Kinetic analysis of the conversion of aqueous erythritol solution on Ir/ReOx/TiO2 in a batch slurry reactor

VIRGILIO, EMANUEL M.; MARÍA EUGENIA SAD; CRISTINA LILIANA PADRÓ

APPLIED CATALYSIS A-GENERAL

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2022 vol. 643 p. 118691 - 118702

0926-860X

The influence of temperature, H2 pressureand erythritol concentration on the hydrogenolysis of erythritol was studiedusing Ir/ReOx/TiO2. Under the conditions used here, fourreaction routes coexist: isomerization, dehydration, C-O and C-Chydrogenolysis. The initial rates as well as reaction orders and activationenergy were estimated for each pathway. The variation of the hydrogen pressureproduced slight changes in the isomerization, dehydration and C-Chydrogenolysis routes, whereas C-O hydrogenolysis showed order 1 with respectto this reagent. The change in erythritol concentration affected more thedehydration, resulting in a reaction order for this reactant close to 1, whilefor the other routes the order was close to 0.5. Regarding the influence of thetemperature, dehydration of erythritol showed the highest activation energy(212.1 kJ mol-1) and the isomerization the lowest (20.0 kJ mol-1).Furthermore, it was found that the ruptures of C-C bonds require higher energythan C-O bonds break.