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Separating mixtures by exploiting molecular packing effects in microporous materials

Overview of attention for article published in Journal of the Chemical Society, Faraday Transactions, January 2015
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  • Good Attention Score compared to outputs of the same age (69th percentile)
  • Good Attention Score compared to outputs of the same age and source (77th percentile)

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Title
Separating mixtures by exploiting molecular packing effects in microporous materials
Published in
Journal of the Chemical Society, Faraday Transactions, January 2015
DOI 10.1039/c4cp03939d
Pubmed ID
Authors

Rajamani Krishna

Abstract

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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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 42 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United Kingdom 1 2%
Mexico 1 2%
Unknown 40 95%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 15 36%
Researcher 9 21%
Student > Master 4 10%
Student > Doctoral Student 2 5%
Student > Bachelor 2 5%
Other 5 12%
Unknown 5 12%
Readers by discipline Count As %
Chemistry 20 48%
Chemical Engineering 6 14%
Engineering 6 14%
Materials Science 3 7%
Psychology 1 2%
Other 0 0%
Unknown 6 14%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 4. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 21 January 2020.
All research outputs
#8,261,756
of 25,373,627 outputs
Outputs from Journal of the Chemical Society, Faraday Transactions
#3,133
of 17,004 outputs
Outputs of similar age
#105,032
of 359,515 outputs
Outputs of similar age from Journal of the Chemical Society, Faraday Transactions
#166
of 785 outputs
Altmetric has tracked 25,373,627 research outputs across all sources so far. This one has received more attention than most of these and is in the 66th percentile.
So far Altmetric has tracked 17,004 research outputs from this source. They receive a mean Attention Score of 2.5. This one has done well, scoring higher than 80% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 359,515 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 69% of its contemporaries.
We're also able to compare this research output to 785 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 77% of its contemporaries.