The research results about the influence of BEA zeolite preliminary dealumination on the acid-base characteristics and catalytic performance of 1%Zn-BEA compositions in propane dehydrogenation with CO2 are presented. The catalyst samples, prepared by a two-step post-synthesis procedure, involving partial or complete dealumination of the BEA specimen followed by the introduction of Zn 2+ cations into the T-positions of zeolite framework, were characterized by XRD, 21 XPS, MAS NMR, low-temperature N2 ad/desorption, C3H8/C3H6 (CO2, NH3)-TPD, TPO-O2, and 22 FTIR-Py techniques. Full dealumination resulted in the development of a mesoporous structure 23 and specific surface area (BET) with a twofold decrease in the total acidity and basicity of Zn-BEA, 24 the formation of Lewis acid sites and basic sites of predominantly medium strength, as well as the 25 removal of Brønsted acid sites from the surface. In the presence of ZnSiBEA catalyst, with the 26 lowest total acidity and basicity, the obtained selectivity of 86-94 % and yield of 30-33 % related to 27 propene (at 923 K) exceeded the values for ZnAlSiBEA and ZnAlBEA. The results of propane 28 dehydrogenation with/without carbon dioxide showed the advantages of producing the target 29 olefin in the presence of CO2 using Zn-BEA catalysts.