检索结果-内蒙古大学图书馆

Rationally Engineered Reox-Cuso4/Tio2 Catalyst with Superior Nh3-Sco Efficiency and Remarkably Boosted So2 Tolerance: Synergy of Acid Sites and Surface Adsorbed Oxygen

SSRN

引用

SSRN 2022年

作者： Yu, Yanke Wei, Desheng Tong, Zhaojian Wang, Jinxiu Chen, Jinsheng He, Chi Department of Environmental Science and Engineering School of Energy and Power Engineering Xi’an Jiaotong University Xi’an710049 China Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences Xiamen361021 China State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Shaanxi Xi'An710049 China National Engineering Laboratory for VOCs Pollution Control Material & Technology University of Chinese Academy of Sciences Beijing101408 China

Ammonia (NH3) is a critical component causing environmental problems like haze and water pollution. Selective catalytic oxidation of ammonia (NH3-SCO) to N2 and H2O is a promising method to abate NH3 emission. However, inferior SO2 tolerance is still a tremendous challenge to be conquered for present NH3-SCO catalysts regarding practical applications. Application of materials which was difficult to be sulfated by SO2 should be an effective pathway to solve this problem. Here, a ReOx-CuSO4/TiO2 catalyst which coupled the advantages of ReOx (Rhenium oxides, supplying highly active adsorbed surface oxygen for enhancing NH3-SCO reaction) and CuSO4 (providing Brønsted acid sites for inhibiting the formation of N2O) was rationally fabricated. Results indicated that ReOx-CuSO4/TiO2 catalyst performed excellent catalytic performance in NH3-SCO with almost 100% of NH3 oxidized at 300 °C (N2 selectivity as high as 96%). Crucially, the composite catalyst exhibited incredible activity and stability under harsh reaction conditions toward SO2 (600 ppm) and H2O (4.0 vol.%) owing to the superior inhibition capability for SO2 adsorption. In situ DRIFTS, in situ Raman and in situ XPS demonstrated that the NH3-SCO reaction over ReOx-CuSO4/TiO2 catalyst mainly obeyed a N2H4 reaction mechanism and oxidation-reduction circle between Re7+ and Re6+ played a vital role. In addition, SO2 would not affect this reaction mechanism on ReOx-CuSO4/TiO2 catalyst. The knowledge and understanding reported could provide critical insights for the design and optimization of efficient materials for industrial NH3 oxidative elimination. © 2022, The Authors. All rights reserved.

关键词： Ammonia

来源：评论

学校读者我要写书评

暂无评论

Experimental study on safe operation state of W-shaped flame boiler 7

Experimental study on safe operation state of W-shaped flame...

引用

7th International Conference on power engineering, ICOPE 2019

作者： Wen, Du Yao, Yashu Li, Lian Zhou, Qulan Li, Na Deguchi, Yoshihiro State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an710049 China Graduate School of Advanced Technology and Science Tokushima University Tokushima770-8501 Japan

To get more acknowledges about W-shaped flame boiler, scaled down experiment system was set up to collect the basic data about temperature, strain, stress, shear and heat flux distribution of W-shaped flame boiler. The results showed that temperature distribution is mainly decided by the distance of the flame. Area which is washed against by flame shows high temperature. The temperature on the front wall is higher than rear wall, especially on the connection zone between furnace chamber and upper ash hopper. Heat flux distribution is dominated by both radiation and convective heat transfer. High heat flux zone is surrounding the burners and it is decided by temperature in furnace chamber. Medium heat flux zone is along the route of the gas fume and it is decided by gas fume's convective heat transfer. Strain distribution is well matched with temperature distribution especially in high strain zone. And the magnitude of stress depends on temperature gap, but the direction depends on both temperature gap and external constraints. In this experiment, we find that front wall is more vulnerable than other walls especially on the connection zone between furnace chamber and upper ash hopper. It is of high value on boiler safety operating and on optimization of the furnace chamber's structure. © ICOPE 2019 - 7th International Conference on power engineering, Proceedings. All rights reserved.

