Absorption Equilibrium and Kinetics for Ethylene−Ethane Separation with a Novel Solvent

Reine, Travis A.; Eldridge, R. Bruce

doi:10.1021/ie0488546

Cited by 49 publications

(39 citation statements)

References 10 publications

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“…These results indicate that Cu(I)Y-V has a high Cu(I) content than Cu(I)Y-A. 40,41 Great attention has been given to the separation of propylene/propane through adsorption, since this process can be carried out under mild conditions. 2.…”

Section: Resultsmentioning

confidence: 96%

Low-temperature fabrication of Cu(i) sites in zeolites by using a vapor-induced reduction strategy

et al. 2015

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Due to their versatility, nontoxicity, and low cost, Cu(I) ion exchanged zeolites are of great interest for various applications. Despite many attempts, the development of an efficient, controllable, and energysaving approach to fabricate Cu(I) sites in zeolites remains an open question. In this study, a strategy was developed to convert Cu(II) in zeolites to Cu(I) selectively using vapor-induced reduction (VIR) with methanol. The methanol vapors generated at elevated temperatures diffuse into the pores of zeolites and interact with Cu(II) ions, leading to the formation of Cu(I). This strategy allows the construction of Cu(I) sites at low temperatures and avoids the formation of Cu(0). Moreover, the obtained material exhibits excellent performance in the adsorptive separation of propylene/propane with regard to both capacity and selectivity, which is obviously superior to the material prepared by the conventional autoreduction method as well as using various typical adsorbents.

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Section: Resultsmentioning

confidence: 96%

Low-temperature fabrication of Cu(i) sites in zeolites by using a vapor-induced reduction strategy

et al. 2015

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“…Reine also performed kinetic studies on the CuCl, aniline, and DMF system. 3 These experiments indicated a 1:1 Cu(I) to ethylene ratio in the metal-olefin complexes and a first-order reaction, as shown in Eq. 1.…”

Section: Background and Theory Previous Work On Cucl-aniline-nmp Systemmentioning

confidence: 85%

“…1,3,4 A combination of CuCl, aniline, and N-methylpyrrolidone (NMP) exhibited optimal solution characteristics, including low cost, high ethylene capacity, low volatility, and high stability. However a lack of basic understanding regarding the structure of the Cu(I)-ethylene-aniline complex impedes the development of reactive absorption systems.…”

Section: Introductionmentioning

confidence: 99%

A study of Cu(I)‐ethylene complexation for olefin–paraffin separation

Chen¹,

Eldridge²,

Rosen³

et al. 2011

AIChE Journal

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The current cryogenic distillation technology used for olefin–paraffin separation incurs extensive capital and operating costs. An alternative olefin–paraffin separation process, based on reactive absorption, could yield significant cost reductions. The research efforts described herein explored the structural characteristics of an NMP‐CuCl‐aniline absorption solution with ethylene to aid future development of olefin–paraffin separation systems. Solution IR and 1H NMR spectroscopy suggested weak and labile Cu(I)‐ethylene and Cu(I)‐aniline coordination, which point to the coexistence of multiple structures in solution. Experiments also revealed solvent‐dependent and temperature‐dependent coordination. The agreement of the collected spectral data with literature implied single ethylene coordination, whereas the Cl− ion likely remained coordinated with Cu(I). Solvent interference prohibited detailed investigation of IR spectra, but 1H NMR spectroscopy showed more promise as an analytical technique for the NMP‐CuCl‐aniline‐ethylene system. Finally, a tradeoff appears to exist between ethylene capacity and complex stability, and thus, an optimal ligand must be found that balances these two competing needs. © 2010 American Institute of Chemical Engineers AIChE J, 2011

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“…Conventional olefin/paraffin separation technologies are based on cryogenic distillation process in columns with 150-200 trays operating at temperatures between 233 and 183 K and pressures ranging from 16 to 20 bar which lead to high capital investment, operational cost and also negative environmental impact [1][2][3]. Therefore, it is critical to develop innovative and cost-effective technologies able to separate these streams, overcoming the drawbacks associated to conventional systems.…”

Section: Introductionmentioning

confidence: 99%