Selective production of light olefins from methanol over desilicated highly siliceous ZSM-5 nanocatalysts
Publish place: Polyolefins Journal، Vol: 5، Issue: 1
Publish Year: 1396
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_POJ-5-1_006
تاریخ نمایه سازی: 15 اردیبهشت 1397
Abstract:
Highly siliceous ZSM-5 nanocatalysts can dehydrate methanol to a wide range of hydrocarbons. In this study, the development of hierarchical H-ZSM-5 nanocatalysts (Si/Al=200) were reported for the methanol-toolefins (MTO) reaction. The nanocatalysts were prepared through a hydrothermal technique and treated by NaOH desilication. The parent and desilicated nanocatalysts were characterized using FE-SEM, XRD, FTIR, NH3-TPD and N2 adsorption-desorption techniques. The mesoporosity increased five times without significant collapse of the crystalline framework as a result of the appropriate desilication of H-ZSM-5 nanocatalyst. For the nanocatalyst, a high surface area of 189.5 m2 g-1, mesopore volume of 0.35 cm3 g-1 and well-adjusted strong acidity of 0.16 mmol NH3 g-1 resulted in a high methanol conversion of 100%, high propylene selectivity of 43% and low light paraffins selectivity of <8% in the MTO reaction. A broad mesopore size of 2-10 nm suppressed coke deposition and provided a long catalytic life time of 75 h. The developed high silica nanocatalyst showed a high potential for industrial applications due to its stable performance. Polyolefins J (2017) 5: 59-70
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Authors
Mohammad Rostamizadeh
Department of Chemical Engineering, Sahand University of Technology, Sahand New Town, Tabriz, Iran ,Environmental Engineering Research Center, Sahand University of Technology, Sahand New Town, Tabriz, Iran
Fereydoon Yaripour
Catalysis Research Group, Petrochemical Research & Technology Company, National Iranian Petrochemical Company, Tehran, Iran
Hossein Hazrati
Department of Chemical Engineering, Sahand University of Technology, Sahand New Town, Tabriz, Iran ,Environmental Engineering Research Center, Sahand University of Technology, Sahand New Town, Tabriz, Iran