Iranian Research Organization for Science and Technology Journal of Particle Science and Technology 2423-4087 2 1 2016 03 01 Effects of catalyst particle size on methanol dehydration at different temperatures and weight hourly space velocities 41 47 388 10.22104/jpst.2016.388 EN Leila Khoshrooyan Chemical Technologies Department, Iranian Research Organization for Science & Technology (IROST), Tehran, Iran Ali Eliassi Chemical Technologies Department, Iranian Research Organization for Science & Technology (IROST), Tehran, Iran Maryam Ranjbar Chemical Technologies Department, Iranian Research Organization for Science & Technology (IROST), Tehran, Iran 0000-0003-3445-613X Journal Article 2016 09 06 <br />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. https://jpst.irost.ir/article_388_d9fc5b73a8d78fad3d6dffe419384e70.pdf