Fluoride-free synthesis of large-pore ITQ-27 aluminosilicate zeolite with a tunable composition and enhanced methanol-to-propylene performance

Key Points

• The aim is to develop a fluoride-free method for synthesizing ITQ-27 zeolite with adjustable Si/Al ratios and improved performance.
• Developed a phosphorus-containing OSDA for synthesis.
• Synthesized large-pore ITQ-27 aluminosilicate zeolite.
• Analyzed Si/Al ratios via rational design.
• Tested catalytic performance in the methanol-to-propylene reaction.
• Successfully synthesized ITQ-27 without fluoride.
• Tunable Si/Al ratios were achieved.
• Calcined ITQ-27 showed excellent catalytic performance in the MTP reaction.