Mika, László Tamás

Repository of the Academy's Library

Homogeneous catalysis in biomass conversion László T. Mika Associate Professor Department of Chemical and Environmental Process Engineering Budapest University of Technology and Economics, e-mail: laszlo.t.mika@mail.bme.hu  The replacement of fossil resources, which provide more than 95 % of our energy needs and feedstock of chemical industry is one of the most challenging tasks of our generation. Accordingly, the production of carbon-based chemicals from sustainable resources has become a key issue for the chemical technology. The intensive research activities on biomass conversion has led to the identification of unique platform molecules such as 5-hydroxymethyl furfural,1 and its key derivatives levulinic acid (LA) and derivatives γ-valerolactone (GVL).2 These small molecules could replace the currently used fossil-based chemicals or serve as renewable feedstock for their production. The selective conversion of non-edible components of biomass, such as cellulose or chitin could provide an alternative route for the production of these platform chemicals. Since the most efficient route to manufacture GVL is the hydrogenation of LA, the development of selective catalyst is another crucial point of the efficient biomass conversion. It was established that fructose, glucose, cellulose, and chitin can be converted to LA in the presence of sulfuric acid using either conventional or microwave dielectric heating with yield of 20 – 40 wt%.3 We have developed different recyclable Ru-based catalyst systems4 that can quantitatively reduce LA to GVL under solvent and any additive free, “green” conditions achieving turnover number over 21000 h–1.   COOHORu-based catalysts O OLevulinic acid γ-valerolactoneBiomass resources dehydrationEnergy and carbon based chemicalsH+ + H2  The catalyst design and development for biomass conversion producing LA and GVL from verious resources will be presented. The selected application of GVL e.g. alternative solvent for catalysis5 and the syntesis of optically active GVL as a chiral renewable building block will be discussed as well.                                              1 Gallezot, P. Chem. Soc. Rev., 2012, 41, 1538. 2 Horváth, I. T.; Mehdi, H.; Fábos, V.; Boda, L.; Mika, L. T. Green. Chem, 2008, 10, 238. 3 (a) Mehdi, H.; Fábos, V.; Tuba, R.; Bodor, A.; Mika, L. T., Horváth, I. T. Top. Catal., 2008, 48, 49. (b) Szabolcs, Á.; Molnár, M.; Dibó, G.; Kégl, T.; Mika, L. T. Green Chem., 2013, 15, 439. (c) Novodárszki, G.; Rétfalvi, N.; Dibó, G.; Mizsey, P.; Cséfalvay, E.; Mika, L. T. RSC Advances, 2014, 4, 2081. (d) Qi, L.; Mui, Y.F.; Lo, S.W.; Lui, M.Y.; Akien, G.R.; Horváth, I.T. ACS Catal. 2014, 4, 1470. 4 (a) Tukacs J. M, Kiraly D., Stradi A., Novodarszki Gy., Eke Zs., Dibo G., Kegl T., Mika L. T Green Chem., 2012, 14, 2057. (b) Fábos, V.; Mika, L. T.; Horváth I. T. Organometallics, 2014, 33, 181. (c) Tukacs J. M, Novák M., Dibo G., Mika L. T Catal. Sci. Technol., 2014, 4, 2908. 5 Strádi A., Molnár M., Óvári M., Frank U. R., Dibó G., Mika L. T. Green Chem., 2013, 15, 1587. 

Homogeneous catalysis in biomass conversion

The replacement of fossil resources, which provide more than 95 % of our energy needs and feedstock of chemical industry is one of the most challenging tasks of our generation. Accordingly, the production of carbon-based chemicals from sustainable resources has become a key issue for the chemical technology. The intensive research activities on biomass conversion has led to the identification of unique platform molecules such as 5-hydroxymethyl furfural 1, and its key derivatives levulinic acid (LA) and derivatives g-valerolactone (GVL). 2 These small molecules could replace the currently used fossil-based chemicals or serve as renewable feedstock for their production. The selective conversion of non-edible components of biomass, such as cellulose or chitin could provide an alternative route for the production of these platform chemicals. Since the most efficient route to manufacture GVL is the hydrogenation of LA, the development of selective catalyst is another crucial point of the efficient biomass conversion. It was established that fructose, glucose, cellulose, and chitin can be converted to LA in the presence of sulfuric acid using either conventional or microwave dielectric heating with yield of 20 – 40 wt%.3 We have developed different recyclable Ru-based catalyst systems 4that can quantitatively reduce LA to GVL under solvent and any additive free, “green” conditions achieving turnover number over 21000 h–1.          The catalyst design and development for biomass conversion producing LA and GVL from verious resources will be presented. The selected application of GVL e.g. alternative solvent for catalysis 5 and the syntesis of optically active GVL as a chiral renewable building block will be discussed as well.   Gallezot, P. Chem. Soc. Rev., 2012, 41, 1538. Horváth, I. T.; Mehdi, H.; Fábos, V.; Boda, L.; Mika, L. T. Green. Chem, 2008, 10, 238. (a) Mehdi, H.; Fábos, V.; Tuba, R.; Bodor, A.; Mika, L. T., Horváth, I. T. Top. Catal., 2008, 48, 49. (b) Szabolcs, Á.; Molnár, M.; Dibó, G.; Kégl, T.; Mika, L. T. Green Chem., 2013, 15, 439. (c) Novodárszki, G.; Rétfalvi, N.; Dibó, G.; Mizsey, P.; Cséfalvay, E.; Mika, L. T. RSC Advances, 2014, 4, 2081. (d) Qi, L.; Mui, Y.F.; Lo, S.W.; Lui, M.Y.; Akien, G.R.; Horváth, I.T. ACS Catal. 2014, 4, 1470. (a) Tukacs J. M, Kiraly D., Stradi A., Novodarszki Gy., Eke Zs., Dibo G., Kegl T., Mika L. T Green Chem., 2012, 14, 2057. (b) Fábos, V.; Mika, L. T.; Horváth I. T. Organometallics, 2014, 33, 181. (c) Tukacs J. M, Novák M., Dibo G., Mika L. T Catal. Sci. Technol., 2014, 4, 2908. Strádi A., Molnár M., Óvári M., Frank U. R., Dibó G., Mika L. T. Green Chem., 2013, 15, 1587.   CBC SEMINAR ANNOUNCEMENT  Professor László T. Mika  Budapest University of Technology and Economics Homogeneous catalysis in biomass conversion Date: 1st September 2014 (Monday)  Time: 11:00am – 12:30pm Venue: NTU SPMS CBC Building Level 2,  Conference Room Host:  Asst Professor Dragoslav Vidovic SCHOOL OF PHYSICAL AND MATHEMATICAL SCIENCES DIVISION OF CHEMISTRY & BIOLOGICAL CHEMISTRY SPMS-CBC-02-01, 21 NANYANG LINK, SINGAPORE 637371 

Homogeneous catalysis in biomass conversion

Abstract

Similar works

Full text

Available Versions

Repository of the Academy's Library

Repository of the Academy's Library