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PhD project
PhD project
The role of nanoparticles and additives in carbon capture and sequestration.
The role of nanoparticles and additives in carbon capture and sequestration.
Indian Institute of Technology, Madras
Indian Institute of Technology, Madras
(a) Investigation of the role of nanotechnology-assisted additives in CO2 capture
1. Study of CO2 capture through nanotechnology supported solvents (Absorption strategy)
The development of “Chemogel” with higher heat capacity and absorption capacity using nanotechnology will resolve challenges associated with the current state of knowledge. Chemogels with higher heat capacity and lower mass transfer rates will foster overall absorption kinetics and help improve the grazing effect. The presence of nanoparticles in Chemogel will further enhance overall mixing and help lower the interfacial film thickness. The Chemogels can be utilized to harness kinetics of CO2 absorption in different contact strategies such as bubble column, packed column and microchannel. Thus, the successful adaption of Chemogels may help us achieve our goal of sustainability.
Development of new and innovative solvent (Chemogel) that have lower pH, high heat capacities and improved overall CO2 capture efficiency than the amines.
2. Investigation of solvent characteristics through physical and chemical analytical techniques.
3. Investigation of Chemogels in different contact strategies (packed bed, bubble column, microfluidics chips) for comparative performance evaluation with conventional amine solvent.
2. Study of CO2 capture through hydrates using nanoparticles and additives in laboratory settings
Investigation of different kinetics and thermodynamics promoters to develop effective CO2 hydrate formation strategy at industrial scale.
2. Investigation of synergistic effect of promoters and low-cost nanoparticles for overall improved rate of hydrate formation.
3. Investigation of different performance parameters that affect overall CO2 hydrate formation kinetics.
(b) Techno-economic study of large-scale CO2 sequestration potential using laboratory porous bed mimicking hydrate forming conditions in Indian Ocean subsea sedimentary basins
Study of different parameters that affect the overall sequestration rate in sub-sea sedimentary basins.
Analysis of CO2 sequestration potential of anthropogenic CO2 and effect of different surfactants mimicking subsea sedimentary conditions in the Indian Ocean.
Investigation of synergistic effect of nanoparticles and additives on the cumulative sequestration process at laboratory scale mimicking subsea basin conditions.
Figure 3 MOF as gas storage (Copyright 2014 International Union of Crystallography.)
Liquid-liquid flow through small diameter conduits – Enhanced Mass Transfer and Kinetic study.
Liquid-liquid flow through small diameter conduits – Enhanced Mass Transfer and Kinetic study.
Rajiv Gandhi Institute of Petroleum Technology, Jais.
Flow of two immiscible liquids through small diameters conduits finds vivid application in various mass transfer operations & industrial processes like solvent extraction, fast and instantaneous reactions, evaporation, and exothermic liquid-liquid reactions. Production of active pharmaceutical ingredients, biofuels, and biomedical devices is extensively utilizing small-diameter conduits. Small diameter conduits demonstrate their usefulness in industries such as pharmaceutical, biochemical, petroleum, and petrochemical industries, especially in the design of microtubular vaporizers (liquid-gas) for Steam Methane reforming and heat exchanger microreactors (liquid-liquid) for various chemical and biochemical operations. Systems with reduced dimensions not just intensify heat and mass transfer, but also increase the reaction rates. Various process intensification strategies have been previously utilized to enhance mass transfer and kinetics. Process intensification strategies like vibration, pulsation, and oscillatory baffle systems have been previously utilized but failed to overcome challenges due to cost intensiveness and limited mass transfer gain. The use of nanoparticles in small-diameter conduit systems has not been extensively tested. The higher interfacial surface area and micromixing could play an effective role in enhancing mass transfer through nanoparticle-assisted millichannels. There is a variety of literature about nanoparticles that enhance the heat transfer coefficient in liquid flow through the millimeter-sized conduit. Heat transfer operations are analogous to mass transfer operations in many ways. So study of nanoparticles enhanced mass transfer coefficient is an effective tool for process intensification.
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