Table 3. Intrinsic activation parameters for aqueous-phase dehydration of cyclohexanol.*.
Catalyst | ΔH°‡ (kJ mol−1) | ΔS°‡ (J mol−1 K−) | ΔG°‡443K (kJ mol−1) |
---|---|---|---|
MFI | 140±5 | 62±10 | 112±1 |
BEA | 159±4 | 87±9 | 120±1 |
FAU | 166±4 | 88±10 | 127±1 |
Soluble acids | 154±4 | 68±8 | 124±1 |
*Standard enthalpies, entropies and free energies of activation (at 443 K) on zeolites and homogeneous acids, derived from kinetic measurements and the transition state theory formalism. The error bars for ΔH°‡ and ΔS°‡ represent the 1−σ s.d.'s, while the error bar for ΔG°‡ represents the maximum error rounded up to the nearest integer (error analysis protocol detailed in Supplementary Methods).