关键词： Temperature distribution

来源：评论

学校读者我要写书评

暂无评论

Thermodynamic and Thermo-economic analysis of a Carnot battery coupled with LNG cold energy power generation

引用

Journal of Energy Storage 2025年 129卷

作者： Shiyu Liu Rui Ye Manzheng Zhang Zheng Miao China Electric Power Planning and Engineering Institute (EPPEI) 100120 Beijing China The Beijing Key Laboratory of Multiphase Flow and Heat Transfer North China Electric Power University 102206 Beijing China

The thermodynamic and thermo-economic analyses are carried out in the present work for a low-temperature Carnot battery (CB) system, which integrates LNG cold energy and power generation with the organic Rankine cycle (ORC). The influence of operating parameters on system performance was discussed and analyzed. The exergy efficiency in combination with power-to-power (P2P) efficiency and energy storage density is optimized through multi-objective optimization. Although the total cost of the LNG-CB is much higher than the basic CB, the dramatic increase in the power output of the LNG-CB provides a significant superiority in both the thermodynamic and thermo-economic performance. The P2P efficiency of the LNG-CB is 2.3–4.5 times higher than the basic CB, while the levelized energy cost ( LEC ) of the LNG-CB is lower than half. The higher LNG pressure, higher component isentropic efficiency, lower pinch point temperature difference (PPTD), lower heat storage temperature, and higher heat storage temperature difference are preferable to improve the system performance. The LNG-CB achieves the maximum P2P efficiency of 258.91 %, the maximum exergy efficiency of 39.44 %, and the minimum LEC of 0.019 $/kWh at the PPTD of 5 °C, the heat storage temperature difference of 70 °C, and the isentropic efficiencies of 94 and 92 for the expander and compressor. The distributions of the Pareto front under different LNG pressures are similar, with the system performing best at the LNG pressure of 7 MPa.

关键词： Cryogenic energy storage

来源：评论

学校读者我要写书评

暂无评论

Light-Enhanced Thermochemical Production of Solar Fuels from Methane Via Nickel-Based Redox Cycle

SSRN

引用

SSRN 2022年

作者： Liu, Mingkai Zhang, Jinrui Yang, Tianlong Rao, Qiong Gai, Zhongrui Zhao, Jianxiong Pan, Ying Su, Dong Jin, Hongguang Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing100190 China University of Chinese Academy of Sciences Beijing100049 China International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University 710049 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China

Thermochemical methane reforming driven by solar energy is one of the efficient ways to store the renewable energy and to simultaneously reduce greenhouse gas emission. We report reaction reactivity of steam reforming of methane using nickel-based oxygen carrier driven by pure thermal heating and direct light irradiation in the same reactor. We find that the light-driven steam methane reforming system show improved conversion and reaction rate compared to that driven by pure thermal heating. We observed that illuminated NiO/NiAl2O4 achieved the same methane conversion rates and the H2 production rate comparable to those obtained on the same samples operated with only a thermal energy input, but at temperatures up to ~50 K lower. Based on in situ diffuse reflectance Infrared Fourier transform spectroscopy (DRIFTs) experiments, we postulate that light on the nickel oxide surface act to activate CH4 desorption and facilitate CHxO species evolution. By the combined effects of selection of chemical looping reactions and operation conditions, the solar-to-fuel efficiency of 16% was achieved. The results showcase the design of more energy-efficient chemical processes with a significant fraction of energy input provided in the form of direct sunlight irradiation as a potent pathway that can complement extremely high-temperature thermochemistry efforts in the quest for more efficient solar fuel production. © 2022, The Authors. All rights reserved.

