Preparation and Characterization of PEBAX-5513/AgBF4/BMIMBF4 Membranes for Olefin/Paraffin Separation

Zeynali

Macro Theory & Simulations

2021

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 ...

Section: Introductionmentioning

confidence: 99%

Modeling Study of Propane/Propylene Membrane Separation Using CFD Method

Zeynali

Macro Theory & Simulations

2021

“…The majority of studies are concerned with the manufacturing and characterisation of membranes [20][21][22][23][24][25][26]. As a result of these works, it is pointed out that many properties, including the mechanical properties, of membranes, can be tailored by controlling the micro-nano structure of the materials [27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Manufacturing, Characterisation and Mechanical Analysis of Polyacrylonitrile Membranes

et al. 2020

To investigate the effect of polyvinylpyrrolidone (PVP) addition and consequently porosity, two different sets of membranes are manufactured, since PVP is a widely used poring agent which has an impact on the mechanical properties of the membrane material. The first set (PAN 1) includes polyacrylonitrile (PAN) and the necessary solvent while the second set (PAN 2) is made of PAN and PVP. These membranes are put through several characterisation processes including tensile testing. The obtained data are used to model the static behaviour of the membranes with different geometries but similar loading and boundary conditions that represent their operating conditions. This modelling process is undertaken by using the finite element method. The main idea is to investigate how geometry affects the load-carrying capacity of the membranes. Alongside membrane modelling, their materials are modelled with representative elements with hexagonal and rectangular pore arrays (RE) to understand the impact of porosity on the mechanical properties. Exploring the results, the best geometry is found as the elliptic membrane with the aspect ratio 4 and the better RE as the hexagonal array which can predict the elastic properties with an approximate error of 12%.

“…Majority of the studies are concerned in manufacturing and characterisation of membranes [20][21][22][23][24][25][26]. As a result of these works, it is pointed out that many properties, including the mechanical properties, of membranes, can be tailored by controlling the micro-nano structure of the materials [27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Manufacturing, Characterisation and Mechanical Analysis of PAN Membranes

Tüfekçi¹,

Durak²,

Pir³

et al. 2020

Preprint

To investigate the effect of Polyvinylpyrrolidone (PVP) addition and consequently porosity, two different sets of membranes are manufactured, since PVP is a widely used poring agent which has an impact on the mechanical properties of the membrane material. The first set (PAN 1) includes PAN and the necessary solvent while the second set (PAN 2) is made of PAN and PVP. These membranes are put through several characterisation processes including tensile testing. The obtained data are used to model the static behaviour of the membranes with different geometries, but similar loading and boundary conditions that represent their operating conditions. This modelling process is undertaken by using finite element method. The main idea is to investigate how geometry affects the load-carrying capacity of the membranes. Alongside membrane modelling, their materials are modelled with representative elements with hexagonal and rectangular pore arrays (RE) to understand the impact of porosity on the mechanical properties. Exploring the results, the best geometry is found as the elliptic membrane with the aspect ratio 4 and the better RE as the hexagonal array which can predict the elastic properties with an approximate error of 12%.