Catalyst Equilibration for Transformation of Methanol into Hydrocarbons by Reaction−Regeneration Cycles

Benito, Pedro L.; Aguayo, Andrés T.; Gayubo, and Ana G.; Bilbao, Javier

doi:10.1021/ie950493u

Cited by 78 publications

(67 citation statements)

References 15 publications

(14 reference statements)

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“…Thus, the catalyst particles have been obtained by wet extrusion method and dried in an oven at 110 • C for 24 h; then they have been calcined at 575 • C for 2 h following a temperature ramp of 5 • C·min −1 and sieved to a particle diameter between 0.125 and 0.3 mm. This calcination temperature assures the hydrothermal stability of the acid sites that is required for operating in reaction-regeneration cycles (with regeneration by coke combustion with air at 550 • C), with full recovery of the kinetic performance [54]. Additionally, this agglomeration confers a suitable particle size for its use in the reactor.…”

Section: Catalysis Preparationmentioning

confidence: 99%

Nature and Location of Carbonaceous Species in a Composite HZSM-5 Zeolite Catalyst during the Conversion of Dimethyl Ether into Light Olefins

et al. 2017

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Abstract:The deactivation of a composite catalyst based on HZSM-5 zeolite (agglomerated in a matrix using boehmite as a binder) has been studied during the transformation of dimethyl ether into light olefins. The location of the trapped/retained species (on the zeolite or on the matrix) has been analyzed by comparing the properties of the fresh and deactivated catalyst after runs at different temperatures, while the nature of those species has been studied using different spectroscopic and thermogravimetric techniques. The reaction occurs on the strongest acid sites of the zeolite micropores through olefins and alkyl-benzenes as intermediates. These species also condensate into bulkier structures (polyaromatics named as coke), particularly at higher temperatures and within the mesoand macropores of the matrix. The critical roles of the matrix and water in the reaction medium have been proved: both attenuating the effect of coke deposition.

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Section: Catalysis Preparationmentioning

confidence: 99%

Nature and Location of Carbonaceous Species in a Composite HZSM-5 Zeolite Catalyst during the Conversion of Dimethyl Ether into Light Olefins

et al. 2017

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“…In a final step, the catalyst is calcined at 575 8C in order to confer stability for regeneration processes [40].…”

Section: Catalystsmentioning

confidence: 99%

Catalytic pyrolysis of HDPE in continuous mode over zeolite catalysts in a conical spouted bed reactor

Elordi

Olazar

López

et al. 2009

Journal of Analytical and Applied Pyrolysis

200

101

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“…The resulting catalyst has been proven to be hydrothermally stable for the MTG (methanol-to-gasoline) process carried out following reaction-regeneration cycles. 24 The physical properties of the catalyst, determined by N 2 adsorption-desorption in a Micromeritics (Norcross, GA, USA) Figure 1 shows the results of TPD (temperatureprogrammed desorption) of NH 3 for the fresh catalyst. These results have been obtained in an SDT 2960 thermobalance (TA Instruments, New Castle, DE, USA) connected online to a Thermostar mass spectrometer (Balzers Instruments, Asslar, Germany).…”

Section: Experimental Catalystmentioning

confidence: 99%

Undesired components in the transformation of biomass pyrolysis oil into hydrocarbons on an HZSM‐5 zeolite catalyst

Gayubo¹,

Aguayo²,

Atutxa³

et al. 2005

J of Chemical Tech & Biotech

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147

100

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Abstract:The results of the catalytic transformation on HZSM-5 zeolite of mixtures of components of biomass pyrolysis oil in the 673-723 K temperature range are evidence of the need for previously separating certain components (aldehydes, oxyphenols and furfural) that undergo severe thermal degradation by forming carbonaceous deposits at the reactor inlet ducts and on the catalyst itself. The deactivation of the catalyst is a consequence of the deposition of two different types of coke: one of catalytic origin (similar to that generated in the transformation of methanol and bioethanol) and the other of thermal origin, which is produced by the aforementioned degradation. The remaining oxygenate components react to each other with synergistic effect, which means that their reactivity is higher than that of the pure components. The results show that the aqueous fraction of biomass pyrolysis oil may be transformed into hydrocarbons on acid catalysts similarly to the more familiar transformation of methanol and bioethanol.

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Catalyst Equilibration for Transformation of Methanol into Hydrocarbons by Reaction−Regeneration Cycles

Cited by 78 publications

References 15 publications

Nature and Location of Carbonaceous Species in a Composite HZSM-5 Zeolite Catalyst during the Conversion of Dimethyl Ether into Light Olefins

Nature and Location of Carbonaceous Species in a Composite HZSM-5 Zeolite Catalyst during the Conversion of Dimethyl Ether into Light Olefins

Catalytic pyrolysis of HDPE in continuous mode over zeolite catalysts in a conical spouted bed reactor

Undesired components in the transformation of biomass pyrolysis oil into hydrocarbons on an HZSM‐5 zeolite catalyst

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