Separation of ethane-ethylene and propane-propylene by Ag(I) doped and sulfurized microporous carbon

Saha, Dipendu; Toof, Brandon; Krishna, Rajamani; Orkoulas, Gerassimos; Gismondi, Pasquale; Thorpe, Ryan; Comroe, Marisa

doi:10.1016/j.micromeso.2020.110099

Cited by 42 publications

(18 citation statements)

References 43 publications

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“…To obtain a high quality and polymer grade olefins, the distillation must be operated at the extreme conditions of temperature and pressure. For cryogenic separation of ethane and ethylene, the distillation column must be maintained at the temperature and pressure of À25 C and 23 bars, respectively, whereas, for the propane/propylene separation, the distillation column should be maintained at the conditions of À30 C and 3 bar (Saha et al, 2020). The cryogenic distillation column also needs to be very tall, consisting of about 120-180 trays and operating at high reflux ratio.…”

Section: Current and State-of-the Art Separation And Its Drawbacksmentioning

confidence: 99%

“…The energy consumption of distillation separations arises from the need for phase changes in condensers/reboilers; the energy consumption increases with increasing reflux ratio (required when the relative volatilities are low, as for alkene/alkane mixtures) and when operating temperature is below ambient. Such a design requires a high energy input (Saha et al, 2020) of 7GJt À1 . The capital cost of installing cryogenic separation unit of ethylene is around twenty million dollars with the utility costs more than one million dollar every year (http://seperationtechnology.com/ separation-of-ethylene-from-ethane/ (accessed July 2021)).…”

Section: Current and State-of-the Art Separation And Its Drawbacksmentioning

confidence: 99%

“…The operation of a cryogenic distillation unit is highly energy intensive. It utilizes about 0.12 quads (1 Quad = 10 15 BTU) of energy annually in 1991 (Saha et al, 2020), which is equivalent to 0.3% of global energy usage and accounts for the annual energy consumption of a small country, like Singapore. In addition, the whole process of a cryogenic distillation is hazardous owing to the exposure of cryogenic temperature.…”

Section: Current and State-of-the Art Separation And Its Drawbacksmentioning

confidence: 99%

“…Because of the very similar physical and chemical properties of olefins/paraffins, it is very difficult to separate these molecules from one another. The kinetic diameters of ethane, ethylene, propane and propylene are very close (ethane: 4.443 A ˚; ethylene: 4.163 A ˚; propane: 4.3-5.118 A ˚and propylene: 4.678 A ˚) (Saha et al, 2020). However, sorbents with precise control over pore size/shape (kinetic separation or size exclusion or also known as beyond equilibrium) and topology can play a significant role in separating closely related molecules .…”

Section: Separation Of Olefins and Paraffins By Adsorptionmentioning

confidence: 99%

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Elucidating the mechanisms of Paraffin-Olefin separations using nanoporous adsorbents: An overview

Saha

Kim²,

Robinson³

et al. 2021

iScience

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Light olefins are the precursors of all modern-day plastics. Olefin is always mixed with paraffins in the time of production, and therefore it needs to be separated from paraffins to produce polymer-grade olefin. The state-of-the-art separation technique, cryogenic distillation, is highly expensive and hazardous. Adsorption could be a novel, sustainable, and inexpensive separation strategy, provided a suitable adsorbent can be designed. There are different types of mechanisms that were harnessed for the separation of olefins by adsorption, and in this review, we have focused our discussion on those mechanisms. These mechanisms include, (a) Affinity-based separation, like pi complexation and hydrogen bonding, (b) Separation based on pore size and shape, like size-exclusion and gate-opening effect, and (c) Non-equilibrium separation, like kinetic separation. In this review, we have elaborated each of the separation strategies from the fundamental level and explained their roles in the separation processes of different types of paraffins and olefins.

