6/2/2023 0 Comments Go64 reviewsSince the field is advancing fast, this review will focus on the most recent progress (from the last 5 years), in order to provide the most up-to-date overview in this area. Interestingly, these copolymers show a high versatility in the incorporation of nanofillers, as proved by the large number of papers describing nanocomposite membranes based on Pebax for the separation of CO2. For this purpose, Pebax copolymers are being actively studied by virtue of a macromolecular structure that comprises specific groups that are capable of interacting with CO2, facilitating its transport with respect to other gas species. In the global strategy of containing the greenhouse effect by pursuing a model of sustainable growth, separations involving CO2 are some of the most pressing topics due to their implications in flue gas emission and natural gas upgrading. Nanocomposites, as mixed-matrix membranes, represent a practicable response to this strongly felt need, since they combine the superior properties of inorganic fillers with the easy handling of the polymers. Moreover, the application of nanotubes and nanoparticles can be a promising option in future research.Īn inspiring challenge for membrane scientists is to exceed the current materials’ performance while keeping the intrinsic processability of the polymers. Again, by using content analysis techniques, chemical fixation, cycloaddition, cyclic carbonates, epoxides and mixed-matrix membrane are determined as the hot topics of this field. Further, China and USA are the main research hubs of this field. International Journal of Greenhouse Gas Control has been identified as the highest contributing journal, with 9.97% and 8.02% contribution in publications and citations, respectively. The bibliometric analysis reveals that 62.68% of the total articles indexed in Web of Science are published in the last five years. Keeping this in mind, the present study aims to quantitatively review the available literature on this technology that has been published during the period of 1970–2020, by applying bibliometric and content analysis techniques. Although many studies have also been conducted to review the state-of-the-art of CO2 capture technology, a quantitative review of the development of this field is still a novelty. Therefore, various materials have been employed to capture the released CO2. The CO2 emission, especially from the energy sector, has increased by 1.7% in recent years, which is an enormous increase. It was found that temperature positively influences the increase in permeability, while pressure influences permeability depending on the gas used, which is related to the effect of pressure on the solubility of the gas in the membrane. Tests were performed over a temperature range of 25–55☌ and a pressure range of 2–8 bar for N2, CH4, and CO2 gases. Membranes made of Pebax®2533 copolymer and containing additional fillers such as SiO2, ZIF−8, and POSS-Ph were investigated. This paper investigates the effects of temperature and feed pressure on the process properties of homogeneous and heterogeneous membranes. Using such membranes in a process involves subjecting them to varying temperatures and pressures. This is due to their potential to improve the process properties of membranes compared to those of homogeneous membranes, i.e., those made of polymer only. Heterogeneous membranes, otherwise known as Mixed Matrix Membranes (MMMs), which are used in gas separation processes, are the subject of growing interest.
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