Influence of steric factors on reversible reactions of hydrogenation-dehydrogenation of polycyclic aromatic hydrocarbons on a Pt/C catalyst in hydrogen storage systems

Kinetic Modeling of Hydrogen Production by Dehydrogenation of Polycyclic Naphthenes with Varying Degrees of Condensation

“…At the same time, steric cis - and trans -isomers are formed for decalin and isomers of perhydroterphenyl during the formation of final polycyclic naphthenes, the quantitative ratio between the isomers is indicated in Table 1 . It was also established that the rate of formation of trans -isomers exceeds the rate of formation of cis -isomers, as well as the preceding intermediate products of the reaction [ 8 , 9 , 10 ].…”

“…Taking into account the cis-trans transition during dehydrogenation of decalin, this leads to a decrease in the overall reaction rate and affects the completeness of hydrogen release. Because of the smaller differences in the structure of cis - and trans -conformations from linear-jointed molecules of perhydroterphenyl, dehydrogenation curves for their ortho -, meta -, and para -isomers in the investigated range of temperatures differ not so much [ 9 , 10 ].…”

“…One of the reasons that hinder the practical implementation of this approach is the lack of modern systems capable of providing compact storage of hydrogen and its transportation, since hydrogen under normal conditions is a flammable gas. It is shown [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ] that systems based on liquid organic hydrogen carriers (LOHC), in particular, polycyclic hydrocarbons (PH), are a safe and economical way of storing and transporting hydrogen. However, the efficiency of PH-based systems largely depends on the development of a highly active, selective, and stable catalyst.…”

Liquid Organic Hydrogen Carriers or Organic Liquid Hydrides: 40 Years of History

“…For an exhaustive review of the studies carried out in the framework of liquid organic hydrogen carriers, using the unique keyword "LOHC" is dangerous because it excludes all the studies carried out 30 years before the invention of this keyword, but also some recent exploratory studies from groups who are not familiar with this name. The missing informa-tion when searching by the term "LOHC" ranges from molecules (e.g., [39,77]) to reactors (e.g., [52]) through catalysts (e.g., [26,48,50,62]) and kinetics (e.g., [31,36]). Important studies were namely conducted with the so-called MCH/TOL system, either for the development of more stable catalysts for a comprehensive kinetic analysis or for the design of the most appropriate reactor to cope with the high endothermicity of the dehydrogenation reaction.…”

Facile synthesis of silver nanocatalyst decorated Fe3O4@PDA core–shell nanoparticles with enhanced catalytic properties and selectivity

“…In the catalytic reduction of organic dyes, it has been reported that noble metal nanochemistry (e.g. Pt, Pd, Au, Ag) [8][9][10][11] has shown excellent catalytic activity.…”