000			01702nab a2200205 4500
005			20260520000819.0
008			260224s2009 xxu
245	0	0	_aInfluence of catalytic functionalities of zeolites on product selectivities in methanol conversion
260			_a _b _cfeb. 2009
270			_a15/05/2009 ; 29/04/2009
300			_a5 p. ; 593-598
520			_aTranscripción del resúmen publicado por el autor: In an attempt to understand the textural and acidic properties of zeolites on the methanol conversion and product selectivities, three zeolites, ferrierite, clinoptilolite, and SAPO-34, are studied. Temperature-programmed desorption of ammonia (NH3-TPD) indicated the presence of more weak acidity on ferrierite and clinoptilolite compared to the considerable strong acidity on SAPO-34. At 250 °C, all three samples exhibited comparable methanol conversions, but relatively lower dimethyl ether (DME) and higher light olefins are observed on SAPO-34. Ferrierite and clinoptilolite samples exhibited high selectivity for the formation of DME even at higher reaction temperatures (400 °C), while the product shifted from DME to light olefins with an increasing reaction temperature on SAPO-34. Especially, ferrierite, owing to its mild acidity and small pore size, is found to be a good catalyst for the methanol conversion to DME at 250 °C without significant deactivation for 100 h time on stream.
773	0		_tEnergy & fuels _g23
942			_cARTICULO
100	1		_aBaek, Seung-Chan _941046
100	1		_aLee, Yun-Jo _941047
100	1		_aJun, Ki-Won _941048
999			_c169663 _d169663
856			_uhttp://pubs.acs.org/doi/full/10.1021/ef800736n