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Theoretical energy consumption analytical method for metal separation process

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Journal of thermal science 2010年第4期19卷 377-382页

作者： dehong xia,Yingchun SHANG,{2. ren and Yifan LI department of thermal engineering,university of science and Technology beijing,beijing 100083 department of thermal {2. University of Science and Technology Beijing Beijing China

The theoretical energy consumption(TEC)analytical methods and the calculated models for the electrolytic and thermal reduction metal separation processes have been put forward based on thermodynamics and physical chemistry principles,providing theoretical foundation for choosing the optimum metal separation *** on the models,the TECs of the Mg separation processes are taken as an example,and have been calculated and analyzed contrastively,including the MgCl_2.electrolytic method,the MgO electrolytic method with inert electrode and with carbon anode,and the silicothermic *** is shown that the thermal method is more reasonable than the electrolytic methods to separate Mg under low efficiency of coal power generation.

关键词： metal separation theoretical energy consumption electrolysis thermal reduction

Study of the Reconstruction of Fractal Structure of Closed-cell Aluminum Foam and its thermal Conductivity

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Journal of thermal science 2012年第1期21卷 77-81页

作者： dehong xia {2. guo ling ren department of thermal {2. University of Science and Technology Beijing Beijing 100083 China

Based on the characteristics of the internal structure of closed-cell aluminum foam, this paper attempts to illus- trate the process of reconstructing the internal structures of closed-cell aluminum foam in Monte-Carlo method and the fractal characteristics of the reconstructed model. Furthermore, Binary Array Method is proposed by analyzing the reconstructed model and the thermal conductivity model of closed-cell aluminum foam is established. At the same time, the thermal conductivity of the foam materials with diffe{2.t porosity is calculated by Binary Array Method, and the calculated value coincides with the experimental results in the refe{2.ce, which proves the correctness of these methods.

关键词： fractal closed-cell aluminum foam reconstruction Binary Array Method thermal conductivity

A Comparative Study on the Separating Methods of Al,Ca and Mg Based on Theoretical Energy Consumption

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Journal of thermal science 2011年第1期20卷 82-87页

作者： dehong xia Yingchun SHANG {2. ren department of thermal {2. University of Science and Technology Beijing Beijing 100083

Based on thermodynamics and physical chemistry theory,the theoretical energy consumption (TEC) of the typical separating processes of Al,Ca and Mg has been calculated and *** paper attempts to prove that the thermal method is more reasonable than the electrolytic methods to separate Al,Ca and Mg under the domestic circumstances of the low efficiency of coal-firing power plant at present.

关键词： Aluminum Calcium Magnesium Theoretical energy consumption

Continuous Method Development and Numerical Study of HHV Water Gas Production by Pulverized Coal

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Journal of thermal science 2011年第5期20卷 474-480页

作者： ren ling {2. Zhang Yan department of thermal {2. and Energy engineering School of Mechanical Engineering University of Science andTechnology Beijing China

In energy industries, it is always of difficulty to produce high heat value（HHV） gas continuously using pulverized coal. In this paper, a new type furnace for partitioned alternative gasification using pulverized coal is developed, in which the oxidation and reduction reaction occur alternatively with the dropping of pulverized coal and finally HHV gas could be continuously obtained at the reduction zone exit and low heat value（LHV） gas at the oxidation zone exit. Furthermore, the gasification characteristics and their factors in furnace are numerically simulated under two dimensional model with a self-coded program, based on heat, mass and energy transfer as well as reaction principles. It is found that the producing rate of HHV gas is 1.10Nm3/kg with heat value of ll.72.J/Nm3, how- ever, that of LHV gas is 2.58Nm3/kg with heat value of 5.30MJ/Nm3, and the coal gas efficiency is 81.16% under optimized conditions.

关键词： pulverized coal gasification continuous method high heat value water gas

兼具小气载吸附、快速换样和全面温控的程序升温脱附谱装置

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Chinese Journal of Chemical Physics 2023年第4期36卷 373-383,I0034页

作者：夏树才董珊珊谢慧智李甲龙王天骏张未卿车丽任泽峰戴东旭杨学明周传耀中国科学院大连化学物理研究所分子反应动力学国家重点实验室大连116023 中国科学技术大学化学与材料科学学院化学物理系合肥230026 大连海事大学理学院物理系大连116026 中国科学院大学北京100049

程序升温脱附谱技术能定量识别表面物种和测量脱附动力学,因此被广泛应用于多相催化和表面科学研究.对于高效率和高质量的程序升温脱附谱实验而言,减小吸附过程中的气载并在不破坏超高真空条件下完成样品更换以及实现对样品全方位的温... 详细信息

程序升温脱附谱技术能定量识别表面物种和测量脱附动力学,因此被广泛应用于多相催化和表面科学研究.对于高效率和高质量的程序升温脱附谱实验而言,减小吸附过程中的气载并在不破坏超高真空条件下完成样品更换以及实现对样品全方位的温度控制是至关重要的.然而,现有的表面科学程序升温脱附谱装置通常无法同时满足这些条件。鉴于此,本文搭建了一台可实现小气载进样、快速换样以及全面温控的程序升温脱附谱装置。使用自动控制的基于微毛细管阵列的溢流分子束给样器,制备分子吸附的表面,让气体的进样更加精准并大幅减小了气载。借助液氮传输线并优化样品台处的热接触和热偶连接方式,使得这台程序升温脱附谱装置同时具备了快速换样、精准测温、快速降温以及稳定线性升温等功能。通过测量水从高定向热解石墨和TiO_(2.(110)表面的脱附特征以及甲氧基阴离子在TiO_(2.(110)表面的光催化氧化反应,证实了该程序升温脱附谱装置在测量脱附动力学参数、定量识别表面吸附物种和吸附位点以及分析表面光化学反应等方面的性能,本工作将为研究人员设计高效率和高质量的程序升温脱附谱装置提供宝贵的经验和思路。

关键词：程序升温脱附谱气体进样快速换样表面化学反应