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Review of Iron-Based Catalysts for Carbon Dioxide Fischer-Tropsch Synthesis

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Transactions of Tianjin University 2024年第2期30卷 178-197页

作者： Ji-Yue Jia Yu-ling shan Yong-Xiao Tuo Hao Yan Xiang Feng De Chen State Key Laboratory of Heavy Oil Processing China University of PetroleumQingdao 266580China College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042China Department of Chemical Engineering Norwegian University of Science and Technology7491 TrondheimNorway

Capturing and utilizing CO_(2)from the production process is the key to solving the excessive CO_(2)emission problem. CO_(2)hydrogenation with green hydrogen to produce olefins is an effective and promising way to utilize CO_(2)and produce valuable chemicals. The olefins can be produced by CO_(2)hydrogenation through two routes, i.e., CO_(2)-FTS (carbon dioxide Fischer- Tropsch synthesis) and MeOH (methanol-mediated), among which CO_(2)-FTS has significant advantages over MeOH in practical applications due to its relatively high CO_(2)conversion and low energy consumption potentials. However, the CO_(2)-FTS faces challenges of difficult CO_(2)activation and low olefins selectivity. Iron-based catalysts are promising for CO_(2)-FTS due to their dual functionality of catalyzing RWGS and CO-FTS reactions. This review summarizes the recent progress on iron-based catalysts for CO_(2)hydrogenation via the FTS route and analyzes the catalyst optimization from the perspectives of additives, active sites, and reaction mechanisms. Furthermore, we also outline principles and challenges for rational design of high-performance CO_(2)-FTS catalysts.

关键词： CO_(2)hydrogenation Olefins CO_(2)-FTS Iron-based catalysts

Polarization Study of Swift J151857.0–572147 with IXPE Observation

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Research in Astronomy and Astrophysics 2024年第9期24卷 62-67页

作者： Yu-shan ling Fei Xie Ming-Yu Ge Fabio La Monaca Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and Technology Guangxi University Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences INAF Istituto di Astrofisica e Planetologia Spaziali Dipartimento di Fisica Università degli Studi di Roma “Tor Vergata” Dipartimento di Fisica Università degli Studi di Roma “La Sapienza”

We present an analysis of the Imaging X-ray Polarimetry Explorer observation from a newly discovered transient source: Swift J151857.0–572147. The obtained polarization degree(PD) and angle are 0.3% ± 0.3% and-24° ± 26° respectively in 2–8 keV within 68% confidence level errors, and polarization results are below MDP99in all energy bins, with the upper limit on PD of 0.8% in the 2–8 keV energy range. No quasi-periodic oscillations(QPOs) are detected in this observation. The polarization and QPO analyses support the hypothesis that the source was in the high soft state, and the results are consistent with predictions for a thin accretion disk model.

关键词： stars: black holes polarization X-rays: bursts X-RAY-POLARIZATION THIN ACCRETION DISK BLACK-HOLE MODEL

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以水为媒:河西走廊上移民村庄的生成与变动

河西学院学报 2024年第1期40卷 29-35页

作者：张凌山中共新疆维吾尔自治区委员会党校新疆乌鲁木齐830000

水在河西走廊乡村社会发展中居于中心地位,以东台村地下水利用实践及其变动过程进行历时性观照,围绕开井建村、关井压田和经济作物种植三个时期的水资源利用实践,呈现出国家、村落、市场和村民多主体间的互动过程,经济理性、村落共同体... 详细信息

水在河西走廊乡村社会发展中居于中心地位,以东台村地下水利用实践及其变动过程进行历时性观照,围绕开井建村、关井压田和经济作物种植三个时期的水资源利用实践,呈现出国家、村落、市场和村民多主体间的互动过程,经济理性、村落共同体与国家意志在社会变迁中复杂交织,构建出协商、矛盾、调整的脆弱动态平衡,并且随着时间节点推移和彼此关系强弱不断变化。这一变动过程关联到移民生计、商品农业、乡村治理和生态保护等乡村发展主题,为理解河西走廊乡村振兴和社会发展等宏大叙事提供田野经验。

