Effects of catalyst particle size on methanol dehydration at different temperatures and weight hourly space velocities
Publish place: Journal of Particle Science & Technology، Vol: 2، Issue: 1
Publish Year: 1395
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JPST-2-1_005
تاریخ نمایه سازی: 26 فروردین 1397
Abstract:
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.
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Authors
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