Phenomenological approaches for quantitative temperature-programmed reduction (TPR) and desorption (TPD) analysis

Temperature-programmed reduction (TPR) and temperature-programmed desorption (TPD) are techniques widely used for catalyst characterization, providing information about active sites. However, results from these experiments usually interpreted with the aid of empirical models, based on representation or profiles as summations reference curves. In this context, phenomenological approaches can present several advantages over traditional approach, in case extracted be theoretical models that allows a deeper understanding properties. For reason, work, modelling evaluated quantitative analysis H2-TPR NH3-TPD profiles, obtained characterization Ni/SiO2 Al2O3 alumina catalysts, respectively, both thoroughly compared discussed first time. Our results, fitting to whole experimental profile by using nonlinear regression, indicate approach considered better should therefore preferred, it significantly more accurate quantification correct discrimination distinct sites, addition simultaneously enabling determination kinetics parameters.