Effects of thermal treatment of ZnO-ZnCr2O4 catalyst on the particle size and product selectivity in dehydrocyclization of crude glycerol and ethylenediamine

TitleEffects of thermal treatment of ZnO-ZnCr2O4 catalyst on the particle size and product selectivity in dehydrocyclization of crude glycerol and ethylenediamine
Publication TypeJournal Article
Year of Publication2016
AuthorsSarkari, R, Krishna, V, Sudhakar, M, Rao, TVenkateshw, Padmasri, AHari, Srinivas, D, Venugopal, A
JournalKinetics and Catalysis
Volume57
Issue5
Pagination602-609
Date PublishedSEP
AbstractThe ZnO-ZnCr2O4 (Zn-Cr-O) sample obtained by decomposition of Zn-Cr hydrotalcite precursor was subjected to the thermal treatment at different temperatures and the physico-chemical properties of the Zn-Cr-O system were compared with its catalytic behavior in dehydrocyclization of crude glycerol and ethylenediamine (EDA). Upon high temperature treatment of Zn-Cr-O the Cr6+ ions underwent autoreduction to form stable Cr3+ species and the particle size of both ZnO and ZnCr2O4 increased dramatically. Thermal effect did not influence the intermolecular cyclisation of EDA to form pyrazine. By contrast, an inversely proportional dependence was found between the rate of formation of 2-methylpyrazine and the particle size of Zn-Cr-O whereas the rate of 2-pyrazinylmethanol was directly proportional to the particle size.
DOI10.1134/S0023158416050177
Type of Journal (Indian or Foreign)Foreign
Impact Factor (IF)0.632
Divison category: 
Catalysis and Inorganic Chemistry