A new carbon molecular sieve for propylene/propane separations

Liu, Junqiang; Liu, Yujun; Talay, Defne Kayrak; Calverley, Edward M.; Brayden, Mark; Martinez, Marcos

doi:10.1016/j.carbon.2014.12.089

Cited by 55 publications

(31 citation statements)

References 32 publications

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“…Specifically, four CMS candidates with suitable pore sizes and volumes were identified as promising adsorbents showing separation factors of 43 for C 3 H 6 /C 3 H 8 , 10 for C 2 H 4 /C 2 H 6 , 9 for N 2 /CH 4 , and 12 for CO 2 /N 2 gas mixtures. Liu et al also reported that the CMS derived from the cation exchanged resin Dowex‐X8 has a C 3 H 6 /C 3 H 8 separation factor of 27 according to the breakthrough experiment conducted at 90 °C and 6 atm . The propylene and propane diffusivities in the CMS are 1.0 × 10 −9 and 1.1 × 10 −11 cm 2 s −1 , respectively, at 100 kPa and 90 °C.…”

Section: Other Porous Materials For Adsorptive Light Olefin/paraffin mentioning

confidence: 99%

Alternatives to Cryogenic Distillation: Advanced Porous Materials in Adsorptive Light Olefin/Paraffin Separations

Wang

Peh

Zhao

2019

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209

139

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As primary feedstocks in the petrochemical industry, light olefins such as ethylene and propylene are mainly obtained from steam cracking of naphtha and short chain alkanes (ethane and propane). Due to their similar physical properties, the separations of olefins and paraffins—pivotal processes to meet the olefin purity requirement of downstream processing—are typically performed by highly energy‐intensive cryogenic distillation at low temperatures and high pressures. To reduce the energy input and save costs, adsorptive olefin/paraffin separations have been proposed as promising techniques to complement or even replace cryogenic distillation, and growing efforts have been devoted to developing advanced adsorbents to fulfill this challenging task. In this Review, a holistic view of olefin/paraffin separations is first provided by summarizing how different processes have been established to leverage the differences between olefins and paraffins for effective separations. Subsequently, recent advances in the development of porous materials for adsorptive olefin/paraffin separations are highlighted with an emphasis on different separation mechanisms. Last, a perspective on possible directions to push the limit of the research in this field is presented.

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Section: Other Porous Materials For Adsorptive Light Olefin/paraffin mentioning

confidence: 99%

Alternatives to Cryogenic Distillation: Advanced Porous Materials in Adsorptive Light Olefin/Paraffin Separations

Wang

Peh

Zhao

2019

Small

209

139

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“…1 Through the last years, process intensification by means of membrane technology has emerged as a promising alternative to large, expensive and energy-intensive distillation units. 2 Many membrane materials have been reported for olefin/paraffin separation, including polymers, [3][4][5] and more complex materials, such as carbon molecular sieves (CMSs), [6][7][8][9] zeolitic imidazolate frameworks (ZIFs), [10][11][12][13][14] or facilitated transport membranes. 15,16 Among these, facilitated transport membranes can easily surpass the permeabilityselectivity trade-off of polymeric membranes thanks to the reversible reaction between the olefin and a carrier cation, typically silver, which is added to the membrane composition.…”

Section: Introductionmentioning

confidence: 99%

Optimization of multistage olefin/paraffin membrane separation processes through rigorous modeling

et al. 2019

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In this work, we explore the capabilities of an NLP optimization model to determine the viability of facilitated transport membrane processes intended to replace traditional distillation currently employed for propane/propylene separation. An NLP optimization model for multistage membrane processes has been formulated, introducing the mathematical description of the facilitated transport mechanisms in the PVDF-HFP/BMImBF 4 /AgBF 4 membranes previously developed by our research group. For the first time, a simultaneous optimization of the process and the membrane material (i.e., carrier concentration) has been performed, thanks to the implementation of the governing equations for the fixed site and mobile carrier mechanisms. Once the model is solved in GAMS it returns the optimal membrane area, carrier loading and permeate pressure of each stage based on Net Present Value Cost (NPVC) minimization. Different process flow sheets were evaluated and the results show prominent reductions on NPVC for facilitated transport multistage processes when compared to distillation.

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“…In the literature, the studies on propylene adsorption and its behavior in porous materials are mainly performed in the context of the development of an alternative olefin separation technology in the petrochemical industry [39][40][41] . The current standard practice for the separation is a cryogenic distillation which is an energy intensive process 40 .…”

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confidence: 99%

Effect of porous structure of coal on propylene adsorption from gas mixtures

Wojtacha‐Rychter

Howaniec

Smoliński

2020

Sci Rep

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This paper addresses the issue of the sorption process on coal concerning propylene released from the source of coal heating in the deposit. In this study, the interaction between Polish coals and propylene molecules, as well as three other hydrocarbons (ethylene, ethane, and propane) with the application of a fixed-bed column, was investigated. The experimental results show that propylene adsorption was measurable under the experimental conditions. The differences in the amount of adsorbed propylene were predominately caused by various gas diffusion rates within the pore network associated with the molecular sieving effect. According to the experimental results, the influence of mesopores on propylene adsorption was significantly stronger than the share of micropores of the explored coals. The column tests demonstrated that the largest amount of propylene was adsorbed by coal with the highest value of pore diameter (6.48 nm) determined by nitrogen adsorption at 77 K. Under the experimental conditions, the influence of other hydrocarbons and a surface area on the quantity of the adsorbed gas was unnoticeable. This study provides an understanding of the behavior of some of the fire gases during the flow of the mixture through a heterogeneous structure of coal in the mine environment. The sorption of gases from multi-component mixture released during the selfheating of coal on carbon materials such as bituminous and lignite coals is poorly understood which provides the rationale for the topic of this work.

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A new carbon molecular sieve for propylene/propane separations

Cited by 55 publications

References 32 publications

Alternatives to Cryogenic Distillation: Advanced Porous Materials in Adsorptive Light Olefin/Paraffin Separations

Alternatives to Cryogenic Distillation: Advanced Porous Materials in Adsorptive Light Olefin/Paraffin Separations

Optimization of multistage olefin/paraffin membrane separation processes through rigorous modeling

Effect of porous structure of coal on propylene adsorption from gas mixtures

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