关键词：河西走廊水利制度村落发展多主体历时性

新质生产力发展对制造业出口技术复杂度的影响

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价格月刊 2024年第9期 70-80页

作者：黄正松单凌涛徐政贵州财经大学贵州贵阳550025 中共江苏省委党校江苏南京210009

新质生产力为提升中国制造业附加值和竞争力提供了重要机遇与动力,其中对出口技术复杂度的影响对中国制造业发展具有重要意义。基于2012—2021年中国30个省份的面板数据,通过中介效应检验深入探究了中国新质生产力发展对制造业出口技术... 详细信息

新质生产力为提升中国制造业附加值和竞争力提供了重要机遇与动力,其中对出口技术复杂度的影响对中国制造业发展具有重要意义。基于2012—2021年中国30个省份的面板数据,通过中介效应检验深入探究了中国新质生产力发展对制造业出口技术复杂度的影响。结果表明,新质生产力发展对制造业出口技术复杂度具有正向影响,新质生产力发展水平越高,制造业出口技术复杂度水平就越高,这种正向作用在东部、中部地区及高收入经济水平地区尤为显著;优化产业结构、提高贸易竞争力在新质生产力发展对制造业出口技术复杂度的影响过程中存在中介效应。中国应善用新质生产力发展对制造业出口技术复杂度的正向影响,通过优化产业结构和提高国际贸易竞争力来不断提升制造业出口技术复杂度。

关键词：新质生产力出口技术复杂度产业结构贸易竞争

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智慧供应链建设能否促进企业分工——基于供应链创新与应用试点政策

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中国地质大学学报（社会科学版） 2024年第4期24卷 101-115页

作者：冯银严飞石大千樊令珊湖北经济学院低碳经济学院湖北武汉430205 武汉理工大学经济学院湖北武汉430070

为探索智慧供应链建设在提高企业内部分工效率,畅通国际国内双循环的作用,本文基于供应链敏捷性和供应链协同理论,将2018年供应链创新与应用试点作为智慧供应链建设的准自然实验。基于上市公司2013—2020年数据,研究了智慧供应链建设对... 详细信息

为探索智慧供应链建设在提高企业内部分工效率,畅通国际国内双循环的作用,本文基于供应链敏捷性和供应链协同理论,将2018年供应链创新与应用试点作为智慧供应链建设的准自然实验。基于上市公司2013—2020年数据,研究了智慧供应链建设对企业内部分工的影响及其作用机制。主要研究结论如下:(1)实证分析表明,智慧供应链建设对企业内部分工有显著提升作用,经过一系列稳健性检验后结论依然成立;(2)机制分析表明,智慧供应链建设通过交易成本机制、关系效应机制和融资机制三大效应提升了企业内部分工水平,上述机制均通过了实证检验;(3)异质性检验结果表明,由企业所有制、企业生命周期、产业异质性、要素密集度、要素市场分割程度、企业数字化水平和地区异质性这七个方面划分出的不同类型的企业受到智慧供应链带来的分工效应存在差异。据此,本文为推进智慧供应链建设进而推动企业内部分工,提升国家竞争力提供了微观层面的理论支撑与经验证据。

关键词：智慧供应链分工供应链敏捷性供应链协同

DFT Study on Two C_4N_(12)O_4 Isomers with Pagodane- and Isopagodane-like Structures

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Chinese Journal of Structural Chemistry 2005年第11期24卷 1264-1270页

作者： LIU Feng-ling WANG Jin-shan PENG ling Department of Chemistry Shandong Normal University Jinan 250014 China

Geometries, energies, and vibrational frequencies for two C4N12O4 isomers with pagodane- and isopagodane-like structures have been calculated at the B3LYP/6-31G＊ *** 1 and 2 are of D2h and D2d symmetry, respectively. Heats of formation for the two C4N12O4 isomers have been estimated in this paper, indicating they would be reasonable candidates for high energy density materials.

