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化学反应活化能的定义及其与势垒的关系 被引量:5
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作者 刘国杰 黑恩成 《大学化学》 CAS 2013年第5期73-76,共4页
提出了反应活化能的定义,指出Arrhenius活化能只是其中的一种特殊情况,并阐明了反应活化能与势垒的关系。
关键词 反应活化能 arrhenius活化能 过渡状态理论 势垒
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Numerical simulation for Darcy-Forchheimer 3D rotating flow subject to binary chemical reaction and Arrhenius activation energy
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作者 Tasawar HAYAT Arsalan AZIZ +1 位作者 Taseer MUHAMMAD Ahmed ALSAEDI 《Journal of Central South University》 SCIE EI CAS CSCD 2019年第5期1250-1259,共10页
Three-dimensional Darcy-Forchheimer nanoliquid flow in the presence of rotating frame and activation energy is inspected.Flow is developed through linearly stretching of the surface.Convection of heat and mass exchang... Three-dimensional Darcy-Forchheimer nanoliquid flow in the presence of rotating frame and activation energy is inspected.Flow is developed through linearly stretching of the surface.Convection of heat and mass exchange is given due consideration.The novel characteristics in regards to Brownian dispersion and thermophoresis are retained.The variation in partial differential framework (PDEs) to nonlinear ordinary differential framework (ODEs) is done through reasonable transformations.Governing differential frameworks have been computed in edge of NDSolve.Discussion regarding thermal field and concentration distribution for several involved parameters is pivotal part.Physical amounts like surface drag coefficients,transfer of heat and mass rates are portrayed by numeric esteems.It is noticed that impacts of porosity parameter and Forchheimer number on the thermal and concentration fields are quite similar.Both temperature and associated thermal layer thickness are enhanced for larger porosity parameter and Forchheimer number.Temperature and concentration fields exhibit similar trend for the higher values of rotational parameter.Effects of thermal and concentration Biot numbers on the temperature and concentration fields are qualitatively similar.Higher Prandtl and Schmidt numbers correspond to stronger temperature and concentration fields.Larger nondimensional activation energy,temperature difference parameter and fitted rate constant yield weaker concentration field.Brownian motion parameter for temperature and concentration has reverse effects while similar trend is observed via thermophoresis parameter. 展开更多
关键词 nanoparticles rotating frame arrhenius activation energy Darcy-Forchheimer porous space numerical solution
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Arrhenius活化能理论的修正 被引量:9
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作者 刘国杰 黑恩成 《大学化学》 CAS 2013年第2期77-80,共4页
针对Arrhenius活化能理论的不足,修正了这个理论,建立了一个修正的Arrhenius方程,它能适用于更宽的温度范围。
关键词 arrhenius活化能理论 活化能 过渡状态理论 分解频率 平均振动量子数
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探究合成树脂和天然树脂对热熔压敏胶性能的影响
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作者 薛静 王鸣 +2 位作者 黄昊飞 刘然升 王晶 《中国胶粘剂》 CAS 北大核心 2020年第4期15-19,共5页
采用单因素法探究天然树脂和合成树脂对热熔压敏胶性能的影响。研究结果表明:热熔压敏胶高分子溶液可以用Arrhenius黏流活化能方程来拟合。增黏树脂可赋予热熔压敏胶黏附性能,合成树脂有利于热熔压敏胶环形初粘力和持粘力的提高,天然树... 采用单因素法探究天然树脂和合成树脂对热熔压敏胶性能的影响。研究结果表明:热熔压敏胶高分子溶液可以用Arrhenius黏流活化能方程来拟合。增黏树脂可赋予热熔压敏胶黏附性能,合成树脂有利于热熔压敏胶环形初粘力和持粘力的提高,天然树脂有利于热熔压敏胶180°剥离力和软化点的提高。适量提高天然树脂质量百分比有利于提升热熔压敏胶的环形初粘力、180°剥离力和持粘力。 展开更多
关键词 热熔压敏胶 天然树脂 合成树脂 arrhenius黏流活化能方程 黏附性
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