Effects of catalyst particle size on methanol dehydration at different temperatures and weight hourly space velocities

  • سال انتشار: 1395
  • محل انتشار: فصلنامه علوم و فناوری ذرات، دوره: 2، شماره: 1
  • کد COI اختصاصی: JR_JPST-2-1_005
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 506
دانلود فایل این مقاله

نویسندگان

Leila Khoshrooyan

Chemical Technology Department, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran

Ali Eliassi

Chemical Technology Department, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran

Maryam Ranjbar

Chemical Technology Department, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran

چکیده

The effect of catalyst particle size on dehydration of methanol to dimethyl ether is investigated using fixed bed and micro-channel reactors at different temperatures and weight hourly space velocities. The experiments were carried out at 290 and 320oC. The space velocities were changed from 10 up to 90h-1 and from 1.22 to 3.65h-1 for fixed bed and micro-channel reactors, respectively. Considering the catalyst particle size effect on dehydration reaction, the particle size was changed from 0.063 to 1mm. Commercial gamma alumina was used as catalyst in all the experiments. The fabricated micro-channel reactor had 40 channels with 1mm diameter and 6 cm length.The channels were sub-coated with alumina and finally were coated with gamma alumina as dehydration catalyst. The results showed that methanol conversions were increased by increasing the temperature and decreasing the particle size of the catalyst. Furthermore, methanol conversion in micro-channel reactor was less than for fixed bed reactor under the similar WHSVs, due to the special geometrical shape of the micro-channels.

کلیدواژه ها

Methanol Dehydration,Fixed Bed Reactor,Micro-Channel Reactor,Catalyst Particle Size,DME,Gamma Alumina,

مقالات مرتبط جدید

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.