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This paper gives details of a tentative modeling study that investigates the inhibiting effect of internal reactor walls treated with acid or metal oxides on low-temperature autoignition phenomena. Reactions that depend on the type of reactor wall coating have been considered for HO₂ and RO₂ radicals and H₂O₂ with estimated rate constants. These heterogeneous reactions have been incorporated into a homogeneous comprehensive n-butane oxidation mechanism. Simulations have been performed with spatial uniformity assumed, in order to assess the effect of the wall reactions on autoignition delay times and on a pressure−ambient temperature (p−T_a) ignition diagram. Experimental comparisons show that the main trends are qualitatively captured well by the model. Simulation results show an importance of RO₂ wall reactions at temperatures below 750 K that control the minimum autoignition temperature. HO₂ …