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Surface tension of lithium bromide aqueous solution/ammonia with additives and nano-particles

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Journal of Central South University 2015年第5期22卷 1979-1985页

作者：蔡伟华孔伟伟王悦朱蒙生王新雷 School of Energy Science and Engineering Harbin Institute of Technology Department of Agricultural and Biological Engineering University of Illinois at Urbana-Champaign School of Municipal and Environmental Engineering Harbin Institute of Technology

In order to investigate the effect of additives and nano-particle on the surface tensions of lithium bromide(Li Br) aqueous solution/ammonia, many experiments were carried out based on Wilhelmy plate method. Firstly, the surface tension of Li Br aqueous solution with 1-octanol was measured and then the comparison between the measured results and previous experimental results was given to verify the measuring accuracy. Some new additives, such as cationic surfactants cetyltrimethyl ammonium chloride(CTAC), and cetyltrimethyl ammonium bromide(CTAB) were chosen in the experiments. The experimental results show that CTAC and CTAB can obviously reduce the surface tension of Li Br aqueous solution/ammonia. In addition, it is found that nano-particles cannot remarkably decrease the surface tension of Li Br aqueous solution/ammonia. However, the mixed addition of additives and nano-particles can remarkably affect the surface tension of Li Br aqueous solution/ammonia. That is to say, additives play more important role in reducing the surface tension of Li Br aqueous solution/ammonia. But nano-particles may enhance the heat transfer in the absorption refrigeration process.

关键词： lithium bromide ammonia additives nano-particles surface tension

Studies on Systems of lithium and Potassium Halides from Salt Lake and Bittern Resources（V）──The Quaternary Reciprocal System Li￣＋■Br￣－，I￣－－H＿2O and Boundary Ternary System NH＿4Br－NH＿4I－H＿2O at 25℃

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Chemical Research in Chinese Universities 1995年第3期11卷 206-214页

作者： Tang, Zong-xun Zhang, Feng-xing Guo, Zhi-zhen Huang, Jing-ying Hao, Zhi-feng

he solubilities , refractive indexes of saturated solutions of the quaternary re-ciprocal system Li￣+ , Br￣(-) ,I￣(-)H_(2)O and its boundary ternary system NH_(4)Br-NH_(4)I-H_(2)O at 25℃ have been investigated using isothermal method. In the titleternary system which belongs to Roozeboom Ⅳ type, there are two limited solid so-lutions. Entering into the quaternary system, the region of the solid solutions re-duces and disappears with the increase of Li￣+ , and finally, the quaternary systembecomes a simple system.

关键词： Quaternary reciprocal system lithium bromide Ammonium bromide,lithium iodide Ammonium iodide.

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Chemical Research in Chinese Universities 1995年第3期

ＳｔｕｄｉｅｓｏｎＳｙｓｔｅｍｓｏｆＬｉｔｈｉｕｍａｎｄＰｏｔａｓｓｉｕｍＨａｌｉｄｅｓｆｒｏｍＳａｌｔＬａｋｅａｎｄＢｉｔｔｅｒｎＲｅｓｏｕｒｃｅｓ（Ｖ）──ＴｈｅＱｕａｔｅｒｎａｒｙＲｅｃｉｐｒｏｃａｌＳｙｓｔｅ... 详细信息

ＳｔｕｄｉｅｓｏｎＳｙｓｔｅｍｓｏｆＬｉｔｈｉｕｍａｎｄＰｏｔａｓｓｉｕｍＨａｌｉｄｅｓｆｒｏｍＳａｌｔＬａｋｅａｎｄＢｉｔｔｅｒｎＲｅｓｏｕｒｃｅｓ（Ｖ）──ＴｈｅＱｕａｔｅｒｎａｒｙＲｅｃｉｐｒｏｃａｌＳｙｓｔｅｍＬｉ￣＋，Ｂｒ￣－，Ｉ（－）－Ｈ...

关键词： Quaternary reciprocal system lithium bromide Ammonium bromide lithium iodide Ammonium iodide.

Effects of Mo Composites on the Corrosion Behaviors of Low Alloy Steel

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Journal of Wuhan University of Technology(Materials Science) 2007年第1期22卷 12-16页

作者：梁成浩 Electromechanics and Materials Engineering College Dalian Maritime University School of Chemical Engineering Dalian University of TechnologyDalian 116012China

By using electrochemical and weight loss methods, the effect of MoO42-on the corrosion behaviors of low alloy steel was investigated in the 55%LiBr＋0.07 mol/L LiOH solution at high temperature. The results show that MoO42 , being an anodic inhibitor, would form a passive film rapidly and impede both anodic and cathodic reactions. Moreover, Na2MoO4 effectively prevents corrosion in 55%LiBr＋0.07 mol/L LiOH solution when its concentration is higher than 200 mg/L. Some elements of alloy, such as chromium and nickel, may cause the widening of passive potential region and the decrease of passive density, which indicates that the corrosion resistance increases. AES analysis shows that molybdenum participates in forming a protection film. The synergistic effect between chromium and molybdenum induces Cr-steel to be in passive state in lower Na2MoO4 concentration.

