检索结果-南通市图书馆

同方期刊数据库

Syngas production from chemical looping reforming of ethanol over iron-based oxygen carriers: Theoretical analysis and experimental investigation

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2021年第10期34卷 123-131页

作者： Atif Abdalazeez wenju wang Siddig Abuelgasim School of Energy and Power Engineering Nanjing University of Science and TechnologyNanjing 210094China Department of Mechanical Engineering University of KassalaKassalaSudan

Chemical looping reforming(CLR)is a recent trend for syngas production,which has several merits compared to the conventional *** of the most important issues for CLR is to find low-cost material as oxygen carriers,so iron is a promising *** paper contributes to testing the thermodynamic ability of iron-based oxygen carrier for chemical looping reforming of ethanol(CLRE).Iron thermodynamically investigated in temperature 100–1300℃and excess oxygen number(φ)0–*** was found that the temperature andφhave an apparent effect on the gaseous composition produced from the *** in temperature within the range of 100–1300℃enhanced syngas generated and reduced coke formation and ***,increasedφ,particularly at higher temperatures,had also enhanced syngas production as well as reduced coke ***,increasingφfor values beyond one had decreased syngas and not significantly reduced coke ***,an experimental investigation was carried out in a fixed bed reactor for more in-depth verification of iron ability as an oxygen carrier through using magnetite ore(mainly Fe3O4).It found that the effect of temperature on syngas production was consistent with that calculated thermodynamically,as syngas increased with raising the temperature through the CLRE.

关键词： Syngas Chemical looping reforming Iron oxygen carrier Ethanol Coke formation Thermodynamic analysis

Yttria promoted metallic nickel catalysts for the partial oxidation of methane to synthesis gas

在线全文

学校读者我要写书评

暂无评论

Journal of Natural Gas Chemistry 2008年第4期17卷 344-350页

作者： Yaquan wang Xuebin Hong Bingbing Li wenju wang Dalin wang Key Laboratory for Green Chemical Technology School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China

A metallic Ni catalyst was prepared with nickel sponge, followed by acid treatment. It was further promoted with yttria by an impregnation method. The catalysts were characterized by SEM, BET, XRD, TPR, XPS, etc., and studied in the partial oxidation of methane to syngas. The characterization results showed that the yttria promoted metallic Ni catalysts had high specific surface area and more NiO. The reaction results showed that the yttria promoter increased the CH4 conversion and the selectivity for H2 and CO.

关键词： metallic nickel yttria catalytic partial oxidation of methane syngas

Green and Efficient Synthesis of 3-Pyrazolyl Indoles in Water

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2020年第5期36卷 847-852页

作者： ZHAO Yanhui YU Haifeng LIAO Peiqiu wang wenju College qf Chemistry Baicheng Normal UniversityBaicheng 137000P.R.China Jilin Province Key Laboratory of Organic Functional Molecular Design&Synthesis Faculty of ChemistryNortheast Normal UniversityChangchun 130024P.R.China

A green and efficient synthesis of 3-pyrazolyl indoles was developed by the eye 1 ocondensation reactionof β-ethylthio-β-indolyl-α,β-unsaturated ketones with semi carbazide hydrochloride as hydrazine equivalent in thepresence of 3 equiv. of PEG400(la/PEG mole ratio of 1:3) in reflux water. This procedure did not require toxichydrazine and product purification, eliminating the use of toxic liquid chemicals.

关键词： 3-Pyrazolyl indole Green synthesis Semicarbazide hydrochloride Polyethylene glycol Hydrazine equivalent

Stress relief and crystal face transition process contribute to the stability of zinc anodes

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第12期99卷 593-603页

作者： Yuqian Li Chunhui Peng Xiaotong Gao Huanrong Liu wenju wang School of Energy and Power Engineering Nanjing University of Science and TechnologyNanjing 210094JiangsuChina

Zn electrodes are suffering the dendrite growth owing to the enrichment of local space charge, distinct exposed face and residual stress. In this work, we investigated the crystal face properties and stress state of Zn foil through static energy calculations, dynamic crystal growth analysis and finite element simulation of stress states. Then thermal driven is deployed to modify the exposure face and residual stress of Zn foil, aiming for a dendrite-free electrode. The calculation of surface energies and simulation of crystal growth models for different crystal faces indicate that the(0 0 1) face can maintain stability during deposition. Inspired by this mechanism, the(1 0 1) exposed commercial Zn foil is modified by thermal processing. Firstly, the exposure level of the(0 0 1) face increases, though only the peak corresponding to the(0 0 2) crystal face is observed, due to the extinction effect of the densely packed plane(0 0 1) ***, the surface morphology becomes smooth and the stress is released with the progresses *** stress relief and crystal face transition process strengthen the uniformity of ion distribution, and increase the interface stability during the crystal growth, which reduce the defect sites in the *** a result, the Zn electrode exhibits tiny voltage hysteresis and outstanding cycle stability, which reveals improved electrochemical performance. Additionally, Li and Na can also be improved in exposed crystal faces and release strain energy through similar methods to enhance cycling stability.

