Table 3.
LA conversion (XLA), GVL yield (YGVL), and selectivity toward GVL (SGVL) in the hydrogenation of LA using different reducing agents, i.e., FA or H2, over 3PtY and 3PtY silylated with n-octadecyltrichlorosilane (3PtY3Cl18C0.5) or methyltrichlorosilane with different silane/zeolite ratios (0.5 or 10 mmol per 1 g of 3PtY; 3PtY3Cl1C0.5 and 3PtY3Cl1C10, respectively).
| Catalysts | Pt loading* /wt.-% | Reducing agent | T /K | XLA /% | YGVL /% | SGVL /% |
|---|---|---|---|---|---|---|
| Y | n.d. | FA | 493 | n.d. | 13 | n.d. |
| 3PtY | 2.7 | FA | 493 | 42 | 34 | 80 |
| H2 | 493 | 100 | 92 | 92 | ||
| H2 | 393 | 95 | 69 | 73 | ||
| 3PtY3Cl18C0.5 | 2.5 | FA | 493 | 42 | 22 | 52 |
| H2 | 493 | 97 | 79 | 81 | ||
| H2 | 393 | 60 | 36 | 60 | ||
| 3PtY3Cl1C10 | 2.4 | FA | 493 | 38 | 12 | 32 |
Reaction conditions: reducing agent H2 (2.5 MPa) or FA (0.6 M), Vsolution = 125 cm3, cLA = 0.2 M, mcatalyst = 0.5 g, n = 700 min−1, 24 h, n.d., not determined,
*
via ICP-OES.