DME Synthesis over MSU-S Catalyst through Methanol Dehydration Reaction

• Published in: Iranian journal of oil & gas science and technology (Online) Vol. 2; no. 4; pp. 67 - 73
• Main Authors: Hamed Rashidi, Touba Hamoule, Mohammad Reza Khosravi Nikou, Ahmad Shariati
• Format: Journal Article
• Language: English
• Published: Petroleum University of Technology 01.10.2013
• Subjects: DME Synthesis; Mesoporous Material; MSU-S
• ISSN: 2345-2412; 2345-2420
• DOI: 10.22050/ijogst.2013.4797

MSU-S mesoporous catalyst with [SiO2]/[Al2O3] ratio of 55 was synthesized using tetrapropylammonium hydroxide (TPAOH) as a structure directing agent and hexadecyltrimethylammonium bromide (CTAB) as a surfactant. The catalytic activity of the calcined sample was evaluated for the dehydration of methanol to dimethyl ether (DME) in a vertical fixed bed microreactor at a weight hurly space velocity (WHSV) of 5 hr-1 .Temperature ranged from 230 °C to 380 °C and pressure was kept constant at 1 bar. The catalyst was characterized by XRD; consequently, the mesoporous structure of MSU-S catalyst was verified. The activity, selectivity, and stability of MSU-S catalyst were investigated in a vertical fixed bed reactor. An increase in methanol conversion was observed by increasing temperature. The equilibrium conversion of methanol was almost reached at 380 °C and selectivity decreased from 100% to 97% as temperature rose from 200 °C to 380 °C. The stability of MSU-S (Michigan State University) catalyst was investigated for 12 hr at 380 °C and a stable methanol conversion was observed during the mentioned time.