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  • Discovery of optimal zeolites for challenging separations and chemical transformations using predictive materials modeling.

Discovery of optimal zeolites for challenging separations and chemical transformations using predictive materials modeling.

Nature communications (2015-01-22)
Peng Bai, Mi Young Jeon, Limin Ren, Chris Knight, Michael W Deem, Michael Tsapatsis, J Ilja Siepmann
ABSTRACT

Zeolites play numerous important roles in modern petroleum refineries and have the potential to advance the production of fuels and chemical feedstocks from renewable resources. The performance of a zeolite as separation medium and catalyst depends on its framework structure. To date, 213 framework types have been synthesized and >330,000 thermodynamically accessible zeolite structures have been predicted. Hence, identification of optimal zeolites for a given application from the large pool of candidate structures is attractive for accelerating the pace of materials discovery. Here we identify, through a large-scale, multi-step computational screening process, promising zeolite structures for two energy-related applications: the purification of ethanol from fermentation broths and the hydroisomerization of alkanes with 18-30 carbon atoms encountered in petroleum refining. These results demonstrate that predictive modelling and data-driven science can now be applied to solve some of the most challenging separation problems involving highly non-ideal mixtures and highly articulated compounds.

MATERIALI
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Descrizione del prodotto

Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, for molecular biology
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, ACS reagent, ≥99.5%
Sigma-Aldrich
Glicerolo, ACS reagent, ≥99.5%
Sigma-Aldrich
Glicerolo, for molecular biology, ≥99.0%
Sigma-Aldrich
Glicerolo, ReagentPlus®, ≥99.0% (GC)
Sigma-Aldrich
Piridina, ACS reagent, ≥99.0%
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, meets USP testing specifications
Sigma-Aldrich
Hydrofluoric acid, ACS reagent, 48%
Sigma-Aldrich
Piridina, suitable for HPLC, ≥99.9%
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Ammonium fluoride, ACS reagent, ≥98.0%
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Etanolo, BioUltra, for molecular biology, ≥99.8%, (absolute alcohol, without additive, A15 o1)
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Etanolo, ACS reagent, prima fine spirit, without additive, F15 o1
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Piridina, ReagentPlus®, ≥99%
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Hydrofluoric acid, 48 wt. % in H2O, ≥99.99% trace metals basis
Sigma-Aldrich
Piridina, anhydrous, 99.8%
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Etanolo, purum, absolute ethanol, denaturated with 4.8% isopropanol, A15 IPA1, ≥99.8% (based on denaturant-free substance)
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Glicerolo, 83.5-89.5% (T)
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Glicerolo, ≥99.5%
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Glicerolo, BioReagent, suitable for cell culture, suitable for insect cell culture, suitable for electrophoresis, ≥99% (GC)
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Glicerolo, puriss., anhydrous, 99.0-101.0% (alkalimetric)
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Glicerolo, BioUltra, for molecular biology, anhydrous, ≥99.5% (GC)
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Ammonium fluoride, ≥99.99% trace metals basis
USP
Glicerina, United States Pharmacopeia (USP) Reference Standard
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Hydrogen fluoride pyridine, pyridine ~30 %, hydrogen fluoride ~70 %
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Glicerolo, FCC, FG
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Ethyl alcohol, Pure, 190 proof, ACS spectrophotometric grade, 95.0%
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Glicerolo, puriss. p.a., ACS reagent, anhydrous, dist., ≥99.5% (GC)
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Propylamine, ≥99%
Supelco
Glicerolo, Pharmaceutical Secondary Standard; Certified Reference Material
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Etanolo, purum, fine spirit, denaturated with 4.8% methanol, F25 METHYL1, ~96% (based on denaturant-free substance)