterizations indicate that the increase of HY content in the catalysts weakens the interaction between W species and supports,whereas enhance the probability of coking on the metal species and acid sites. | Huijuan Liu Ling Zhang Xiujie Li Shengjun Huang Shenglin Liu Wenjie Xin Sujuan Xie Longya Xu | 2009 | Journal of Natural Gas Chemistry2009，18，3： | 3 |
| 9 | Shaped binderless ZSM-11 zeolite catalyst prepared via a dry-gel conversion method:Characterization and application for alkylation of benzene with dimethyl ether显示文摘Shaped binderless ZSM-11 zeolite catalysts were synthesized via a dry-gel conversion technique from 70ZSM-11/30 SiO_2mix extrudates. 1,6-hexanediamine combined with tetrabutylammonium bromide was proved to be the best structure directing agent for the synthesis of the binderless ZSM-11 catalyst, without adding other alkaline materials. The 70HZSM-11/30 SiO_2mix serials materials crystallized for different times were detected by X-ray diffraction(XRD), nuclear magnetic resonance(NMR), scanning electron microscopy(SEM), transmission electron microscopy(TEM), scanning transmission electron microscopy–energy dispersive spectroscopy(STEM–EDS) techniques, and so on. In order to investigate the possible crystallization mechanism, the textural and structural properties of 70HZSM-11/30 SiO_2mix serials samples were further characterized by N_2 adsorption–desorption. Acid properties were determined by temperature-programed desorption of NH_3(NH_3-TPD) and pyridine adsorption-infrared(Py-IR) measurements. In the alkylation of benzene with dimethyl ether, the serials catalysts exhibited different benzene conversions. 70HZSM-11/30 SiO_2mix showed the lowest benzene conversion while sample 70HZSM-11/30 SiO_2mix-6.5h synthesized only for 6.5h displayed a higher benzene conversion, even higher than the value over 70HZSM-11/30Al_2O_3mix. Extending the crystallization time, the obtained samples displayed the increased benzene conversion in general under the same reaction conditions. In the end, the relation of physicochemical properties with the reaction performance was investigated. | Wanshuo Zhang Shuang Zhang Wenjie Xin Hui Liu Yongchen Shang Xiangxue Zhu Shenglin Liu Longya Xu | 2017 | Journal of Energy Chemistry2017，26，3： | 3 |
| 10 | Synthesis of ZSM-35 Zeolite and Its Application in Skeletal Isomerization of 1-Hexene显示文摘 | XIE Sujuan, WANG Qingxia, XU Longya, WU Zhihua (State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, China) | 2000 | 催化学报2000，21，4： | 3 |
| 11 | 1-Butene isomerization and metathesis over Mo/mordenite-alumina: Factors influencing product distribution and induction period显示文摘Effects of space velocity, reaction temperature and support acidity on product distribution and induction period in 1-butene isomerization and metathesis over Mo/mordenite-alumina were investigated. As revealed by the catalytic performance results, induction period and objective product were closely related to the reaction conditions. Lower space velocity led to longer induction period and higher propene yield. The optimal reaction temperature for propene production is around 150C and it shifted to 100C for ethene production. 1-Butene auto-metathesis predominated in the reaction network if the support with lower degree of sodium exchanged. And propene gradually became the dominant product upon increasing the support sodium exchange degree. 6Mo/H 100 Na 0 M-30Al catalyst with a support of full sodium exchange degree exhibited the highest propene yield. | Xiujie Li Xiangxue Zhu Dazhou Zhang Fucun Chen Peng Zeng Shenglin Liu Sujuan Xie Longya Xu | 2013 | Journal of Energy Chemistry2013，22，1： | 3 |