关键词： lithium bromide low alloy steel inhibitor corrosion

LiBr as an Efficient Catalyst for One-pot Synthesis of Hantzsch 1,4-Dihydropyridines under Mild Conditions

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Chinese Journal of Chemistry 2011年第1期29卷 118-122页

作者： Yadav, D. K. Patel, R. Srivastava, V. P. Watal, G. Yadav, L. D. S. Alternative Therapeutics Unit Drug Development Division Medicinal Research Lab Department of Chemistry University of Allahabad Allahabad 211002 India Green Synthesis Lab Department of Chemistry University ofAllahabad Allahabad 211002 India

A simple, inexpensive and efficient one-pot synthesis of 1,4-dihydropyridines has been accomplished via lithium bromide-catalyzed Hantzsch three-component condensation reaction of an aldehyde, α,β-ketoester and ammonium acetate in acetonitrile at room temperature in good to excellent yields. The present protocol is applicable to wide range of substrates including aliphatic, aromatic and heterocyclic aldehydes affording 1,4-dihydropyridines.

关键词： Hantzsch reaction 1,4-dihydropyridines lithium bromide cyclization one-pot procedure multicomponent reactions

Anticorrosion Performance of Carbon Steel in 55% LiBr Solution Containing PMA/SbBr_3 Inhibitor

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Journal of Iron and Steel Research(International) 2006年第4期13卷 56-60页

作者： HU Xian-qi LIANG Cheng-hao HUANG Nai-bao School of Chemical Engineering Dalian University of Technology Dalian 116012 Liaoning China Electromechanics and Materials Engineering College Dalian Maritime University Dalian 116026 Liaoning China

The anticorrosion performance of carbon steel in 55 % LiBr solution containing PMA/SbBr3 inhibitor was studied by weight-loss tests, electrochemical measurements and surface analysis. In 55 %LiBr＋PMA/SbBr3 solution, corrosion rates of carbon steel at 145 ℃, 175℃, 190℃ and 240℃ are 18.32μm·a^-1 , 27.68μm·a^-1, 53.58μm·a^-1 and 73. 78μm·a^-1 , respectively. PMA/SbBr3 inhibitor may inhibit the corrosion of carbon steel in 55% LiBr solution effectively. Especially, it shows an excellent corrosion inhibition performance at high temperature. Both anodic and cathodic reactions of carbon steel may be inhibited by PMA/SbBr3 inhibitor, so it may be classified as mixed inhibitor. In 55%LiBr＋PMA/SbBr3 solution, the apparent activation energy of the corrosion reaction of carbon steel is 29. 61 kJ·mol^-1. The corrosion inhibition mechanism of PMA/SbBr3 is suggested as follows： PMA has the effect of inhibiting hydrogen evolution and a strong oxidizing property; Sb^3＋ also exhibits oxidizing properties, and can exist stably with PMA in LiBr solutions; the passive film comprising Fe2O3 and antimony formed on carbon steel surface may prevent Brfrom diffusing into the metal surface due to the synergistic effect of PMA and Sb^3＋ ; As a result, the anticorrosion performance of carbon steel may be improved by PMA/SbBr3 inhibitor in 55% LiBr solution.

关键词： carbon steel lithium bromide corrosion inhibitor

Measurement and Correlation of Solubility of LiBr in Binary Solvents Formed by Acetone and Water using LIFAC Model

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Measurement and Correlation of Solubility of LiBr in Binary ...

Isopiestic Measurement of the Thermodynamics Properties for the Aqueous System LiBr-CaBr2-H2O at 373.15 K

2011 International Conference on Fuzzy Systems and Neural Computing(FSNC 2011)

作者： Bo Jiang Li-Sheng Wang Mi-Yi Li School of Chemical Engineering and Environment Beijing Institute of Technology

The solubility of lithium bromide in mixed solvents formed by acetone and water was determined in the temperature range between（293.15 and 323.15） K using a static analytical method. The solubilities of Li Br in mixed water-acetone solutions are predicted with the LIFAC model and its original interaction parameters. The average absolute deviations of the calculated values from the experimental data and mean relative deviations for this system were 0.0742 and 0.7349, *** results show that the LIFAC model can be used to predict solid-liquid equilibrium of Acetone + water + lithium bromide.

关键词： LIFAC model electrolyte solution lithium bromide acetone-water mixed solvent

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Isopiestic Measurement of the Thermodynamics Properties for ...