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Activated carbon modification towards efficient catalyst for high value-added products synthesis from alpha-pinene Srenscek Nazzal, Joanna Miadlicki, Piotr Wróblewska, Agnieszka Serafin, Jaroslaw Michalkiewicz, Beata Universitat Politècnica de Catalunya. Doctorat en Enginyeria de Processos Químics Àrees temàtiques de la UPC::Enginyeria dels materials Catalysts Alpha-pinene isomerization Commercial activated carbon Acid treatment Catalitzadors DT0-activated carbons modified with HCl and HNO3 acids, which were used for the first time in the catalytic process of alpha-pinene isomerization, are presented in this study. The carbon materials DT0, DT0_HCl, DT0_HNO3, and DT0_HCl_HNO3 were examined with the following methods: XRF, SEM, EDX, XPS, FT-IR, XRD, and N2 adsorption at -196 °C. It was shown that DT0_HCl_HNO3-activated carbon was the most active material in the alpha-pinene isomerization process. Detailed studies of alpha-pinene isomerization were carried out over this carbon by changing the reaction parameters such as time (5–180 min) and temperature (60–175 °C). The 100% conversion of alpha-pinene was achieved at the temperature of 160 °C and catalyst content of 5 wt% after 3 h over the DT0_HCl_HNO3 catalyst. Camphene and limonene were the main products of the alpha-pinene isomerization reaction.</jats:p> Peer Reviewed Postprint (published version) 2021-12-17 Article Srenscek, J. [et al.]. Activated carbon modification towards efficient catalyst for high value-added products synthesis from alpha-pinene. "Materials", 17 Desembre 2021, vol. 14, núm. 24, p. 7811:1-7811:21. 1996-1944 https://hdl.handle.net/2117/360841 10.3390/ma14247811 eng https://www.mdpi.com/1996-1944/14/24/7811 http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Open Access Attribution-NonCommercial-NoDerivs 3.0 Spain application/pdf Multidisciplinary Digital Publishing Institute (MDPI)