Liquid phase separation of 1-butene from 2-butenes on all-silica zeolite RUB-41

Tijsebaert, Bart; Varszegi, Csaba; Gies, Hermann; Xiao, Feng‐Shou; Bao, Xinhe; Tatsumi, Takashi; Müller, Ulrich; Vos, Dirk De

doi:10.1039/b719463c

Cited by 48 publications

(63 citation statements)

References 7 publications

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“…The behavior of RUB-41 likely stems from the unique pore architecture of the RRO topology, where pore distortion leads to a pronounced selectivity. This finding demonstrates the potential of utilizing RUB-41 for a commercially attractive direct liquid-phase separation process to isolate pure 1-butene from a butene mixture [22]. It was also shown that insertion of functional T-atoms into the silicate framework is possible, which makes this zeolite attractive for many applications in catalysis.…”

Section: Strategies In the Search For Novel Zeolitesmentioning

confidence: 77%

“…Adsorption studies using small hydrocarbons showed stronger adsorption of alkenes compared to alkanes [20]. Liquid phase separation experiments on RUB-41 resulted in unusual trends of preferential adsorption, where uptake of trans-2-butene (critical diameter = 0.431 nm) and cis-2-butene (critical diameter = 0.494 nm) was favored over 1-butene (critical diameter = 0.446 nm) [22]. Typically, in small pore zeolites the order of preference follows the order of critical diameter, hence the trans-2-butene is favored over 1-butene and cis-2-butene [22].…”

Section: Strategies In the Search For Novel Zeolitesmentioning

confidence: 99%

“…Liquid phase separation experiments on RUB-41 resulted in unusual trends of preferential adsorption, where uptake of trans-2-butene (critical diameter = 0.431 nm) and cis-2-butene (critical diameter = 0.494 nm) was favored over 1-butene (critical diameter = 0.446 nm) [22]. Typically, in small pore zeolites the order of preference follows the order of critical diameter, hence the trans-2-butene is favored over 1-butene and cis-2-butene [22]. The behavior of RUB-41 likely stems from the unique pore architecture of the RRO topology, where pore distortion leads to a pronounced selectivity.…”

Section: Strategies In the Search For Novel Zeolitesmentioning

confidence: 99%

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Catalytic Applications of Zeolites in Chemical Industry

2009

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New materials are prerequisite for major breakthrough applications influencing our daily life, and therefore are pivotal for the chemical industry. Nanoporous materials constitute an important class of heterogeneous catalysts as they not only offer higher surface areas and enhanced activity, but also provide shape/size selectivity. As a well-established family of nanoporous materials, zeolites are of paramount importance for the chemical industry as heterogeneous catalysts with shape/size-selective character in various reactions. Zeolites can also play an active role in the quest for raw material change as catalysts providing the required selectivity towards base chemicals. In this contribution, an overview of the current and potential applications of zeolites as catalysts in chemical industry is presented.

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Section: Strategies In the Search For Novel Zeolitesmentioning

confidence: 77%

Section: Strategies In the Search For Novel Zeolitesmentioning

confidence: 99%

Section: Strategies In the Search For Novel Zeolitesmentioning

confidence: 99%

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Catalytic Applications of Zeolites in Chemical Industry

2009

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“…67,70 A further point to stress is that nC4/iC4 separations using MFI in both fixed bed adsorbers and membrane devices benefit from the synergy between adsorption and diffusion; both of these act in favor of the linear isomer. This has been established in the MAS PFG NMR experiments of Fernandez et al 71 and the transient uptake data of Chmelik et al 72 Tijsebaert et al 73 have demonstrated the potential of RUB-41, which has the RRO zeolite structural topology, for separation of cis-2-butene and trans-2-butene from 1-butene; this separation is of industrial importance because 1-butene is needed in the production of e.g. linear low density polyethylene (LLDPE).…”

Section: Separation Of C4 Hydrocarbonsmentioning

confidence: 99%

Separating mixtures by exploiting molecular packing effects in microporous materials

Krishna

2015

Phys. Chem. Chem. Phys.

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We examine mixture separations with microporous adsorbents such as zeolites, metal-organic frameworks (MOFs) and zeolitic imidazolate frameworks (ZIFs), operating under conditions close to pore saturation. Pore saturation is realized, for example, when separating bulk liquid phase mixtures of polar compounds such as water, alcohols and ketones. For the operating conditions used in industrial practice, pore saturation is also attained in separations of hydrocarbon mixtures such as xylene isomers and hexane isomers. Separations under pore saturation conditions are strongly influenced by differences in the saturation capacities of the constituent species; the adsorption is often in favor of the component with the higher saturation capacity.Effective separations are achieved by exploiting differences in the efficiency with which molecules pack within the ordered crystalline porous materials. For mixtures of chain alcohols, the shorter alcohol can be preferentially adsorbed because of its higher saturation capacity. With hydrophilic adsorbents, water can be selectively adsorbed from water-alcohol mixtures. For separations of o-xylene-m-xylene-p-xylene mixtures, the pore dimensions of MOFs can be tailored in such a manner as to allow optimal packing of the isomer that needs to be adsorbed preferentially. Subtle configurational differences between linear and branched alkane isomers result in significantly different packing efficiencies within the pore topology of MFI, AFI, ATS, and CFI zeolites. A common characteristic feature of most separations that are reliant on molecular packing effects is that adsorption and intra-crystalline diffusion are synergistic; this enhances the separation efficiencies in fixed bed adsorbers.

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“…However, because of the all-silica compositions of the layered precursors, the new zeolite frameworks as condensation products were primarily obtained in their all silica form [1,[3][4][5]. These electro-neutral frameworks are chemically and thermally very stable, and -due to their hydrophobicity -they show specific sorption properties [6]. However, in order to introduce active centers for utilization in catalytic reactions, Si must be substituted by other, tetrahedrally coordinated T-atoms such as e.g.…”

Section: Introductionmentioning

confidence: 99%