Fig. 3: Product trend after reduction-oxidation treatment of Ga(IM)HZSM-5. | Communications Chemistry

Fig. 3: Product trend after reduction-oxidation treatment of Ga(IM)HZSM-5.

From: Role of formaldehyde in promoting aromatic selectivity during methanol conversion over gallium-modified zeolites

Fig. 3

The real-time yields (C%) of (a) HCHO, (b) C2H4, (c) propylene, and (d) C8 aromatics in MTH reaction over parent HZSM-5, Ga(IM-B)HZSM-5 and Ga(IM-B)HZSM-5(redox). e Is an enlarged view of the first 70 s in MTH over Ga(IM-B)HZSM-5(redox). Reaction conditions: 400 °C; MeOH WHSV = 12.52 gMeOHgcatalyst−1h−1; P = 2 Torr; each reaction proceeded until the C2H4 yield dropped to 0.5 C%. The solid line in (a) is the original yield curve. In (b–d), the original yield curves (transparent solid lines) have been smoothed as bright solid lines. The product yields in the gray dotted box of (e) were the first real-time yields of products obtained after methanol feeding.

Back to article page