DBPapers
DOI: 10.5593/sgem2017/42/S17.074

THE KINETIC RESEARCH OF CELLULOSE CONVERSION TO POLYOLS

E. Sulman, A. Filatova, O. Manaenkov, V. Molchanov, V. Matveeva
Tuesday 12 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7408-07-2 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 42, 591-598 pp, DOI: 10.5593/sgem2017/42/S17.074

ABSTRACT

This work is aimed at studying of the kinetics of the cellulose hydrolytic hydrogenation process. In the course of the study, the methodology of the process in a high-pressure reactor under subcritical water conditions in the presence of the optimal synthesised catalyst, 3% Ru based on hypercrosslinked polystyrene MN 270 (Purolite Ltd, UK) (3% Ru/MN 270) was developed. The optimal parameters of the cellulose hydrolytic hydrogenation process were selected: the temperature – 205 °C, the hydrogen partial pressure – 6 MPa, reaction time – 60 min, Ru/cellulose ratio (mmol Ru in the composite per 1 g of cellulose) – 0.042/1, ruthenium content in the composite – 3% (by weight). Under these conditions, cellulose conversion was 64.0%, sorbitol selectivity was 43.5%. The mechanism of the cellulose conversion in subcritical water in the presence of 3%Ru/MN 270 catalyst was proposed. Besides, an adequate kinetic model of the cellulose conversion process was selected basing on the proposed mechanism. The kinetic parameters for the selected model were calculated: activation energy = 45 kJ/mol, the pre-exponential factor K0 = 8.92·106, the reaction rate constant K = 0.102713 (mol/mol)∙s-1.

Keywords: cellulose, hydrolytic hydrogenation, Ruthenium, hypercrosslinked polystyrene