@article{MTMT:2725898,
	title = {An improved catalytic system for the reduction of levulinic acid gamma-valerolactone},
	url = {https://m2.mtmt.hu/api/publication/2725898},
	author = {Tukacs, József Márk and Novák, Márton and Dibó, Gábor and Mika, László Tamás},
	doi = {10.1039/c4cy00719k},
	journal-iso = {CATAL SCIENCE & TECHNOLOGY},
	journal = {CATALYSIS SCIENCE & TECHNOLOGY},
	volume = {4},
	unique-id = {2725898},
	issn = {2044-4753},
	abstract = {An improved bidentate phosphine-modified recyclable catalytic system was developed for the selective conversion of biomass-derived levulinic acid into gamma-valerolactone with a TOF of 21 233 h(-1) in solvent-, chlorine- and additive-free reaction environments.},
	year = {2014},
	eissn = {2044-4761},
	pages = {2908-2912}
}

@article{MTMT:2500395,
	title = {Selective Conversion of Levulinic and Formic Acids to γ-Valerolactone with the Shvo Catalyst},
	url = {https://m2.mtmt.hu/api/publication/2500395},
	author = {Viktória, Fábos and Mika, László Tamás and Horváth, István Tamás},
	doi = {10.1021/om400938h},
	journal-iso = {ORGANOMETALLICS},
	journal = {ORGANOMETALLICS},
	volume = {33},
	unique-id = {2500395},
	issn = {0276-7333},
	year = {2014},
	eissn = {1520-6041},
	pages = {181-187},
	orcid-numbers = {Horváth, István Tamás/0000-0002-6324-186X}
}

@article{MTMT:3181637,
	title = {Catalytic Conversion of Fructose to gamma-Valerolactone in gamma-Valerolactone},
	url = {https://m2.mtmt.hu/api/publication/3181637},
	author = {Qi, L and Horváth, István Tamás},
	doi = {10.1021/cs300428f},
	journal-iso = {ACS CATAL},
	journal = {ACS CATALYSIS},
	volume = {2},
	unique-id = {3181637},
	issn = {2155-5435},
	abstract = {The one-pot conversion of fructose to gamma-valerolactone (GVL) in GVL as solvent was confirmed by monitoring the dehydration of C-13(6)-D-fructose to C-13(6)-5-(hydroxymethyl)-2-furaldehyde (C-13(6)-HMF), the hydration of C-13(6)-HMF to C-13(5)-levulinic and C-13-formic acids, followed by their conversion to C-13(5)-GVL.},
	year = {2012},
	eissn = {2155-5435},
	pages = {2247-2249},
	orcid-numbers = {Horváth, István Tamás/0000-0002-6324-186X}
}

@article{MTMT:2042107,
	title = {Valorization of Biomass: Deriving More Value from Waste},
	url = {https://m2.mtmt.hu/api/publication/2042107},
	author = {Tuck, Christopher O and Pérez, Eduardo and Horváth, István Tamás and Sheldon, Roger A and Poliakoff, Martyn},
	doi = {10.1126/science.1218930},
	journal-iso = {SCIENCE},
	journal = {SCIENCE},
	volume = {337},
	unique-id = {2042107},
	issn = {0036-8075},
	abstract = {Most of the carbon-based compounds currently manufactured by the chemical industry are derived from petroleum. The rising cost and dwindling supply of oil have been focusing attention on possible routes to making chemicals, fuels, and solvents from biomass instead. In this context, many recent studies have assessed the relative merits of applying different dedicated crops to chemical production. Here, we highlight the opportunities for diverting existing residual biomass—the by-products of present agricultural and food-processing streams—to this end.},
	year = {2012},
	eissn = {1095-9203},
	pages = {695-699},
	orcid-numbers = {Horváth, István Tamás/0000-0002-6324-186X}
}

