| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 39368 | Applied Catalysis A: General | 2015 | 7 Pages |
•New Zn-based heterogeneous catalysts for the ethanolysis of urea are described.•The role of different frameworks on the stabilization of Zn centres has been determined.•The Zn-leaching in the reaction medium is strongly reduced with respect to pure ZnO.•The new catalysts have a higher specific activity (per Zn-centre) with respect to ZnO.•The heterogeneous catalysts are easily recovered and recycled.
New Zn-based catalysts are described that act as heterogenized or heterogeneous catalysts, with easy recovery and re-utilization with a limited or even zero Zn-leaching. For stabilizing in the heterogeneous form the catalytically active Zn centre, mixed oxides, ZIF-8 and Zn-tethered systems have been synthesized and found to sensibly reduce the leaching of Zn in solution with respect to ZnO, making possible their recovery and reuse. ZIF-8 can be used for long time of reaction, reaching high DEC yields (comparable or higher than those obtained with ZnO) without any significant loss of zinc.
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