Efficient synthesis of dimethyl ether over HZSM-5 supported on medium-surface-area beta-SiC foam.
In this study, we aimed to produce a highly selective and stable catalyst for the production of dimethyl ether by methanol dehydration. The activities were compared of different active phases of the employed system, zeolite HZSM-5 or gamma-alumina, supported on silicon carbide as foam, and it was found that the supported zeolite catalysts are more active than and as selective as the alumina-based catalysts. The as-prepared zeolite/SiC composites reveal good stability in long-term tests in the presence or absence of steam. The high stability is attributed to the presence of highly dispersed micrometer-sized zeolite particles, which make the active sites more accessible to the reactants and promote the quick transfer of the desired product, dimethyl ether, out of the catalyst bed, minimizing deactivation of the catalyst.
Laboratoire des Matériaux Surfaces et Procédés pour la Catalyse, UMR 7515 du CNRS, Université Louis Pasteur, European Laboratory of Catalysis and Surface Sciences (ELCASS), 25 rue Becquerel, 67087 Strasbourg, France.
Svetlana
S
Ivanova
Estelle
E
Vanhaecke
Benoit
B
Louis
Suzanne
S
Libs
Marc-Jacques
MJ
Ledoux
Sévérine
S
Rigolet
Claire
C
Marichal
Charlotte
C
Pham
Francis
F
Luck
Cuong
C
Pham-Huu
D017554:Carbon Compounds, Inorganic / Q000737:chemistry*; D002384:Catalysis; D003681:Dehydration; D009682:Magnetic Resonance Spectroscopy; D000432:Methanol / Q000737:chemistry; D008738:Methyl Ethers / Q000138:chemical synthesis* / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D016062:Porosity; D017655:Silicon Compounds / Q000737:chemistry*; D013499:Surface Properties; D055682:Viscoelastic Substances / Q000737:chemistry*; D014961:X-Ray Diffraction; D017641:Zeolites / Q000737:chemistry*
D017554:Carbon Compounds, Inorganic; D008738:Methyl Ethers; D017655:Silicon Compounds; D055682:Viscoelastic Substances; D017641:Zeolites; C033413:dimethyl ether; C022088:silicon carbide; D000432:Methanol