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Chemical looping reforming of the micromolecular component from biomass pyrolysis via Fe_(2)O_(3)@SBA-16

International Journal of Coal Science & Technology 2024年第3期11卷 120-134页

作者： Yunchang Li Bo zhang Xiantan Yang Bolun Yang shengyong zhang Zhiqiang Wu Shaanxi Key Laboratory of Energy Chemical Process Intensification School of Chemical Engineering and TechnologyXi’an Jiaotong UniversityXi’an710049ShaanxiPeople’s Republic of China

To solve the problems of low gasification efficiency and high tar content caused by solid–solid contact between biomass and oxygen carrier in traditional biomass chemical looping gasification *** decoupling strategy was adopted to decouple the biomass gasification process,and the composite oxygen carrier was prepared by embedding Fe_(2)O_(3) in molecular sieve SBA-16 for the chemical looping reforming process of pyrolysis micromolecular model compound methane,which was expected to realize the directional reforming of pyrolysis volatiles to prepare hydrogen-rich *** analysis of the reaction system was carried out based on the Gibbs free energy minimization method,and the reforming performance was evaluated by a fixed bed reactor,and the kinetic parameters were solved based on the gas–solid reaction *** analysis verified the feasibility of the reaction and provided theoretical guidance for experimental *** experimental results showed that the reaction performance of Fe_(2)O_(3)@SBA-16 was compared with that of pure Fe_(2)O_(3) and Fe_(2)O_(3)@SBA-15,and the syngas yield was increased by 55.3%and 20.7%respectively,and it had good cycle *** analysis showed that the kinetic model changed from three-dimensional diffusion to first-order reaction with the increase of *** activation energy was 192.79 kJ/mol by *** paper provides basic data for the directional preparation of hydrogen-rich syngas from biomass and the design of oxygen carriers for pyrolysis of all-component chemical looping reforming.

关键词： Biomass pyrolysis Methane Chemical looping reforming Oxygen carrier Kinetic analysis

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Electrocatalytic Multicomponent Cascade Cross-Coupling for the Synthesis of Chalcogenosulfonates

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Chinese Journal of Chemistry 2024年第17期42卷 2049-2055页

作者： Zhiheng Zhao Hongyan Yan Yaqin Zhou Wei Xue Lijun Gu shengyong zhang State Key Laboratoryof Green Pesticide Key Laboratoryof Green Pesticide and Agricultural BioengineeringMinistry of EducationCenter for R&D of Fine Chemicals of Guizhou UniversityGuiyangGuizhou 550025China Schoolof Pharmacy Air Force Medical UniversityShaanxiXi'anShaanxi 710032China

An electrocatalytic multicomponent cascade cross-coupling for the synthesis of chalcogenosulfonates has been *** approach does not require the use of transition metals,acids,and external *** gentle conditions and tole... 详细信息

关键词： Electrochemical catalysis Synthetic methods Radical Multi-component reaction Chalcogenosulfonates Tellurium

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Nonlinear Finite Element Analysis of Thin-Walled Beam on Pre- and Post-Buckling Stiffness and Gauge Sensitivity Index

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Journal of Applied Mathematics and Physics 2022年第5期10卷 1432-1442页

作者： shengyong zhang Department of Mechanical and Civil Engineering College of Engineering and Sciences Purdue University Northwest Hammond USA

Lightweight design has a significant impact on reducing fuel consumption and harmful emission of conventional vehicles and improving driving range of electric vehicles. Reducing the thickness of components in vehicle bodies and closures is an efficient approach for weight reduction. Thickness reduction, however, will reduce structural stiffness, especially in the presence of lateral displacements of buckling when critical stress is reached. In this paper, nonlinear FEA models of a thin-walled beam with variable thickness are developed for calculating the changes of beam stiffness as to thickness reduction in the pre- and post-buckling stages. Next, these stiffness values are used to calculate gauge sensitivity of the beam, which changes with respect to beam thickness changes. It is concluded that the presence of buckling will reduce the beam stiffness, worsen the stress uniformity, and increase the gauge sensitivity value of the beam.

