Hollow alumina nanospheres as novel catalyst for the conversion of methanol to dimethyl ether
محل انتشار: نشریه علوم و فناوری ذرات، دوره: 2، شماره: 1
سال انتشار: 1395
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 385
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شناسه ملی سند علمی:
JR_JPST-2-1_002
تاریخ نمایه سازی: 26 فروردین 1397
چکیده مقاله:
This paper investigates hollow and porous alumina nanospheres that were previously synthesized to be used for the dehydration of methanol to dimethyl ether (DME). As hollow nanostructures possess characteristics such as low density and high surface to volume ratio, their catalytic activity between hollow and porous structure is compared. For this purpose, three most important parameters (acidity, temperature and weight hourly space velocity (WHSV)) affecting the performance of these catalysts were investigated. The catalysts were characterized by scanning electron microscopy (SEM), BET, X-ray diffraction (XRD), and the temperature programmed desorption of ammonia (NH3-TPD) techniques. Results show that the optimum operating condition for hollow alumina nanosphere can be achieved at temperature of 275 ºC and WHSV of 20 h-1 compared with operating condition for porous alumina at temperature of 325 ºC and WHSV of 20 h-1.
کلیدواژه ها:
نویسندگان
N Rostamizadeh
Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, I. R. Iran
M.S Sadjadi
Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, I. R. Iran
S.A.A Sadjadi
Institute of Water and Energy, Sharif University of Technology, P.O. Box ۱۱۳۶۵-۸۶۳۹, Tehran, I. R. Iran