检索结果-内蒙古大学图书馆

Photocatalytic degradation of waste liquid from biomass gasification in supercritical water with simultaneous hydrogen production over CdS sensitized Na2Ti2O4(OH)2

引用

Nanostructured Materials and Nanotechnology V - 36th International Conference on Advanced Ceramics and Composites, ICACC 2012

作者： Tang, Wendong Jing, Dengwei Guo, Simao Yin, Jiarong Guo, Liejin State Key Laboratory of Multiphase Flow in Power Engineering Xi'An Jiaotong University Xi'an ShaanXi 710049 China

ISBN: (纸本)9781118205976

Photocatalytic water splitting by solar light and biomass gasification in supercritical water both are considered as the most promising routes for renewable hydrogen production. The waste liquid from biomass gasification in supercritical water contains various organic compounds which can act as electron donors in photocatalytic system. In the present work, we report the hydrogen production by the anaerobic photocatalytic reforming of waste liquid from biomass gasification in supercritical water over CdS sensitized Na 2Ti2O4 (OH)2 nanotubes, Various reaction parameters were investigated, such as different gasification temperature and the pH value of the reaction solution. It was demonstrated that gasification in supercritical water and photocatalytic water splitting can be coupled together.

关键词： Cadmium sulfide

来源：评论

学校读者我要写书评

暂无评论

Numerical study on a novel SOFC with bi-layer interconnector

Numerical study on a novel SOFC with bi-layer interconnector

引用

2009 US-EU-China Thermophysics Conference - Renewable Energy, UECTC'09

作者： Chen, Qiuyang Zhang, Jian Wang, Qiuwang Zeng, Min State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an Shaanxi 710049 China

ISBN: (纸本)9780791802908

Solid oxide fuel cells (SOFCs) have received considerable interest nowadays, because they promise greater electrical efficiency than that obtained by a conventional heat engine or other types of low temperature fuel cells. Validated mathematical models provide a very powerful tool for the development of improved SOFC designs and operating conditions. From some literature and numerical simulation results, it could be found that the concentration gradient of fuel and oxidant gas is great on the plane which is normal to the SOFC tri-layer, especially in the porous electrode. But the structures in the previous literature and inventions are always focusing on the disturbance of flow on the plane which is parallel to the SOFC tri-layer. In order to lower the concentration polarization of SOFC, We have invented a novel SOFC with bi-layerer interconnector which can disturb the fuel and air gas on the plane which is normal to the SOFC tri-layer and enhance the mass transfer effectively. In this paper, the primary objective is to compare the concentration overpotentials under the different interconnects modes. A 2D half-cell model has been developed to study on concentration overpotentials of fuel side of the SOFC stack with conventional interconnects and novel bi-layer *** numerical simulation results show that the novel interconnect can disturb the fuel and air gas on the plane which is normal to the SOFC tri-layer and reduce the concentration overpotential of SOFC. It can enhance the mass transfer in porous electrode and improve the performance of SOFC. Copyright © 2009 by ASME.

关键词： Mass transfer

来源：评论

学校读者我要写书评

暂无评论

Experimental and kinetic study of auto-ignition in diluted methane-hydrogen fuel blends at elevated pressures

Experimental and kinetic study of auto-ignition in diluted m...

引用

9th Asia-Pacific Conference on Combustion, ASPACC 2013

作者： Zhang, Yingjia Jiang, Xue Zhang, Jiaxiang Wei, Liangjie Man, Xingjia Huang, Zuohua State Key Laboratory of Multiphase Flow in Power Engineering Xianning West Road Xi'an Shaanxi 710049 China

Ignition delay times were obtained behind the reflected shock waves for the diluted stoichiometric methane/hydrogen blends with hydrogen fractions of 20%, 60%, and 80%. Test temperatures from 980 K to 1820 K and pressures from 0.5 to 2.0 MPa. Results show that increase in hydrogen fraction significantly promotes the ignition of fuel blends due to high activity of hydrogen. Pressure-dependence of auto-ignition for methane/hydrogen was observed in three ignition regimes (methane chemistry dominating ignition, combined chemistry of methane and hydrogen dominating ignition and hydrogen chemistry dominating ignition). An explanation of the interaction between chemistries of methane and hydrogen were given by fuel flux analysis using NUIG Mech C5-49.