关键词： FEA Local Buckling Gauge Sensitivity Thin-Walled Structures

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Nonlinear Finite Element Analysis and Optimum Design of Spot-Welded Joints and Weld-Bonded Joints

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Journal of Applied Mathematics and Physics 2020年第9期8卷 1715-1728页

作者： shengyong zhang Department of Mechanical and Civil Engineering College of Engineering and Sciences Purdue University Northwest Westville USA

Resistance spot welding and hybrid weld bonding have wide applications in the body work construction within the automobile industry. The integrity of the spot welds and applied adhesives determines the body assembly rigidity and dynamic performance. Incorporating contact nonlinearity and geometric nonlinearity, finite element analysis (FEA) have been carried out to investigate the structural stiffness and strength of both spot-welded and weld-bonded assemblies. Topology optimization has been performed to reveal the distributions of material effectiveness in the overlap regions and suggest a feasible method for removing underutilized material for weight reduction. Design optimization has been conducted with an aim to reduce the maximum von Mises stress in the assembly to minimum by choosing optimum values for a set of design variables, including the weld spacing, weld diameter and overlap width.

关键词： Finite Element Analysis Optimum Design Spot-Welded Joint Weld-Bonded Joint Lightweight Design

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Synthesis and application of highly sensitive fluorescent probe for Hg2＋ regulated by sulfur

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Chinese Chemical Letters 2017年第10期28卷 2014-2018页

作者： Siyue Ma Linyang Li Mengyao She Yan Mo shengyong zhang Ping Liu Jianli Li Ministry of Education Key Laboratory of Synthetic and Natural Functional Molecule Chemistry College of Chemistry & Materials Science Northwest University Xi'an 710127 China

Rhodamine-based fluorescent probe is widely used in chemical analysis, environmental analysis and life sciences area due to their excellent optical properties. Based on the thiophilic property of Hg2＋, using C = S structural motif as the core segment, our group have designed and synthesized three novel probes containing cinnamyl aldehyde with different substituents, exhibiting high selectivity and excellent sensitivity. The structure-property relationships of these probes have been investigated that the optical change caused by electron withdrawing effect and heavy atom effect. Furthermore, these Hg2＋ probes could be applied in living mice imaging, which provide a promising tool for quantitative mercury（Ⅱ） ion imaging in living organism.

关键词： Fluorescent probe Rhodamine 6G Mercury(Ⅱ) ion Electronic effect Biological application

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Structural modification of BODIPY: Improve its applicability

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Chinese Chemical Letters 2019年第10期30卷 1815-1824页

作者： Mengdi Liu Siyue Ma Mengyao She Jiao Chen Zhaohui Wang Ping Liu shengyong zhang Jianli Li Ministry of Education Key Laboratory of Synthetic and Natural Functional Molecule Chemistry College of Chemistry & Materials Science Northwest University

BODIPY has been considered a potential scaffold because of their neutral total charge, sharp absorption,and emission with high fluorescence quantum yield. However, the drawback of emission wavelength at less than 600 nm and hydrophobicity limit its application. One of the extremely interesting properties of BODIPY is that small modifications to their structures could be able to tune their properties, mainly including the absorption/emission wavelength and the hydrophilicity. This review focuses on the modification at different positions of BODIPY to improve the water-solubility and emission wavelength that describe their spectral, photophysical properties and applicability, which is helpful for the researchers to rationally design BODIPY dyes to adapt a wide range of applications.

关键词： BODIPY Near-infrared Water solubility Modification Application

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Construction and regulation of imidazo[1,5-a]pyridines with AIE characteristics via iodine mediated Csp^(2)-H or Csp-H amination

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Chinese Chemical Letters 2021年第10期32卷 3083-3086页

作者： Jun zhang Mengyao She Lang Liu Mengdi Liu Zhaohui Wang Hua Liu Wei Sun Xiaogang Liu Ping Liu shengyong zhang Jianli Li Ministry of Education Key Laboratory of Synthetic and Natural Functional Molecule Chemistry College of Chemistry&Materials ScienceNorthwest UniversityXi’an 710127China Lab of Tissue Engineering Provincial Key Laboratory of Biotechnology of ShaanxiMinistry of Education Key Laboratory of Resource Biology and Modern BiotechnologyThe College of Life SciencesFaculty of Life and Health ScienceNorthwest UniversityXi’an 710127China Fluorescence Research Group Singapore University of Technology and DesignSingapore 487372Singapore

The widespread applications of aggregation-induced emission luminogens(AIEgens)inspire the creation of AIEgens with novel structures and *** this work,we focused on the direct and efficient synthesis of a new type of AIEgens,imidazo[1,5-a]pyridicne derivatives,via iodine mediated cascade oxidative Csp^(2)–H or Csp–H amination route from phenylacetylene or styrenes under mild *** resulted compounds showed excellent AIE characteristics with tunable maximum emissions,attractive bioimaging performance,and potential anti-inflammatory activity,which exert broad application prospects in material,biology,medicine,and other relevant areas.