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Section: Current and State-of-the Art Separation And Its Drawbacksmentioning

confidence: 99%

Section: Current and State-of-the Art Separation And Its Drawbacksmentioning

confidence: 99%

Section: Current and State-of-the Art Separation And Its Drawbacksmentioning

confidence: 99%

Section: Separation Of Olefins and Paraffins By Adsorptionmentioning

confidence: 99%

See 2 more Smart Citations

Elucidating the mechanisms of Paraffin-Olefin separations using nanoporous adsorbents: An overview

Saha

Kim²,

Robinson³

et al. 2021

iScience

Self Cite

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“…In the past decades, membrane technology has become more popular in the separation of a vast number of mixtures in petrochemical-related industries and successfully competes with traditional methods. [1][2][3][4][5] Processes based on membrane for the most part do not require phase change to perform the separation (except for pervaporation). Because of some problems related to polymeric membranes selectivity and permeability, they are not suitable for all mixtures in industries.…”

Section: Introductionmentioning

confidence: 99%

Modeling Study of Propane/Propylene Membrane Separation Using CFD Method

Safaei

Zeynali

Safaei

2021

Macro Theory & Simulations

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debottleneck the permeability-selectivity and scale-up issues currently faced by polymeric and inorganic membranes, respectively. [6] Thus, low energy is required except if high energy should be applied to expand feed stream pressure for driving permeating component(s) on membrane films. [7,8] These procedures present a basically straightforward flow sheet. There are no perplexing control plans, no moving parts (aside from siphons or blowers), and minimal auxiliary gear contrasted with numerous different procedures. Accordingly, they can offer a simple, basic, and low support process choice [9-12] and could be fabricated with incredibly high selectivity for the parts to be isolated. By and large, these selectivity estimations are a lot greater than commonplace quality for relative unpredictability in refining tasks. Likewise, as a result of the way that an extremely enormous number of inorganic and polymeric materials can be used as membrane, there can be a lot of power over partition selectivity. Many researches have been done in mechanisms and materials of membranes for suggested new solutions, [13] preparation and characterization, green methods for preparation of paraffin and olefins; [14,15] new innovations are taking place in this area but there are some important challenges. [16,17] Membranes can recoup minor yet significant parts from a standard without considerable costs of energy. [18,19] Potentially, membrane processes are more environmentally friendly because these approaches use simple and nonharmful materials. In petrochemical industries, olefins such as ethylene and propylene are among the key materials used in producing polyolefin such as styrene, polypropylene, polyethylene, acrylonitrile, ethylene dichloride, isopropanol, and ethyl benzene. A key step in manufacturing olefins is their large-scale separation from corresponding paraffins. [20-22] Membrane gas separation has attracted many researchers owing to its low energy consumption and simplicity; however, it has the drawback of inverse relationship between permeability and selectivity. Nanocomposite membranes, where permeability and selectivity are simultaneously enhanced, can address this issue. To separate paraffin from olefin, different membranes are being used which, in order to solve problems with the materials used in the fabrication of these membranes such as zeolites, silicates, and carbon-based materials, application of mixed matrix membranes (MMMs) is preferred owing to their simple polymerization process which provides desirable selectivity and permeability in the separation of propene from propane. [23-27] Polymeric membranes, MMMs, and inorganic membranes Based on the wide applications of olefins in industries, especially in petrochemical industries which are among the major income sources, the separation of olefins from paraffin with membrane processes has been considered. Therefore, for the investigation of the performance of membrane processes, modeling can be used as a suitable and low-cost method to estimate and predict the ...

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Separation and Purification of Hydrocarbons with Porous Materials

Weckhuysen

2021

Angewandte Chemie

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is currently a postdoctoral researcher in Prof. Weckhuysen's group at Utrecht University. She received her PhD degree in Industrial Catalysis from the Dalian Institute of Chemical Physics, Chinese Academy of Sciences (2020) under the direction of Prof. Yunpeng Xu and Prof. Zhongmin Liu. Her current research interests include developing MOF thin films for ethene polymerization and gas adsorption. Bert M. Weckhuysen obtained his PhD degree from K. U. Leuven (Belgium) in 1995. After postdoctoral stays at Lehigh University (PA, USA) and Texas A&M University (TX, USA), he became full Professor at Utrecht University (The Netherlands) in 2000. His research focuses on the development and use of in situ and operando spectroscopy for studying solid catalysts under realistic reaction conditions at different length scales. Scheme 1. Timeline summarizing the trends in adsorptive hydrocarbon separation and purification with various porous materials over the latest three decades.

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Separation of ethane-ethylene and propane-propylene by Ag(I) doped and sulfurized microporous carbon

Cited by 42 publications

References 43 publications

Elucidating the mechanisms of Paraffin-Olefin separations using nanoporous adsorbents: An overview

Elucidating the mechanisms of Paraffin-Olefin separations using nanoporous adsorbents: An overview

Modeling Study of Propane/Propylene Membrane Separation Using CFD Method

Separation and Purification of Hydrocarbons with Porous Materials

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