关键词： Hydrogen

来源：评论

学校读者我要写书评

暂无评论

An Experimental Study on the flow Characteristics of OilWater Two-Phase flow in Horizontal Straight Pipes

引用

Chinese Journal of Chemical engineering 2003年第5期11卷 491-496页

作者：刘文红郭烈锦吴铁军张西民 State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China

The flow patterns and their transitions of oil-water two-phase flow in horizontal pipes were studied. The experiments were conducted in two kinds of horizontal tubes, made of plexiglas pipe and stainless steel pipe with 40 mm ID respectively. No. 46 mechanical oil and tap water were used as working fluids. The superflcial velocity ranges of oil and water were: 0.04-1.2m·s-1 and 0.04-2.2m·s-1, respectively. The flow patterns were identified by visualization and by transient fluctuation signals of differential pressure drop. The flow patterns were defined according to the relative distribution of oil and water phases in the pipes. flow pattern maps were obtained for both pipelines. In addition, semi-theoretical transition criteria for the flow patterns were proposed, and the proposed transitional criteria are in reasonable agreement with available data in liquid-liquid systems.

关键词： oil-water two-phase flow horizontal pipe flow pattern transition criterion

来源：评论

学校读者我要写书评

暂无评论

WS2 sensitized mesoporous TiO2 for efficient photocatalytic hydrogen production from water under visible light

WS2 sensitized mesoporous TiO2 for efficient photocatalytic ...

引用

16th World Hydrogen Energy Conference 2006, WHEC 2006

作者： Jing, Dengwei Guo, Lie-Jin Xing, Chanjuan Yan, Qiuhui State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an Shaanxi 710049 China

ISBN: (纸本)9781622765409

Nanosize WS2 sensitized mesoporous TiO2 was prepared to extend the adsorption of the wide band gap TiO2 into visible light region. Compared with nonporous particle TiO2 substrate, it was found that the existence of mesopore is important for larger amount of WS 2 loading and inhibition of the light-induced detachment of WS 2 particles from the TiO2 substrate during photocatalytic reaction, which leads to higher photocatalytic activity and stability. We also found that the rate-determining step for photocatalytic hydrogen production is the transfer of electrons from TiO2 substrate to H+ in solution, when the recombination between electrons and holes within TiO 2 could be neglected. In this case, deposition of Pt at the surface of semiconductor is indispensable for efficient hydrogen production.

关键词： Titanium dioxide

来源：评论

学校读者我要写书评

暂无评论

Photocatalytic reforming of formic acid with simultaneous hydrogen production under visible light over CdS sensitized Na2Ti 2O4(OH)2

Photocatalytic reforming of formic acid with simultaneous hy...

引用

2011 MRS Spring Meeting

作者： Tang, Wendong Jing, Dengwei Guo, Liejin State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an Shaanxi 710049 China

ISBN: (纸本)9781618395238

The present work reports the renewable hydrogen production by an anaerobic photocatalytic reforming of formic acid over CdS sensitized Na 2Ti2O4(OH)2 nanotubes, the Na 2Ti2O4(OH)2 nanotube was prepared and charactered by X-ray diffraction, UV-visible absorption, transmission electron microscopy, etc. The activity of the catalyst in formic acid was investigated. The greatest photocatalytic reforming activity of formic acid occurs as the formic acid initial concentration is 20 v.%. A probable mechanism for the photocatalytic reforming process was proposed and discussed. © 2011 Materials Research Society.

关键词： Cadmium sulfide

来源：评论

学校读者我要写书评

暂无评论

Experimental Investigation on Ejector Performance Using R134a as Refrigerant

引用

Journal of Thermal Science 2019年第4期28卷 727-735页

作者： DAI Zhengshu YU Bo LIU Pengpeng CHEN Guangming ZHANG Hua School of Energy and Power Engineering University of Shanghai for Science and TechnologyShanghai 200093China State Key Laboratory of Air-conditioning Equipment and System Energy Conservation Zhuhai 519070China Institute of Refrigeration and Cryogenics Zhejiang UniversityHangzhou 310027China Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering Shanghai 200093China

Ejector refrigeration has the advantage of low capital cost,simple design,reliable operation,long lifespan and almost no *** only weakness is the low efficiency and its intolerance to deviations from design operation condition.R134 a used in ejector refrigeration system gives better performance in comparison with many other environmental friendly refrigerants as the generation temperature is from 75℃to 80℃.The present work experimentally investigated the on-design and off-design performance of the ejector with fixed geometry using R134 a as refrigerant,and cycle performance of the ejector refrigeration *** experimental prototype was constructed and the effects of primary flow inlet pressure,secondary flow inlet pressure and ejector back pressure on ejector performance and cycle performance were investigated *** operation conditions are:primary flow inlet pressure from 2.2 MPa to 3.25 MPa,secondary flow inlet pressure from 0.36 MPa to 0.51 MPa,ejector back pressure from 0.45 MPa to 0.67 *** were drawn from the experimental results,and the experimental data can be used for validation of theoretical model for both critical and subcritical mode.

