IR spectrometer has been successfully applied as detector for temperature-programmed techniques, i.e. NH3-TPD and H2-TPR, demonstrating an excellent flexibility, robustness and effectiveness in the proposed study. IR allowed also to detect unexpected or coproduced compounds and to avoid in many cases the expensive coupling of different techniques. For NH3-TPD, a successful qualitative and quantitative determination has been achieved with an excellent signal/noise ratio and on materials characterized by different: Brønsted/Lewis acidity, thermal pretreatment, doping elements and oxidation activity. For H2-TPR, the reducibility of different supported Ni-based catalytic systems has been successfully investigated following vapor formation and identifying different Ni species.
On the use of infrared spectrometer as detector for Temperature Programmed (TP) techniques in catalysts characterization
PHUNG, THANH KHOA;GARBARINO, GABRIELLA
2017-01-01
Abstract
IR spectrometer has been successfully applied as detector for temperature-programmed techniques, i.e. NH3-TPD and H2-TPR, demonstrating an excellent flexibility, robustness and effectiveness in the proposed study. IR allowed also to detect unexpected or coproduced compounds and to avoid in many cases the expensive coupling of different techniques. For NH3-TPD, a successful qualitative and quantitative determination has been achieved with an excellent signal/noise ratio and on materials characterized by different: Brønsted/Lewis acidity, thermal pretreatment, doping elements and oxidation activity. For H2-TPR, the reducibility of different supported Ni-based catalytic systems has been successfully investigated following vapor formation and identifying different Ni species.
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