Towards Production of gamma-valerolactone via Hydrogenation of Aqueous Levulinic Acid
2015 (English)In: International journal of Chemical Reactor Engineering, ISSN 1542-6580, Vol. 13, no 1, 119-127 p.Article in journal (Refereed) Published
Synthesis of GVL (gamma-valerolactone) via hydrogenation of aqueous LA (levulinic acid) with H-2 over heterogeneous catalyst (Ru/C) was investigated. In the first part, a study of the influence of various operating conditions was conducted including that of temperature (90-180 degrees C), stirring rate (500-1200 rpm), catalyst loading (0.1-2.0 g), hydrogen pressure (0.4-2.8 MPa) and initial LA concentration (0.5-2 M). In the second part, influence of supercritical CO2 (scCO(2)) on hydrogenation rate and GVL yield were investigated. Hydrogenation of aqueous LA under scCO(2) and under N-2 atmosphere was carried out in batch reactor at 150 degrees C and was compared with the case when no additional gases were present. The result indicated that the use of scCO(2) had no beneficial effect neither in terms of LA conversion nor hydrogenation rate when the amount of hydrogen was relatively low compared to the stoichiometry. This effect was mitigated when more hydrogen was present.
Place, publisher, year, edition, pages
2015. Vol. 13, no 1, 119-127 p.
gamma-valerolactone, hydrogenation, levulinic acid, ruthenium, supercritical CO2, biomass valorization, green chemistry
IdentifiersURN: urn:nbn:se:umu:diva-106516DOI: 10.1515/ijcre-2014-0077ISI: 000355586100002OAI: oai:DiVA.org:umu-106516DiVA: diva2:841917