Hydrogen production from decalin over silica-supported platinum catalysts: a kinetic and thermodynamic study

• Published in: Reaction kinetics, mechanisms and catalysis mechanisms and catalysis, 2021-08, Vol.133 (2), p.713-728
• Main Authors: Martynenko, Evgeniya A., Vostrikov, Sergei V., Pimerzin, Aleksey A.
• Format: Article
• Language: English
• Subjects: Catalysis; Chemistry; Chemistry and Materials Science; Industrial Chemistry/Chemical Engineering; Physical Chemistry
• ISSN: 1878-5190; 1878-5204
• DOI: 10.1007/s11144-021-02037-1

Decalin dehydrogenation for efficient hydrogen production over platinum catalysts supported on different types of silica was studied. The catalytic properties of the prepared catalysts were tested under conditions of a flow installation. It was found that from a thermodynamic point of view, high temperatures will favor dehydrogenation, and low temperatures will favor the isomerization of cis -decalin to trans -decalin. It negatively affects the rate of decalin dehydrogenation; therefore, kinetic control is required. It was shown that the catalysts supported on mesoporous silica MCM-48 and SBA-15 showed a significantly higher catalytic activity during decalin dehydrogenation compared to catalysts supported on amorphous SiO 2 . The high surface area and small pore size of these supports positively affect Pt particles’ dispersion and result in the production of high-active catalysts for dehydrogenation of decalin to naphthalene. The maximum decalin conversion was observed over the 2% Pt/MCM-48 catalyst at a pressure of 0.5 MPa, a 325 °C temperature, and an LHSV of 20 h −1 . This study provides a rationale for the proper support selection for efficient utilization of decalin as a LOHC. Graphic abstract