Synthesis of Ce La / HAPSO-34 Catalyst and Evaluation of its Performance in the Conversion Process of Methanol to Propylene

Document Type : Research Article

Author

Research Institute of Petroleum Industry, Tehran, I.R. IRAN

Abstract

In this study, the catalysts (HSAPO-34) were synthesized by the hydrothermal method using of n-poropyl amine as a meso structure-forming agent. Since the main problem of these catalysts is their short lifetime due to coke formation. Cokes are mainly aromatic and branched isomers, are formed inside the catalyst vacancies and is irreversibly absorbed into the acidic sites, thereby reducing the concentration of the catalytic acid sites. Therefore, using of various metals such as lanthanides as a modifier by creating new acidic sites improve the catalyst acidity and prolonged the catalyst lifetime. The combination of Ce and La metal salts was used to improve the acidity and prolonged the synthesized catalyst lifetime. The catalyst properties (Ce La / HSAPO-34) were determined by various methods such as XRD, FESEM, NH3-TPD and BET. Catalytic performance (Ce La / HSAPO-34) was studied in a fixed bed reactor in methanol to propylene conversion reaction. The catalytic test results showed methanol conversion above 90% and propylene selectivity (48.5%) and it took 8 hours for the catalyst to deactivation.

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References

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