Journal
RSC ADVANCES
Volume 10, Issue 35, Pages 20395-20404Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ra04018e
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Funding
- MINECO [MAT2017-84118-C2-2-R, MAT2017-84118-C2-1-R]
- FEDER
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In the present article, gamma-valerolactone has been obtained from levulinic acid with a yield exceeding 25% using very mild conditions without feeding hydrogen (30 degrees C, atmospheric pressure, water as the hydrogen source). The overall reaction conducted is a two-step process: first, a redox reaction involving the oxidation of metallic Zn to ZnO for in situ hydrogen production through the water splitting reaction and, second, a catalytic reaction involving Ni-supported catalysts for the production of gamma-valerolactone from levulinic acid. Ni active sites have been supported on sepiolite, an abundant and cheap material. The nickel particle size has been demonstrated to be a parameter of paramount importance determining the catalytic activity, since the best catalytic performance is obtained with the smallest Ni nanoparticles. This combination of Zn and Ni supported on sepiolite shows a good catalytic stability after three catalytic runs.
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