关键词： Aggregation-induced emission(AIE) Imidazo[1,5-a]pyridicnes Iodine Bioimaging Anti-inflammatory

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Parametric CAD Modelling of Aircraft Wings for FEA Vibration Analysis

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Journal of Applied Mathematics and Physics 2021年第5期9卷 889-900页

作者： shengyong zhang Mike Mikulich Department of Mechanical and Civil Engineering College of Engineering and Sciences Purdue University Northwest Westville USA

Excessive vibration of aircraft wings during flight is harmful and may cause propagation of existing cracks in the material, leading to catastrophic failures as a result of material fatigue. This study investigates the variations of modal characteristics of aircraft wings with respect to changes in the structural configurations. We develop parametric Computer-Aided Design (CAD) models to capture new design intend on the aircraft wing architectures. Subsequent Finite Element Analysis (FEA) based vibration analysis is performed to study the effects of architecture changes on the wing’s natural frequencies and mode shapes. It is concluded that the spar placement and the number of ribs have significant influence on the wing’s natural vibration properties. Integrating CAD modelling and FEA vibration analysis enables designers to develop alternative wing architectures to implement design requirements in the preliminary design stage.

关键词： Parametric Modelling CAD Aircraft Wings FEA Vibration Analysis

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FEA-Based Fatigue Life Assessment of Cycloidal Displacement Cam and Flat-Faced Follower Mechanism

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Modern Mechanical Engineering 2024年第2期14卷 51-56页

作者： shengyong zhang Krishnajith Theril Department of Mechanical and Civil Engineering College of Engineering and Sciences Purdue University Northwest Hammond USA

Cam-followers provide reliable and controlled motions in various mechanical systems. Due to the highly fluctuating load between the cam and follower in operation, the cam-follower may be subjected to a high risk of contact fatigue failure. This paper assesses the fatigue life of a cycloidal displacement cam and a flat-faced follower under the defined loads and constraints. Computer-aided design (CAD) model of the cam-follower is developed in CATIA software and imported to ANSYS software for finite element analysis (FEA) of fatigue life. MATLAB programming is developed for determining the appropriate spring constant and pre-load force to always keep the cam and follower in contact. The fatigue life of the cam-follower has been estimated under the specified operating conditions. The analysis method can be applied to investigate the fatigue life of cams with other profiles, including the modified trapezoidal functions, polynomial functions, etc.

关键词： Cam-Follower CAD FEA Fatigue Life

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A Comparative Review:2010 Middle East Books

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Asian Journal of Middle Eastern and Islamic Studies 2010年第3期4卷 103-120页

作者： zhang shengyong Michael H.PROSSER Dezhou University&Shanghai International Studies University

Books in 2010 by Stephen Kinzer,Andrew ***,and Robert ***,major writers on the Middle East and Islam,have clearly articulated the crisis facing both critical areas of the Middle East and Islam,especially as they affect the international relations of such countries as the United *** traces the development of Turkey toward a modernizing secular democracy and Iran toward a traditional Islamic *** proposes a series of initiatives for the United States to utilize to make them allies,as well as to help solve the crisis between Israel and ***“the Iran threat”to America and other Western countries,the very conservative McCarthy claims that Islam’s“Grand Jihad”is directed not only toward other Western countries but particularly against the United *** equates Islam as aligned with“the Left”and calls the Obama administration a major part of a socialistic“Left”which enables Islam to defeat American Christian values and heritage from *** claims that Islam chose irrationality over rationality in its domestic and foreign affairs over a millennium ago,leading to a very illusive peace in the Middle East,an area where scientific exploration is nearly dead,translating fewer books in the last thousand years than Spain in a single year,and why Muslims see natural disasters as Allah’s direct retribution for non-Islamic,and thus impure behavior toward Allah.

关键词： Iran Islamic Crisis Islamic Fundamentalism Jihad “Shar’ia” ”Umma”

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