| 12 | Pd/Hβ-zeolite catalysts for catalytic combustion of toluene:Effect of SiO_2/Al_2O_3 ratio显示文摘The effect of pure and high silica Hβ zeolites on the catalytic performance of toluene combustion over Pd/Hβ catalyst was evaluated.Pure and high silica β zeolites were prepared by direct synthesis procedures,then 0.1 wt% of palladium was impregnated on different Hβ zeolites via in-cipient wetness technique using palladium nitrate as the Pd source.The Pd/Hβ catalysts were characterized by XRD,N2 adsorption/desorption,H2O adsorption,NH3-TPD,H2-TPR and XPS techniques.With increasing the SiO2/Al2O3 ratio of β zeolite,the activity of the Pd/Hβ catalysts for toluene combustion increased clearly and the pure silica β zeolite supported Pd catalyst showed the best catalytic activity.The superior catalytic performance of Pd/β catalyst prepared from pure silica β zeolite was attributed to its high hydrophobicity and the preserving ability for PdO active species. | Zekai Zhang Longya Xu Zhanlong Wang Yujuan Xu Yinfei Chen | 2010 | Journal of Natural Gas Chemistry2010，19，4： | 2 |
| 13 | Cross metathesis of butene-2 and ethene to propene overMo/MCM-22-Al_2O_3 catalysts with different Al_2O_3 contents显示文摘A series of 3.0Mo/MCM-22-Al2O3 catalysts with γ-Al2O3 contents in the range of 0-100 wt%were prepared and applied in the metathesis reaction of ethene and butene-2.Addition of γ-Al2O3 did not affect the structure of MCM-22 zeolite as evidenced by XRD and N2 adsorption measurements.It was deduced from TPR experiments that γ-Al2O3 phase favored the formation of polymolybdate or multilayered Mo oxide,while more Al2(MoO4)3 species were generated over MCM-22 zeolites.Alumina content in the support was directly related to the metathesis activity of ethene and butene-2 to propene.Mo species with higher valence(Mo6+or Mo5+)contributed more to the excellent performance of catalyst than metallic Mo.The best catalyst activity and stability was obtained over 3.0Mo/(MCM-22-30%Al2O3)under the reaction condition of 1.0 MPa and 125℃ using N2 as the pretreatment gas. | Shenglin Liu Xiujie Li Wenjie Xin Sujuan Xie Peng Zeng Lixin Zhang Longya Xu | 2010 | Journal of Natural Gas Chemistry2010，19，5： | 2 |
| 14 | Effect of Reaction Temperature and Pressure on the Metathesis Reaction between Ethene and 2-Butene to Propene on the WO_3/Al_2O_3-HY Catalyst显示文摘在到丙烯的 ethene 和 2-butene 之间的换位反应上的反应温度和压力的效果在 WO3/| 上被学习 ?-Al2O3-HY 催化剂。这项活动被发现与提高的温度增加并且在 150 ¨ C 到达一个高原 240 ??6 号元素碳的化学符号。在那以后,这项活动经历显著减少在也高温。温度的效果被钨种类的氧化态阐明。评估结果也显示稳定性依赖于这个反应参数。中等压力(0.5 ¨ C 0.8 MPa ) 为稳定性是有利的,当时气压或也高压(> 1.0 MPa ) 败坏稳定性。为解释,紫外力,英尺红外, O2-TPO,和 TG,技术被用来描绘废催化剂。给词调音:换位;氧化钨催化剂;温度;压力;ethene;2-butene; | Shengjun Huang Shenglin Liu Wenjie Xin Sujuan Xie Qingxia Wang Longya Xu | 2006 | Journal of Natural Gas Chemistry2006，15，2： | 2 |
| 15 | Methane dehydro‐aromatization over Mo/MCM‐22 catalysts: a highly selective catalyst for the formation of benzene显示文摘 | Yuying Shu Ding Ma Longya Xu Yide Xu Xinhe Bao | 2000 | Catalysis Letters (-)2000，，12： | 2 |
| 16 | Calculation and measurement of radial and axial forces for a bearingless PMDC motor显示文摘 | Fengxiang Wang Xu Longya | 2000 | Conference Record-IAS Annual MeetingIEEE Industry Applications Society2000，，1： | 1 |
| 17 | A flexible active and reactive power control strategy for a variable speed constant frequency generating system显示文摘 | Tang Yifan Xu Longya | 1995 | IEEE Transactions on Power Electronics1995，10，4： | 1 |
| 18 | A new current model flux observer for wide speed range sensorless control of an induction machine 显示文摘 | Rehman H Derdiyok A Guven M K XU Longya | 2002 | IEEE Trans on P E2002，17，6： | 1 |
| 19 | An improved fluxobserver based on PLL frequency estimator for sensorless vector control of induction motors显示文摘 | Comanescu Mihai Xu Longya | 2006 | IEEE Transactions on Industrial Electronics2006，53，1： | 1 |
| 20 | An improved flux observer based on PLL frequency estimator for sensorless vector control of induction motors 显示文摘 | MIHAI C XU Longya | 2006 | IEEE Trans on Industrial Electronics2006，53，1： | 1 |
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