Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 10 3 2014 09 01 Preparation of H-ZSM-5 Nano-Zeolite Using Mixed Template Method and its Activity Evaluation for ethanol to DME Reaction 171 180 9097 EN S. Abbasian Chemical Engineering Department, Babol University of Technology, Babol, I. R. Iran M. Taghizadeh Chemical Engineering Department, Babol University of Technology, Babol, I. R. Iran Journal Article 2014 04 04 H-ZSM-5 nano-zeolites were synthesized by hydrothermal method using tetrapropylammonium hydroxide (TPAOH) as a template in the presence of various TPABr concentrations. The effect of different TPABr/TPAOH molar ratios was studied on the catalytic performance of dehydration of methanol to dimethyl ether (DME) in a fixed bed reactor under the same operating conditions (T=300°C, P=1 atm, and WHSV=26 h−1). The prepared catalysts were characterized by XRD, SEM, BET and NH3-TPD. The characterization results showedthat the crystal sizes of the catalysts enlarge by increasing the concentration of TPABrin the synthesis reaction mixture. It was observed that H-form zeolite catalysts were active and selective for DME synthesis. These catalysts showed a high methanol conversion and also very high DME selectivity. It was found that by addition of up to 10 mole% TPABr in the synthesis reaction mixture, no significant effect was observed on the physical and chemical properties and catalytic activity of prepared catalysts. https://www.ijnnonline.net/article_9097_375abb16ea7c1f83be31ce4c3495ec41.pdf