关键词： ejector performance refrigeration R134a experiment

来源：评论

学校读者我要写书评

暂无评论

Simulation study on boiler thermal system of a 600MW supercritical lignite-fired power plant based on GSE

Simulation study on boiler thermal system of a 600MW supercr...

引用

International Conference on power engineering 2013, ICOPE 2013

作者： Han, Xiaoqu Ma, Huajie Xue, Zhaonan Yan, Junjie Chong, Daotong Wang, Jinshi State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jia Otong University Xi'an710049 China

In this paper, the boiler thermal system of a 600MW supercritical lignite-fired power plant was modeled and simulated with the application of GSE simulation software. The model was developed in Jtopmeret according to the structural features and divided into steam-water system, flue gas -air system, and direct-fired pulverizing system. Model simulations were implemented in SimExec. The outlet temperature of different devices and sections under BMCR and 75% THA conditions were compared with the reference data. The results show that the simulation model developed had high accuracy and reliability. Further simulations were carried out on the varied load. The boiler efficiency and flue gas extraction amount changed with the load.

关键词： Flue gases

来源：评论

学校读者我要写书评

暂无评论

Reversible V4+/V5+ Redox in Na4vfe(Po4)3 Cathode for High-power Sodium-Ion Batteries

SSRN

引用

SSRN 2025年

作者： Xie, Peng-Xing Zhao, Qing-Yuan Dong, Haojie Long, Tao Ding, Meng-Sha Xie, Bin Wang, Xiaofeng Ling, Wei Liu, Mengting Wu, Xiongwei Wang, Peng-Fei Zeng, Xianxiang School of Chemistry and Materials Science Hunan Agricultural University Changsha410128 China Center of Nanomaterials for Renewable Energy State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical Engineering Xi'an Jiaotong University Shaanxi Xi’an710049 China Key Laboratory of Physics and Technology for Advanced Batteries Ministry of Education College of Physics Electron Microscopy Center Jilin University Changchun130012 China Hunan Engineering Technology Research Center of Vanadium Flow Battery and Energy Storage System Hunan Changsha410036 China College of Chemistry and Chemical Engineering Hunan Normal University Hunan Changsha410081 China

Delivery of high energy density in polyanion compound-Na3V2(PO4)3 based on three-electron redox is still challenging because of their controversial multi-electron reaction mechanism and unsatisfactory electrochemical reversibility. Herein, the reversible V4+/V5+ redox (ca. 4.0 V) could be successfully activated in Na4VFe(PO4)3 cathode material through a Na-rich strategy, demonstrating a reversible specific capacity of 154.7 mAh g−1 at 0.1 C and 90.3 mAh g−1 after 800 cycles at 20 C, with 80% of the initial capacity retained. The entire electrochemical reaction undergoes a highly recoverable phase transition by in-situ X-ray diffraction. Impressively, the Na-rich strategy could not only allow Na2 site to be occupied to activate the V4+/V5+ redox pair confirmed by X-ray absorption near-edge structure spectroscopy, but also enable Na+ transportation across the generated vacancies rather than synergistic Na+ diffusion. Therefore, Na4VFe(PO4)3||hard carbon full batteries deliver a high specific capacity of 104.5 mAh g−1 and 90 mAh g−1 at 0.2 C and 5 C, respectively. This work provides rational design strategy of multi-electron transfer reaction in high-energy sodium-ion batteries. © 2025, The Authors. All rights reserved.

关键词： Sodium-ion batteries

来源：评论

学校读者我要写书评

暂无评论

Performance of a domestic refrigerator using R600a/nano-TiO2 as working fluid

Performance of a domestic refrigerator using R600a/nano-TiO2...

引用

4th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2009

作者： Bi, Shengshan Guo, Kai Liu, Zhigang Wu, Jiangtao State Key Laboratory of Multiphase Flow in Power Engineering Xi'An Jiaotong University Xi'an Shaanxi 710049 China

ISBN: (纸本)9868509610

In this work, an experimental work was investigated on the nano-refrigerant. A domestic R600a refrigerator was selected and instrumented with 19 resistance thermometers and three pressure transducers. R600a/TiO 2 nano-refrigerants were used as working fluid without any system reconstruction. The refrigerator performance was then investigated using energy consumption test and freeze capacity test. The results indicate that R600a/TiO2 nano-refrigerant works normally and safely in the refrigerator. The refrigerator performance was better than the pure R600a system, with 9.6% less energy used with 0.5 g/L nano-refrigerant. Thus, using R600a/ TiO2 nano-refrigerant in domestic refrigerators is feasible.

关键词： Refrigerators

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：