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Isoconversion Effective Activation Energy Profiles by Variable Temperature Diffuse Reflection Infrared Spectroscopy

机译:等温转换有效活化能谱的可变温度扩散反射红外光谱

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Thermal process characterization based on calculating effective activation energies from variable temperature diffuse reflection infrared spectroscopy (VT-DRIFTS) measurements is demonstrated. Experimental factors that affect the accuracies of activation energy values are outlined. Infrared radiation scattering efficiency, thermal conductivity, and inertness towards chemical reactions are factors that should be considered when selecting an appropriate diluent for preparing samples. The Kubelka–Munk representation is superior to apparent absorbance when baseline variations in spectra measured at different temperatures can be minimized. Variable-temperature infrared spectral features, such as integrated absorption band area, can be used to compute isoconversion effective activation energies, provided that measured quantities are proportional to species concentrations.
机译:演示了基于通过可变温度漫反射红外光谱(VT-DRIFTS)测量计算有效活化能的热过程表征。概述了影响活化能值准确性的实验因素。在选择合适的稀释剂用于制备样品时,应考虑红外辐射的散射效率,导热率和对化学反应的惰性。当可以最小化在不同温度下测量的光谱的基线变化时,Kubelka-Munk表示优于表观吸收。只要测量的量与物质浓度成正比,可变温度的红外光谱特征(例如积分吸收带面积)可用于计算等转换有效活化能。

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    《Applied Spectroscopy》 |2008年第1期|116-120|共5页
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