Ethanol dry reforming (EDR) has attracted considerable attention as a sustainable route for syngas production, owing to its potential to utilize renewable ethanol and mitigate CO 2 emissions simultaneously. In this work, the EDR reaction was investigated over Ni–Pd/CeO 2 catalysts, synthesized via impregnation and tested in a fixed‐bed reactor under varying temperatures (500°C–900°C) and carbon‐to‐ethanol ratios (C/E) of 1–3. A comprehensive kinetic analysis was performed using two adsorption‐based mechanistic models: Langmuir–Hinshelwood (LH) and Langmuir–Freundlich (LF). Both models were formulated based on a dual‐site mechanism, considering Ni as the primary active site and Pd as a secondary site. Experimental results indicated that ethanol reforming is kinetically favored compared to ethanol decomposition (ED) and methane dry reforming (MDR), though competitive ED pathways reduced syngas selectivity. Kinetic parameters, including activation energies and pre‐exponential factors, were estimated using hybrid optimization methods, and their temperature dependencies were validated against Arrhenius and Van’t Hoff relations. Model evaluation revealed that while the LH formulation better described ethanol conversion, the LF model provided superior predictive reliability for CO 2 conversion and syngas yields by accounting for adsorption heterogeneity. Overall, the findings underscore the importance of adsorption modeling in capturing EDR kinetics and highlight Ni–Pd/CeO 2 as a promising catalytic system for efficient and sustainable syngas production.
Cherati et al. (Thu,) studied this question.