@article{MTMT:1767681,
	title = {gamma-Valerolactone - a sustainable liquid for energy and carbon-based chemicals},
	url = {https://m2.mtmt.hu/api/publication/1767681},
	author = {Horváth, István Tamás and Mehdi, Hasan and Fabos, V and Boda, L and Mika, László Tamás},
	doi = {10.1039/b712863k},
	journal-iso = {GREEN CHEM},
	journal = {GREEN CHEMISTRY},
	volume = {10},
	unique-id = {1767681},
	issn = {1463-9262},
	abstract = {We propose that gamma-valerolactone (GVL), a naturally occurring chemical in fruits and a frequently used food additive, exhibits the most important characteristics of an ideal sustainable liquid, which could be used for the production of both energy and carbon-based consumer products. GVL is renewable, easy and safe to store and move globally in large quantities, has low melting (231 degrees C), high boiling (207 degrees C) and open cup flash (96 degrees C) points, a definitive but acceptable smell for easy recognition of leaks and spills, and is miscible with water, assisting biodegradation. We have established that its vapor pressure is remarkably low, even at higher temperatures (3.5 kPa at 80 degrees C). We have also shown by using (18)O-labeled water that GVL does not hydrolyze to gamma-hydroxypentanoic acid under neutral conditions. In contrast, after the addition of acid (HCl) the incorporation of one or two (18)O-isotopes to GVL was observed, as expected. GVL does not form a measurable amount of peroxides in a glass flask under air in weeks, making it a safe material for large scale use. Comparative evaluation of GVL and ethanol as fuel additives, performed on a mixture of 10 v/v% GVL or EtOH and 90 v/v% 95-octane gasoline, shows very similar properties. Since GVL does not form an azeotrope with water, the latter can be readily removed by distillation, resulting in a less energy demanding process for the production of GVL than that of absolute ethanol. Finally, it is also important to recognize that the use of a single chemical entity, such as GVL, as a sustainable liquid instead of a mixture of compounds, could significantly simplify its worldwide monitoring and regulation.},
	year = {2008},
	eissn = {1463-9270},
	pages = {238-242},
	orcid-numbers = {Horváth, István Tamás/0000-0002-6324-186X}
}

@article{MTMT:1482706,
	title = {Integration of homogeneous and heterogeneous catalytic processes for a multi-step conversion of biomass: From sucrose to levulinic acid, gamma-valerolactone, 1,4-pentanediol, 2-methyl-tetrahydrofuran, and alkanes},
	url = {https://m2.mtmt.hu/api/publication/1482706},
	author = {Mehdi, Hasan and Fabos, V and Tuba, Róbert and Bodor, Andrea and Mika, László Tamás and Horváth, István Tamás},
	doi = {10.1007/s11244-008-9047-6},
	journal-iso = {TOP CATAL},
	journal = {TOPICS IN CATALYSIS},
	volume = {48},
	unique-id = {1482706},
	issn = {1022-5528},
	abstract = {The multi-step conversion of sucrose to various C-5-oxygenates and alkanes was achieved by integrating various homogeneous and heterogeneous catalytic systems. We have confirmed that the dehydration of sucrose to levulinic and formic acids is currently limited to about 30-40% in the presence of H2SO4, HCl, or Nafion NR50 in water. Performing the dehydration in the presence of a P(m-C6H4SO3Na)(3) modified ruthenium catalyst under hydrogen resulted in the in situ conversion of levulinic acid to gamma-valerolactone (GVL). Levulinic acid can be hydrogenated to GVL quantitatively by using P(m-C6H4SO3Na)(3) modified ruthenium catalyst in water or Ru(acac)(3)/PBu3/NH4PF6 catalyst in neat levulinic acid. Formic acid can be used for the transfer hydrogenation of levulinic acid in water in the presence of [(eta(6)-C6Me6)Ru(bpy)(H2O)][SO4] resulting in GVL and 1,4-pentanediol. The hydrogenation of levulinic acid or GVL can be performed to yield 1,4-pentanediol and/or 2-methyl-tetrahydrofuran (2-Me-THF). The hydrogenolysis of 2-Me-THF in the presence of Pt(acac)(2) in CF3SO3H resulted in a mixture of alkanes. We have thus demonstrated that the conversion of carbohydrates to various C-5-oxygenates and even to alkanes can be achieved by selecting the proper catalysts and conditions, which could provide a renewable platform for the chemical industry.},
	year = {2008},
	eissn = {1572-9028},
	pages = {49-54},
	orcid-numbers = {Bodor, Andrea/0000-0002-7422-298X; Horváth, István Tamás/0000-0002-6324-186X}
}