关键词： two C4N12O4 isomers with pagodane-like structures high energy density material,B3LYP/6-31G* vibrational frequency heat of formation

基于RAMP范式的中学化学实验风险认知教育模式构建与应用

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化学教育（中英文） 2024年第13期45卷 78-84页

作者：凌珊陈新丽周合兵刘聪华南师范大学化学学院广东广州510006

通过对RAMP范式具体内容的分析和思考设置5个关键问题,并以5个关键问题为引导,设计中学化学实验风险评估模板。根据RAMP范式具体内容划分建立学生风险认知能力评价标准和等级评定,基于RAMP范式构建中学化学实验风险认知教育模式,并以氯... 详细信息

通过对RAMP范式具体内容的分析和思考设置5个关键问题,并以5个关键问题为引导,设计中学化学实验风险评估模板。根据RAMP范式具体内容划分建立学生风险认知能力评价标准和等级评定,基于RAMP范式构建中学化学实验风险认知教育模式,并以氯水的成分探究实验为例阐述该模式的应用,为中学生化学风险认知与决策能力培养提供参考。

关键词： RAMP 化学实验风险认知实验模式能力评价

Mechanism of magnetic field-modulated luminescence from lanthanide ions in inorganic crystal:a review

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Rare Metals 2020年第10期39卷 1113-1126页

作者： shan-ling Zuo Ping Chen Cao-Feng Pan Guangxi Key Laboratory for Relativistic Astrophysics Center On Nanoenergy ResearchSchool of Physical Science and TechnologyGuangxi UniversityNanning 530004China Beijing Institute of Nanoenergy and Nanosystems National Center for Nanoscience and TechnologyChinese Academy of SciencesBeijing 100083China

The luminescence from lanthanide ions has potential applications in light emitting diodes,biomedical,solar cells,sensors,display,***,the luminescence is suffered from the various problems,such as low luminescence efficiency and inharmonious wavelength for energy *** field is an efficient method to modulate the wavelength and intensity of luminescence from lanthanide *** field redistributes the populated electrons in the excited states to tune the wavelength of lanthanide ions by Zeeman effect,mixing effect,and quantum confinement *** field enhances or suppresses the luminescence intensity by the administration of cross-relaxation,energy transfer,and Boltzmann *** this review,we first introduce the various phenomena and mechanisms of magnetic field modulated downshift luminescence from lanthanide ions,including Zeeman effect,cross-relaxation,crystal structure,absorption,quantum confinement effect,and magneticoptical ***,we explain the regulation of upconversion luminescence by magnetic field,containing energy transfer and mixing ***,different options regarding how to understand the mechanism of magnetic field-modulated luminescence from lanthanide ions in the future are outlined.

关键词： Magnetic field Lanthanide ions Luminescence Microscopic mechanism

Prediction of Velocity and Deformation Fields During Multipass Plate Hot Rolling by Novel Mixed Analytical-Numerical Method

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Journal of Iron and Steel Research International 2011年第7期18卷 20-27页

作者： ZHANG Jin-ling CUI Zhen-shan National Die and Mold CAD Engineering Research Center Shanghai Jiao Tong University Shanghai 200030 China

An integrated mathematical model is proposed to predict the velocity field and strain distribution during multi-pass plate hot rolling. This model is a part of the mixed analytical-numerical method （ANM） aiming at predic- tion of deformation variables, temperature and microstructure evolution for plate hot rolling. First a velocity field with undetermined coefficients is developed according to the principle of volume constancy and characteristics of metal flow during rolling, and then it is solved by minimizing the total energy consumption rate. Meanwhile a thermal model coupling with the plastic deformation is exploited through series function solution to determine temperature distribution and calculate the flow stress. After that, strain rate field is calculated through geometric equations and strain field is derived by means of difference method. This model is employed in simulation of an industrial seven pass plate hot rolling process. The velocity field result and strain field result are in good agreement with that from FEM simulation. Furthermore, the rolling force and temperature agree well with the measured ones. The compari- sons verify the validity of the presented method. The calculation of temperature, strain and strain rate are helpful in predicting microstructure. Above all, the greatest advantage of the presented method is the high efficiency, it only takes 12 s to simulate a seven-pass schedule, so it is more efficient than other numerical methods such as FEM.

关键词： multi-pass plate rolling analytical-numerical method (ANM) velocity field strain field strain rate