关键词： Fourier transform infrared spectroscopy

来源：评论

学校读者我要写书评

暂无评论

Realization of Multilocal Gradient-Doping Pcn by Alkali Metal Ion Sustained Release Capsules for Enhanced Photocatalytic Water Splitting

SSRN

引用

SSRN 2023年

作者： Yan, Jiawei Fang, Fenjian Wei, Zhidong Chi, Jiasheng Chen, Mingxia Jiang, Zhi Jiang, Kun Shen, Shaohua Shangguan, Wenfeng Research Center for Combustion and Environment Technology Shanghai Jiao Tong University Shanghai200240 China College of Smart Energy Shanghai Jiao Tong University Shanghai200240 China College of Electrical Energy and Power Engineering Institute of Fuel Cells Shanghai Jiao Tong University Shanghai200240 China International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi’an710049 China

The gradient-doping technique has been widely applied to induce an oriented built-in electric-field. However, it is still not efficient enough for charge mobility especially for particulate semiconductors, as the field is primarily in one direction from inner to surface. Here, we propose a multilocal gradient-doping technique that a nano-capsule is designed to store dopants and then release them into semiconductors nonuniformly. As an illustration, scattered pyrochlore-type K2Ta2O6 nanoparticles have been validated the capability of storing and releasing K+, which subsequently diffuse into the substrate PCN. Multi point-radiative gradient in K+ concentration, confined within the K2Ta2O6’s vicinity, will construct several 3D potential wells which can not only accelerate the carrier separation but also offer more migration channels for both photo-induced electrons and holes to the surface. Consequently, the multilocal K+ gradient-doping PCN shows the longest carriers’ lifetime and highest AQY (~21.8% at 400 nm) compared with the other uniformly doping techniques. © 2023, The Authors. All rights reserved.

关键词： Charge transfer

来源：评论

学校读者我要写书评

暂无评论

聚丙烯酸酯修饰铜电极用于电化学二氧化碳还原选择性生成多碳产物（英文）

引用

Science Bulletin 2024年第15期 2395-2404页

作者：石玉川张凯妮董崇礼 Ta Thi Thuy Nga 汪淼魏代星王佳琳王亦清沈少华 International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Department of Physics Tamkang University

Highly selective production of value-added multicarbon(C2+) products via electrochemical CO2reduction reaction（eCO2RR） on polycrystalline copper（Cu） remains ***,the facile surface modification using poly（α-ethyl cyanoacrylate）(PECA) is presented to greatly enhance the C2+selectivity for eCO2RR over polycrystalline Cu,with Faradaic efficiency（FE） towards C2+products increased from30.1% for the Cu electrode to 72.6% for the obtained Cu-PECA electrode at -1.1 V *** hydrogen electrode（RHE）.Given the well-determined FEs towards C2+products,the partial current densities for C2+production could be estimated to be-145.4 mA cm-2for the Cu-PECA electrode at -0.9 V *** in a homemade flow ***-situ spectral characterizations and theoretical calculations reveal that PECA featured with electron-accepting-C≡N and-COOR groups decorated onto the Cu electrode could inhibit the adsorption of *H intermediates and stabilize the *CO intermediates,given the redistributed interfacial electron density and the raised energy level of d-band center（Ed） of Cu active sites,thus facilitating the C-C coupling and then the C2+selective *** study is believed to be guidable to the modification of electrocatalysts and electrodes with polymers to steer the surface adsorption behaviors of reaction intermediates to realize practical eCO2RR towards value-added C2+products with high activity and selectivity.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Enhanced Hydrogen Production of Acidified La2nio4 in Water and Seawater by Coupled Piezo-Photocatalysis

SSRN

引用

SSRN 2022年

作者： Ma, Xinyu Gao, Yangfei Yang, Bian Lou, Xiaojie Huang, Jianbing Ma, Lijing Jing, Dengwei International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Xi’an710049 China Frontier Institute of Science and Technology State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong University Xi’an710049 China School of Materials Science and Engineering Xi’an University of Technology Xi’an710048 China

Photocatalytic water splitting for hydrogen production is more sustainable than traditional desalination and electrocatalysis, because of avoiding electrode corrosion and other problems. Two-dimensional perovskite oxide materials have multiple characteristics such as ferroelectric, piezoelectric and pyroelectric properties, demonstrating good light response and chemical stability, which provides a broad prospect in photo-chemical conversion. In this study, acidified La2NiO4 can greatly improve the amount of hydrogen evolution by coupling its piezocatalysis and photocatalysis. Under the full-spectrum illumination assisted with ultrasonic vibration in seawater, a recordable hydrogen production activity of 1315.44 μmol·g-1·h-1 was obtained in acidified La2NiO4 by 0.006 mol/L HCl, which more than 200 times higher than that of pure La2NiO4 (6.89 μmol·g-1·h-1) in methanol solution. It is found that the significant hydrogen production of La2NiO4 samples treated with acidification lies in the fast separation of charge carriers in comparison with those without acidification. © 2022, The Authors. All rights reserved.

