The effect of micro and nano particle sizes of H-ZSM-5 on the selectivity of MTP reaction

Firoozi, Mahtab; Baghalha, Morteza; Asadi, M.

doi:10.1016/j.catcom.2009.04.021

Cited by 206 publications

(121 citation statements)

References 16 publications

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“…In summary it was shown that when diffusion of reactants and products is facilitated by generating mesopores, coking is slowed down and lifetime increases. A similar result was obtained when small crystallites or nanosized particles of ZSM-5 have been used 9,10 .…”

Section: Introductionsupporting

confidence: 79%

Methanol to olefins: activity and stability of nanosized SAPO-34 molecular sieves and control of selectivity by silicon distribution

Martínez‐Triguero

Concepción

et al. 2013

Phys. Chem. Chem. Phys.

122

110

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Royal Society of ChemistryLi, Z.; Martínez Triguero, LJ.; Concepción Heydorn, P.; Yu, J.; Corma Canós, A. (2013 AbstractNanoSAPO-34 molecular sieve synthesized in microwave environment with 20nm of crystal size showed higher lifetime than SAPO-34 prepared by conventional hydrothermal method in the reaction of methanol to olefins. It has been found that silicon distribution strongly affects lifetime and selectivity. Thus, silicon at the border of the silicon islands gives higher lifetime and lower C2/C3 ratio. This change in activity and selectivity is better explained in terms of different silicon distribution than on preferential diffusion of ethene through the 8MR pores and agrees with transition-state selectivity. The effects of equilibrium of olefins and deactivation by coke were isolated,showing that after full formation of hydrocarbon pool, selectivity is independent of deactivation by coke.

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Section: Introductionsupporting

confidence: 79%

Methanol to olefins: activity and stability of nanosized SAPO-34 molecular sieves and control of selectivity by silicon distribution

Martínez‐Triguero

Concepción

et al. 2013

Phys. Chem. Chem. Phys.

122

110

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“…The patterns are 6 almost identical, as all the diffraction peaks obtained can be indexed to MFI-type structure 7 [55]. The high peak intensities and absence of the baseline drift in diffraction patterns of both 8 as-synthesized and commercial ZSM-5 zeolites indicate good crystallinity.…”

Section: Zeolite Morphology and Texturementioning

confidence: 77%

Direct dimethyl ether synthesis from syngas on copper–zeolite hybrid catalysts with a wide range of zeolite particle sizes

Cai

Palčić

Subramanian

et al. 2016

Journal of Catalysis

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“…In ZSM-5 there exists a remarkable molecular sieving effect for light hydrocarbons and this has been widely used as shape selective catalysts in various hydrocarbon processes; however, because the crystal sizes of ZSM-5 are usually much larger than the sizes of the micropores, the rate limiting step of the reaction tends to be the diffusion of the reactant/product molecules within the micropores [40,54,101]. Moreover, carbon solid (coke) readily forms near the external surface of the crystal under diffusion controlled conditions, thereby, rapidly plugging the pores, leading to a short catalyst lifetime.…”

Section: B Effect Of Crystal Sizementioning

confidence: 99%

Maximizing propylene production via FCC technology

2015

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This review looks at the main processes available for the production of light olefins with a focus on maximizing the production of propylene. Maximization of propylene production has become the focus of most refineries because it is in high demand and there is a supply shortage from modern steam crackers, which now produce relatively less propylene. The flexibility of the fluid catalytic cracking (FCC) to various reaction conditions makes it possible as one of the means to close the gap between supply and demand. The appropriate modification of the FCC process is accomplished by the synergistic integration of the catalyst, temperature, reaction-residence time, coke make, and hydrocarbon partial pressure. The main constraints for maximum propylene yield are based on having a suitable catalyst, suitable reactor configuration and reaction conditions.

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The effect of micro and nano particle sizes of H-ZSM-5 on the selectivity of MTP reaction

Cited by 206 publications

References 16 publications

Methanol to olefins: activity and stability of nanosized SAPO-34 molecular sieves and control of selectivity by silicon distribution

Methanol to olefins: activity and stability of nanosized SAPO-34 molecular sieves and control of selectivity by silicon distribution

Direct dimethyl ether synthesis from syngas on copper–zeolite hybrid catalysts with a wide range of zeolite particle sizes

Maximizing propylene production via FCC technology

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