Abstract
The adoption of nanodoped membranes in the areas of gas stream separation, water, and wastewater treatments due to the physical and operational advantages of such membranes has significantly increased. The literature has shown that the surface structure and physicochemical properties of nanodoped membranes contribute significantly to the interaction and rejection characteristics when compared to bare membranes. This study reviews the recent developments on nanodoped membranes, and their hybrids for carbon capture and gas separation operations. Features such as the nanoparticles/materials and hybrids used for membrane doping and the effect of physicochemical properties and water vapour in nanodoped membrane performance for carbon capture are discussed. The highlights of this review show that nanodoped membrane is a facile modification technique which improves the membrane performance in most cases and holds a great potential for carbon capture. Membrane module design and material, thickness, structure, and configuration were identified as key factors that contribute directly, to nanodoped membrane performance. This study also affirms that the three core parameters satisfied before turning a microporous material into a membrane are as follows: high permeability and selectivity, ease of fabrication, and robust structure. From the findings, it is also observed that the application of smart models and knowledge-based systems have not been extensively studied in nanoparticle-/material-doped membranes. More studies are encouraged because technical improvements are needed in order to achieve high performance of carbon capture using nanodoped membranes, as well as improving their durability, permeability, and selectivity of the membrane.
Highlights
Carbon Capture BackgroundPrecombustion technology captures CO2 before the combustion process occurs resulting in cleaner fuel through the combustion process and eases the separation of CO2 after the operation; producing less CO2 emissions [7]
Academic Editor: Prem Kumar Seelam e adoption of nanodoped membranes in the areas of gas stream separation, water, and wastewater treatments due to the physical and operational advantages of such membranes has significantly increased. e literature has shown that the surface structure and physicochemical properties of nanodoped membranes contribute significantly to the interaction and rejection characteristics when compared to bare membranes. is study reviews the recent developments on nanodoped membranes, and their hybrids for carbon capture and gas separation operations
Features such as the nanoparticles/materials and hybrids used for membrane doping and the effect of physicochemical properties and water vapour in nanodoped membrane performance for carbon capture are discussed. e highlights of this review show that nanodoped membrane is a facile modification technique which improves the membrane performance in most cases and holds a great potential for carbon capture
Summary
Precombustion technology captures CO2 before the combustion process occurs resulting in cleaner fuel through the combustion process and eases the separation of CO2 after the operation; producing less CO2 emissions [7]. E technology of carbon dioxide capture after combustion is principally based on fluid absorption, solid adsorbent adsorption, and membrane separation [4]. E main limitation of separation after combustion by membrane technique is the need for very high selectivity for the extraction of relatively low CO2 concentrations from exhaust gases. Experimental synthesis of various nanoparticles has been proven to effectively capture carbon dioxide at high temperatures, and various nanocomposite materials have been used in membrane separation processes to optimize carbon capture efficiency. Several postcombustion CO2 exist, amongst which include absorption (which is the most widely used in oil and chemical industries and involves use of solvent to remove the CO2 from the flue gas) and membrane (involving physical or chemical interactions between membrane material and gases) [16]. Higher collection efficiency can be achieved, this will considerably require larger separation devices and more energy and cost. eoretically, oxyfuel combustion systems can capture most the CO2 produced. is capture technique needs additional gas treatment systems to remove nitrogen and sulfur pollutants [18]
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