fig8
Figure 8. In-situ FTIR spectra when gas-phase methanol was introduced to PLS-3-250 zeolite under the He or syngas flow at temperature of 623 K. Methanol was continuously brought into in-situ chamber under He flow for 10 min, and then under syngas flow for another 10 min. (A) Enlarge view of the region at 3,800-2,000 cm-1; (B) Enlarge view of the region at 1,800-1,400 cm-1. FTIR: Fourier transform infrared spectroscopy.
