Abstract
Samples of WO3 supported on γ-Al2O3 with loadings w(WO3) = 1–30 % were prepared by impregnation method and subjected to heat treatment at 500 and 550 °C for 3 h in a static air atmosphere. The catalysts were characterized by TG, DTA, XRD, TEM, TPD-pyridine, and N2 sorption measurements. The surface acidity of the catalysts was investigated by the dehydration of isopropanol and the adsorption of pyridine and 2,6-dimethylpyridine. Catalytic activity and selectivity of the catalysts were investigated for the dehydration of methanol to dimethyl ether at 230 °C in a conventional fixed bed flow type reactor at atmospheric pressure using nitrogen or air as a carrier gas. The results revealed that the catalysts with w(WO3) = 1–5 % loadings, calcined at 500 °C, exhibit a considerable increase in the catalytic performance toward methanol dehydration. The increase was, however, much more pronounced with the catalyst containing w(WO3) = 5 %, which attained dimethyl ether in 89 % yield.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
