, Model validationAs the integrated SECLR-WS process presents a new concept, experimental data for the proposed process is quite limited. However, the model of the proposed process developed in this study is derived from two basic chemical looping processes: SECLR and CLWS. Thus, the parts of the SECLR-WS process were individually validated. The first part of the SECLR-WS model, which involves the SECLR process, was validated using the experimental data reported by Rydén and Ramos (2012). Pure CH4 was used as feedstock and chemical looping reforming took place in a fluidized bed reactor. The temperature of the FR was varied in the 600 – 750 °C range, and the input parameters: SFR/CH4, NiO/CH4, and CaO/CH4 molar ratios were 1.8, 1, and 1, respectively. Table 4.3 shows the resulting H2 and CO2 concentrations from the experimental results and simulation data of the SECLR process. It was found that the model predictions were in good agreement with the experimentally obtained H2 concentrations. The over-estimation of the CO2 concentration at high temperatures occurred from the incomplete conversion of CH4 in the experimental process. CH4 conversion can be improved using higher SFR/CH4 molar ratios than indicated by the equilibrium conditions (Rydén and Ramos, 2012). The CLWS process was validated using the experimental results reported by Edrisi et al. (2014) under the same conditions (Table 4.4). It was found that the predictive results of the CLWS model were in good agreement with the experimental data (Table 4.5). From the validation results presented here, the developed model of the SECLR-WS process consisting of the SECLR and CLWS models will be used to analyze the performance of the process.