2018
DOI: 10.1021/acs.jpcc.8b08420
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Investigation of the Dynamics of 1-Octene Adsorption at 293 K in a ZSM-5 Catalyst by Inelastic and Quasielastic Neutron Scattering

Abstract: The properties of 1-octene adsorbed in zeolite ZSM-5 at 293 K are studied by means of inelastic and quasielastic neutron scattering (INS and QENS) in order to investigate interactions relevant to the zeolite solid acid catalysis of fluidised catalytic cracking reactions. The INS spectrum is compared to that recorded for the solid alkene and reveals significant changes of bonding on adsorption at ambient temperatures; the changes are attributed to the oligomerization of the adsorbed 1-octene to form a medium ch… Show more

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Cited by 15 publications
(26 citation statements)
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“…(3.1) The experimental EISF for n-octane is shown in figure 2, along with models for localized octane motion as outlined in our previous work [28]. These include the Volino and Dianoux model of diffusion confined to sphere, with a radius (rconf) matching that of a ZSM-5 channel, where the EISF is given by equation (3.2).…”
Section: Resultsmentioning
confidence: 99%
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“…(3.1) The experimental EISF for n-octane is shown in figure 2, along with models for localized octane motion as outlined in our previous work [28]. These include the Volino and Dianoux model of diffusion confined to sphere, with a radius (rconf) matching that of a ZSM-5 channel, where the EISF is given by equation (3.2).…”
Section: Resultsmentioning
confidence: 99%
“…where τ is the mean time between successive rotational jumps (m is the order of the quasi-elastic structure factor), and the HWHM value at low Q may be used to calculate the rotational diffusion constant Dr as 1/2τ as detailed in [29]. The Dr values are significantly higher (by about 30%) than those obtained for oligomerized 1-octene in H-ZSM-5 with a Si/Al = 30 [28]. This is not particularly surprising as the oligomerized chains (approx.…”
Section: A0(q)mentioning
confidence: 99%
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“…2) which provides full assignment of INS peaks. Thus, INS has shown the ability to access the olefin oligomerisation reactions [47][48][49]. The mechanism of oligomerisation of propene Reprinted from reference [23] with permission from Elsevier on HZSM-5 was clearly revealed by INS ( Fig.…”
Section: Olefin Oligomerisationmentioning
confidence: 94%
“…Several reviews have highlighted the advantages of neutron techniques in this regard, [25][26][27] and they have been successfully applied to the study of several zeolite-based catalytic systems. [28][29][30][31][32] In addition to the information on zeolite-hydrocarbon bonding interactions available through INS, neutron scattering offers the possibility of obtaining information on the diffusive motions of the hydrocarbons through the quasi-elastic neutron scattering (QENS) technique. QENS measures the scattering from atoms in motion and provides information on motions occurring acrossÅngstrom length scales and timescales from picoseconds to nanoseconds depending on instrumental design.…”
Section: Introductionmentioning
confidence: 99%