关键词： Hydrogen production

来源：评论

学校读者我要写书评

暂无评论

Enhanced Hydrogen Production of Acidified Ruddlesden-Popper Type Perovskite Oxides in Water and Seawater by Coupled Piezo-Photocatalysis

SSRN

引用

SSRN 2022年

作者： Ma, Xinyu Gao, Yangfei Yang, Bian Lou, Xiaojie Huang, Jianbing Ma, Lijing Jing, Dengwei International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Xi'An710049 China Frontier Institute of Science and Technology State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong University Xi'An710049 China School of Materials Science and Engineering Xi’an University of Technology Xi’an Xi'An710048 China

关键词： Hydrogen production

来源：评论

学校读者我要写书评

暂无评论

Coupling Effect of Heat Transfer and flow Resistance in the Rifled Tube Water Wall of a Ultra-Supercritical CFB Boiler

引用

Journal of Thermal Science 2019年第5期28卷 1078-1088页

作者： LI Yaode YANG Dong OUYANG Shijie LIU Dan WANG Wenyu State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China North China Electric Power Test and Research Institute Co. Ltd Tianjing 300000 China

The coupling factor is used in this study to characterise the combined effect of the heat transfer and resistance characteristics of a rifled tube. Boundary layer theory is utilised to investigate the relationship between the comprehensive coefficient and Reynolds number in two regions, namely, higher and lower than pseudo-critical enthalpy. Results indicate that mass flux exerts a decisive negative influence on the coupling effect, and the impacts of pressure and heat flux are weak. The overall effect decreases rapidly as the mass flux increases, but it increases in the area behind the quasi-critical enthalpy. The coupling effect is also affected by specific heat ratio, thermal acceleration and buoyancy. The correlations of heat transfer and friction resistance are deduced with high precision according to experimental data.

关键词： supercritical pressure heat transfer frictional resistance coupling effect

来源：评论

学校读者我要写书评

暂无评论

Expression of SALL4 in the synovial tissue of refractory rheumatoid arthritis patients

引用

Rheumatology & Autoimmunity 2024年第1期4卷 59-61页

作者： Ru Fan Zeqiong Liang Yujie Bu Fen Zhang Xing Cen Yuqing Liu Fenping Lian Fengwu Chen Shengxiao Zhang Junwei Chen Department of Rheumatology The Second Hospital of Shanxi Medical UniversityTaiyuanChina State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong UniversityXi'anShaanxiChina Key Laboratory of Cellular Physiology at Shanxi Medical University Ministry of EducationTaiyuanChina Shanxi Provincial Key Laboratory of Rheumatism Immune Microecology The Second Hospital of Shanxi Medical UniversityTaiyuanChina

To the Editor,Rheumatoid arthritis(RA)synovitis is characterized by synovial inflammation,characterized by synovial proliferation,neovascularization,and leukocyte infiltration into the joint space,1 leading to irreversible cartilage and bone damage.2 This synovial inflammation stimulates the formation of pannus,which is an invasive tumor-like mass,ultimately contributing to the pathogenesis of *** shares several similarities with cancer,including joint pain,swelling,and stiffness,which are accompanied by hypoxia in the synovial tissue and tumor environment.3 Spalt-like transcription factor 4(SALL4)plays an essential role in the occurrence and development of tumors.4 However,SALL4 expression in synovial tissue of RA is yet to be *** study aimed to investigate SALL4 expression in synovial tissue derived from patients with RA,using immunohistochemical techniques.

关键词： SALL4 patients inflammation

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：