关键词： Zn metal anode Dendrite free Exposure of crystal-face Stress relief Stable deposition

Accounting and Responsibility Allocation on Carbon Emissions Embodied in International Trade

在线全文

学校读者我要写书评

暂无评论

China Economist 2012年第2期7卷 50-59页

作者： wang wenju Xiang Qifeng Economics School Capital University of Economics and BusinessBeijingChina Statistics and Mathematics School Yunnan University of Finance and EconomicsKunmingChina

This paper calculated the scale of carbon emissions embodied in the import and export of the world＇s major countries based on input-output principles and international trade data, as well as data on various countries＇carbon emissions in 2005 from domestic consumption and emissions embodied in trade. The results illustrate that, because of international trade, consumers in developed countries should bear the responsibility for a large portion of CO2 emissions. The researchers separated the net transfer balance of embodied emissions in international trade according to four different effects： size effect, exchange rate effect, structural effect, and pure technical effect, all of which favor the sharing of responsibilities between producers and consumers.

关键词： embodied carbon emissions international trade net transfer Logarithmic an Divisia Index (LMDI)JEL: Q48

Effect of the Cool System on Internal Stress of CaO-Al_2O_3-SiO_2 Glass-ceramic System

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2007年第4期22卷 760-763页

作者：何峰 Key Laboratory of Silicate Materials Science and Engineering of Ministry of Education(Wuhan University of Technology)

The samples were attained through altering the cooling system of producing glass-ceramics. The X-ray diffraction was used to test the stress value of different samples. The relation of the cooling system and internal stress were also investigated. The experimental results show that the stress of glass-ceramic had a close relation with starting cool temperature. Above 800 ~C, glass-ceramic could be accelerated cooling and did not bring stress. Temperature between 500 ℃ and 800℃ was an important temperature range of the formation of stress in glass-ceramic, in which the glass-ceramic stress would change obviously. Cool system was the key on how to control and eliminate internal stress in order to reduce the destroy of materials crated by internal stress. In addition, glass particles size increase, glass-ceramic stress increase in consequent.

关键词： CaO-Al203-SiO2 system glass-ceramic internal stress cooling system

Pt掺杂碳纳米管吸附气体小分子的DFT计算

在线全文

学校读者我要写书评

暂无评论

化学学报 2010年第23期68卷 2389-2394页

作者：尚威王文举王嵩白城师范学院化学系白城137000 占林大学理论化学研究所理论化学计算国家重点实验室长春130061

利用B3LYP/LANL2DZ方法对Pt掺杂(5,5)单壁碳纳米管(SCNT)吸附SO2,HCHO和CO2三种气体小分子进行了详细的理论计算.通过分析吸附气体分子前后Pt掺杂SCNT的几何结构、电子态密度变化、前线轨道成分HOMO-LUMO能隙和红外光谱特征,给出了SCNT... 详细信息

利用B3LYP/LANL2DZ方法对Pt掺杂(5,5)单壁碳纳米管(SCNT)吸附SO2,HCHO和CO2三种气体小分子进行了详细的理论计算.通过分析吸附气体分子前后Pt掺杂SCNT的几何结构、电子态密度变化、前线轨道成分HOMO-LUMO能隙和红外光谱特征,给出了SCNT-Pt是否有潜力检测这三种气体分子的理论依据.

关键词：单壁碳纳米管气体传感器过渡金属掺杂

在线全文

学校读者我要写书评

暂无评论

配电网的回路阻抗法潮流计算与仿真可视化

同济大学学报（自然科学版） 2012年第3期40卷 459-467页

作者：王文举李光耀同济大学电子与信息工程学院上海201804

提出了一种用于配电网快速潮流计算和仿真信息可视化的新方法:结合十字链表与关联矩阵,给出了阻抗矩阵自动生成算法,并可以任意顺序求解各支路电流和各内节点电压;提出了基于right-looking LU分解法的并行高斯消去算法,利用GPU(图形处理... 详细信息

提出了一种用于配电网快速潮流计算和仿真信息可视化的新方法:结合十字链表与关联矩阵,给出了阻抗矩阵自动生成算法,并可以任意顺序求解各支路电流和各内节点电压;提出了基于right-looking LU分解法的并行高斯消去算法,利用GPU(图形处理器)加速求解复系数回路阻抗方程组;采用GIS(地理信息系统)和虚拟现实技术,对潮流计算结果进行仿真可视化.仿真算例表明,该方法对节点编号无特殊要求,适用于有环、无环的配电网潮流计算,具有计算速度快、精度高、仿真结果显示直观形象的优点.

关键词：配电系统潮流计算信息可视化十字链表图形处理器(GPU)

在线全文

学校读者我要写书评

暂无评论

基于深度学习的三维点云语义分割方法研究

计算机工程与应用 2021年第23期57卷 18-26页

作者：王涛王文举蔡宇上海理工大学上海200093

综述了基于深度学习的三维点云语义分割方法的研究进展。利用文献分析法,按照数据的表现形式对基于深度学习的三维点云语义分割的方法进行阐述。探讨了近些年的国内外发展现状,分析了目前相关方法的优缺点,并展望了未来发展的趋势。深... 详细信息

综述了基于深度学习的三维点云语义分割方法的研究进展。利用文献分析法,按照数据的表现形式对基于深度学习的三维点云语义分割的方法进行阐述。探讨了近些年的国内外发展现状,分析了目前相关方法的优缺点,并展望了未来发展的趋势。深度学习的加入在点云语义分割技术研究上发挥着越来越重要的作用,推动了制造与包装等领域趋向于智能信息化。根据各类方法的优缺点,利用深度学习技术构建出基于投影、体素、多视图以及直接基于点云的2D-3D组合语义分割框架模型是未来的一个重要研究方向。

关键词：计算机视觉智能包装深度学习三维点云语义分割