Ultrasonic and Microwave Pretreatment for Hydrothermal Synthesis of NanosizedSAPO-34s and their Catalytic Performance in MTO Reactio
محل انتشار: ماهنامه بین المللی مهندسی، دوره: 28، شماره: 3
سال انتشار: 1393
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 432
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شناسه ملی سند علمی:
JR_IJE-28-3_001
تاریخ نمایه سازی: 4 خرداد 1395
چکیده مقاله:
In order to enhance the catalytic performance of SAPO-34 catalyst for the reaction of methanol toolefins (MTO), ultrasonic and microwave-assisted aging method was employed in static hydrothermalmethod to synthesize nano-sized SAPO-34. The effects of the application of this method on thechemical composition, morphology, surface area and total acidity of SAPO-34 were investigated byXRD, FE-SEM, nitrogen adsorption–desorption and NH3-TPD techniques. The catalytic performanceof synthesized SAPO-34 was investigated for MTO reaction in a fixed-bed reactor under the sameoperating conditions (T = 450 °C, P = 1 atm, and WHSV = 4 h−1). Comparing with the SAPO-34synthesized with conventional hydrothermal method, the sample synthesized with simultaneous use ofUS and MW-assisted aging methods possessed larger surface area and small crystal size and exhibitedhigher selectivity to light olefins ( 2 4 )C = - C = and longer lifetime
نویسندگان
H. Sharifi Pajaie
Chemical Engineering Department, Babol University of Technology, Babol, Iran.
M Taghizadeh
Chemical Engineering Department, Babol University of Technology, Babol, Iran.