Fig. 2: Product comparation over various Ga contents.

a Yields of C₂H₄, C₃H₆, C₈H₁₀, CH₄, (b) H₂ production and (c) the real-time yields (C%) of HCHO in MTH reaction over parent HZSM-5 and various Ga(IM)HZSM-5. Reaction conditions of SR-PIMS experiments: 400 °C; MeOH WHSV = 12.52 g_MeOHg_catalyst⁻¹h⁻¹; and P = 2 Torr. C₃H₆ = propylene; and C₈H₁₀ = C₈ aromatics. The yields in (a) were obtained during the steady-state reaction period. The H₂ production of the catalyst samples in (b) was obtained under atmospheric pressure, which was carried out by GC‒MS. Each reaction in (c) proceeded until the C₂H₄ yield dropped to 0.5 C%. In (c), the original yield curves (transparent solid lines) have been smoothed as bright solid lines. Error bars obtained from repeated three sets of experiments on the same catalyst.