Propane/Propylene Separation by Simulated Moving Bed I. Adsorption of Propane, Propylene and Isobutane in Pellets of 13X Zeolite

Lamia, Nabil; Wolff, Luc; Leflaive, P.; Gomes, Pedro Sá; Grande, Carlos A.; Rodrigues, Alı́rio E.

doi:10.1080/01496390701515219

Cited by 50 publications

(47 citation statements)

References 22 publications

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“…However, the isotherms from all three studies are close to each other and hence all are retained. As may be observed from Figure S6a, iso butane isotherms from Hyun and Danner (1982) and Lamia et al (2007) are leveling off a bit earlier than those from Barrer and Sutherland (1956).…”

Section: Resultscontrasting

confidence: 44%

“…Isotherms from the other three studies in general are consistent in shape and position with some exceptions. Data from Hyun and Danner (1982) and Lamia et al (2007) are similar in both low and high pressure ranges, but the Barrer and Sutherland (1956) isotherms are slightly higher. Iso butane data at a T r of 0.79 from Hyun and Danner is lying between isotherms at a T r of 0.87 and 0.82 from Lamia et al (2007) which suggest a slight position inconsistency.…”

Section: Resultsmentioning

confidence: 63%

“…Data are collected from seven different studies. These are for Barrer and Sutherland (1956), Campo et al (2013), Da Silva and Rodrigues (1999), Lamia et al (2007), van Miltenburg et al (2008), Loughlin et al (1990) and Narin et al (2014). The shape of the Campo et al (2013) isotherms appears to be inconsistent and so these isotherms are deleted.…”

Section: Resultsmentioning

confidence: 95%

“…It should be noted that all these isotherms tend to be in the saturation region, so that no data exists for the Henry Law region. The iso butane data are from four different studies, Hyun and Danner (1982), Lamia et al (2007), Campo et al (2014) and Barrer and Sutherland (1956). Figure S6a shows the isotherms for branched butane ranging from a T r of 0.73 to 1.04.…”

Section: Resultsmentioning

confidence: 99%

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Saturation loadings on 13X (faujasite) zeolite above and below the critical conditions. Part I: alkane data evaluation and modeling

Mousa¹,

Abouelnasr

Loughlin

2015

Adsorption

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The saturation loadings for subcritical adsorption of n-, iso-and neo alkanes C 1 -C 8 in 13X zeolite are modeled using the modified Rackett model of Spencer and Danner (J Chem Eng Data 17:236-240, 1972) for the saturated liquid densities combined with crystallographic data for the 13X zeolite. For validation of this model, alkane adsorption data in the literature is first critically evaluated and then compared to the model. The saturation loading of each isotherm that approaches saturation is extracted from the data. Log-log plots are used to determine whether each isotherm is near saturation; isotherms that exhibit a ðo ln qÞ ð = o ln pÞ slope of zero at their maximum pressure point are assumed to be saturated. Isotherms not fulfilling this criterion are deemed unsaturated and not considered further. The theoretical equation satisfactorily models the available experimental data for the n-alkanes. However, steric factors are required for the model to fit iso alkanes and neo-pentane. For supercritical temperatures, no model presently exists to explain the data. However, the data are satisfactorily modeled with an equation of the form q max = 8.5 ± 2.5 g/100 g.

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Section: Resultscontrasting

confidence: 44%

Section: Resultsmentioning

confidence: 63%

Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

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Saturation loadings on 13X (faujasite) zeolite above and below the critical conditions. Part I: alkane data evaluation and modeling

Mousa¹,

Abouelnasr

Loughlin

2015

Adsorption

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“…The high energy requirements and the increasing demand have been the driving forces to develop new technologies and/or materials which must be cheaper, yet environmentally friendly. Among the competing alternatives towards this end, cyclic adsorption processes such as vacuum pressure swing adsorption (VPSA) [16][17][18][19][20] and simulated moving bed (SMB) [21][22][23] technologies appears to be the most promising and energy-efficient options.…”

Section: Introductionmentioning

confidence: 99%

Development of gas‐phase SMB technology for light olefin/paraffin separations

et al. 2016

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The separation of ethylene from ethane is particularly complex due to their similar physical properties. Cryogenic distillation is the most common technology employed for this separation and is one of the most expensive operations in industry, being the driving force for the ongoing research to find a more cost-effective alternative. In the present work, a gas-phase simulated moving bed (SMB) bench unit was employed to produce polymer-grade ethylene from ethane/ethylene mixtures, using binderless 13X zeolite beads as adsorbent, and propane as desorbent. The achieved performance parameters demonstrated the high efficiency of the current technology, since ethylene was obtained with a purity of 99.8%, a recovery of 99.8%, and a productivity of 59.7 kg C2H4 Áh 21 Ám 23 adsorbent . Considering the encouraging results obtained it is fair to say that the gas-phase SMB is a competitive and strong candidate as alternative to the conventional process, especially when combined with enhanced performance adsorbents, such as binderless zeolites.

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A performance indicator for the screening of adsorbent/desorbent pairs for gas‐phase simulated moving bed applications

et al. 2023

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In a simulated moving bed, the regeneration is accomplished by the introduction of a third species, the desorbent, which is later recovered by two downstream separations. As such, the choice of a proper adsorbent/desorbent pair is critical to ensure the effectiveness of the SMB process. While this can be done by comparing the separation region for each system, the computational effort required is extremely high. By developing a parameter that uses readily available literature data, the selection process is sped up and can be easily accomplished. In this work, an SMB performance indicator (SPI) is suggested. This indicator involves the trade-off between the adsorption selectivity in the presence of the desorbent, the adsorption capacity of the most retained species, and the ratio of the most and less retained species' enthalpies. The developed metric can select the most suitable adsorbent/pair for a specific gas separation by SMB through simple calculations.

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Propane/Propylene Separation by Simulated Moving Bed I. Adsorption of Propane, Propylene and Isobutane in Pellets of 13X Zeolite

Cited by 50 publications

References 22 publications

Saturation loadings on 13X (faujasite) zeolite above and below the critical conditions. Part I: alkane data evaluation and modeling

Saturation loadings on 13X (faujasite) zeolite above and below the critical conditions. Part I: alkane data evaluation and modeling

Development of gas‐phase SMB technology for light olefin/paraffin separations

A performance indicator for the screening of adsorbent/desorbent pairs for gas‐phase simulated moving bed applications

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