The influence of NHsub.4NOsub.3 and NHsub.4ClOsub.4 on the porous texture and structure development of activated carbons produced from a non-porous polymeric precursor synthesized from furfuryl alcohol has been studied. The non-doped counterparts were prepared and studied for comparison purposes. NHsub.4NOsub.3 and NHsub.4ClOsub.4-doped polymers were carbonized under Nsub.2 atmosphere at 600 °C, followed by COsub.2 activation at 1000 °C and the obtained carbon materials and activated carbons were thoroughly characterized. The porosity characterization data have shown that NHsub.4NOsub.3-derived ACs present the highest specific surface area (up to 1523 msup.2/g in the experimental conditions studied), and the resulting porosity distributions are strongly dependent on the activation conditions. Thus, 1 h activation is optimum for the microporosity development, whereas larger activation times lead to micropores enlargement and conversion into mesopores. The type of doping salts used also has a substantial impact on the surface chemical composition, i.e., C=O groups. Moreover, NHsub.4NOsub.3 and NHsub.4ClOsub.4 constitute good sources of nitrogen. The type and contribution of nitrogen species are dependent on the preparation conditions. Quaternary nitrogen only appears in doped samples prepared by carbonization and pyrrolic, pyrydinic, and nitrogen oxide groups appear in the NHsub.4NOsub.3 -series. NHsub.4NOsub.3 incorporation has led to optimized materials towards COsub.2 and Csub.2Hsub.4 sorption with just 1 h activation time.