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| 1 | Kinetic and Thermodynamic Studies on Raney Ni/Al2O3 Adsorption for Deep Desulfurization of Benzene Stream显示文摘How to remove trace amount of sulfur in benzene is of significance,and deep desulfurization by Ni-containing absorbents is an efficient and promising method.In this paper,The Raney Ni/Al2 O3 adsorbent was prepared and its kinetic and thermodynamic characteristics on adsorptive desulfurization of benzene were studied.The results showed that Raney Ni/Al2 O3 adsorbent exhibited good adsorption performance.The equilibrium isotherms indicated that the adsorption of thiophene over the Raney Ni/Al2 O3 adsorbent complied with the Freundlich model.The results of adsorption kinetics studies showed that the pseudo-second-order kinetics equation was more advantageous than the pseudo-first-order kinetics equation in describing the adsorption kinetics of thiophene on Raney Ni/Al2 O3.The rate constant value(kp)was positively correlated with the temperature whereas the adsorption mass transfer process was mainly determined by the intraparticle and film diffusion.The adsorption thermodynamic analysis proved that△G^0<0,△H^0>0,and△S^0>0,implying that the adsorption was a spontaneous,entropy-increasing and endothermic process. | Cao Yongzheng Luo Guohua Zhang Lanxi Xu Xin Jin Haibo Dong Sen Guo Xuehua | 2020 | China Petroleum Processing & Petrochemical Technology2020，22，2： | 2 |
| 2 | Nonlinear stability of the rotating Bénard problem,the case Pr=1显示文摘 | KAISER R XU Lanxi | 1998 | Nonlinear Differential Equations Application1998，5，： | 1 |
| 3 | A numerical simulation of flow between two rotating coaxial frustum cones显示文摘 | Xiaofei Xu Lanxi Xu | 2008 | Communications in Nonlinear Science and Numerical Simulation2008，，6： | 1 |
| 4 | A carbazole-hemicyanine dye based ratiometric fluorescent probe for selective detection of bisulfite(HSO_3^-)in cells and C. elegans显示文摘Bisulfite(HSO_3) is an important sulfur dioxide(SO_2) derivative, which plays a major role in many physiological processes and is also closely associated with a variety of diseases. Thus the development of highly selective and sensitive fluorescent probes is essential to detect HSO_3 in living cells. In this work,we report the synthesis and analysis of a ratiometric fluorescent probe for selective detection of HSO_3 based on the 1,4-nucleophilic addition reaction with the carbazole as an electron donor(D) and aldehyde group as an electron acceptor(A). The addition of HSO_3 and other ions to our probe can be observed by UV vis and fluorescence spectrometry. Our investigation proved that the probe is highly selective and sensitive for HSO_3 and ratiometric changes. Moreover, the probe has good cell permeability and was successfully applied to the detection of exogenous HSO_3 in Hela cells and C. elegans. | Keying Bi Rui Tan Ruiting Hao Lanxi Miao Yanqi He Xianghua Wu Junfeng Zhang Rui Xu | 2019 | Chinese Chemical Letters2019，30，3： | 1 |
| 5 | Research on Hydrogenolysis of Glycerol to 1, 2-Propylene Glycol by Using Supported Raney-Cu/Al2O3显示文摘New supported Raney-Cu catalyst was prepared from pseudo-boehmite powder and copper aluminum alloy powder. It could be used in a continuous-flow fixed-bed reactor and it was also a good catalyst for hydrogenolysis of glycerol to propylene glycol after the two raw materials were processed by the following procedures: molding, drying, calcination, and leaching. XRD, H2-TPR, as well as SEM technique were employed to study the physicochemical properties of the catalysts, and the hydrogenolysis of glycerol to 1,2-propylene glycol (1,2-PDO) was used as a probe to evaluate the performance of supported skeletal copper catalysts. The test result indicated that CuAl2 was the main crystal phase of precursor after the dried strips were calcined at 850 °C in air. A part of CuAl2 was oxidized to α-Al2O3, which was the main contributor to the strength of Raney-Cu/Al2O3, while the remaining CuAl2 was converted to active skeletal copper after the leaching process. The effects of reaction temperature, hydrogen pressure, LHSV, hydrogen-oil ratio, glycerol concentration, and alkaline additives on the catalytic performance were studied in water or ethanol, respectively. Conversion of glycerol and selectivity of 1,2-PDO were 30.9% and 91.4% in water, or 99.0% and 73.6% in the ethanol system, respectively, when the reaction was performed at a temperature of 215 °C, a H2 pressure of 3 MPa, a LHSV of 1.0 h-1, a hydrogen-oil ratio of 500, and a glycerol concentration of 20%(ethyl alcohol solution). | Zhang Lanxi Cao Yongzheng Wang Huiguo Li Ning Luo Guohua Xu Xin | 2019 | China Petroleum Processing & Petrochemical Technology2019，21，2： | 0 |
| 6 | On the Nature of Standards and Patents显示文摘Introduction ’Standard’ and ’patent’ are the buzz words in China’s information and communication technology(ICT) industry. While the government has expressed its intention to promote standardization and patent protec- tion, what direction should enterprises especially domestic ICT companies take? What is the role of govern- ment in standardization, when different parties have different, often conflicting, voices?This article reviews and refines the nature of standards and patents,and answers the above questions. | Bing WANG(Professor),Xu LI(Assistant Professor),Lanxi XIONG(LLM)Research Center for Intellectual Property Law,School of Law Tsinghua University,Beijing,PRC | 2008 | China Standardization2008，53，3： | 0 |
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