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310 results on '"Deo, Milind"'

58. Deviations in Point of Zero Charge with Nanoscale Pore Geometries of Synthesized Silica-Based Materials

Author

Jacobson, Andrew, primary, Dewey, Janet, additional, Muraleedharan, Murali, additional, Chen, Chen, additional, van Duin, Adri, additional, Copeland, Grant, additional, Kaszuba, John, additional, Xia, Yiqing, additional, Sen, Sabyasachi, additional, Risbud, Subhash, additional, Cho, Hyeyoung, additional, Deo, Milind, additional, Bartl, Micheal, additional, and Butt, Darryl, additional

Published
2020
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63. Operational optimization of absorption column in capturing CO2 from flue gas in coal-fired power plant.

Author

Panja, Palash, Pack, Tyrell Xavier, and Deo, Milind

Subjects
COAL-fired power plants, FLUE gases, GAS power plants, ABSORPTION, OPERATING costs
Abstract

The solvent scrubbing method is one of the promising technologies to capture CO2 from flue gas. In this technology, CO2 is absorbed from flue gas using a liquid solvent in an absorption column and subsequently, solvent and CO2 are separated in a stripper column. The recovered solvent from the stripper unit is recycled to an absorption unit along with the makeup of the fresh solvent. Aqueous monoethanolamine (MEA) is widely used as the solvent in this method. The cost of solvent for continuous makeup in the absorber is one of the major operating costs. The goal of this study is to minimize the flow rate of the MEA stream to capture the specified amount of CO2 from flue gas to reduce the operating cost. Various scenarios are simulated in commercial process plant simulator by varying the CO2 loading in lean MEA stream and absorber height. Flue gas compositions are obtained from the Rocky Mountain Hunter Power Plant (coal-fired), Utah, USA. We have shown that more than 80% CO2 is captured using absorber heights of 25–40 m and CO2 loading in MEA of 0.2 and less using the minimum flow rate of MEA. An insignificant amount of MEA (<0.2%) is lost from the absorption and stripper units. Other than the purchasing cost of the solvent, operating costs related to pumping, cooling, handling, etc. can be significantly reduced using the method developed in this study. [ABSTRACT FROM AUTHOR]

Published
2021
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69. Moving boundary approach to forecast tight oil production.

Author

Velasco, Raul, Panja, Palash, and Deo, Milind

Subjects
PETROLEUM, PETROLEUM reservoirs, GAS flow, RESERVOIRS, LINEAR systems
Abstract

A novel semianalytical production predictive tool for tight reservoirs based on the application of material balance on a transient linear flow system is developed in this paper. This method considers two important regions during transient production of oil reservoirs: the saturated region where gas evolves and flows with oil, and the undersaturated region where only oil flows. A zonal moving boundary approach is used to evolve the two regions as the reservoir pressure gradually decreases. A semianalytical method is used to calculate pressures in the various regions and volumetric expansions. For both black oil and volatile oil scenarios, calculations from this analytical framework are able to match reservoir pressures, oil and gas rates, and cumulative gas–oil ratios determined using a reservoir simulator. The model was also applied to wells in tight reservoirs around the United States such as the Bakken (ND) and the Eagle Ford (TX) with reasonable success. [ABSTRACT FROM AUTHOR]

Published
2021
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70. Wormhole Generations in Indiana Limestone with CO2Intrusion: Numerical Simulations Based on Core Flooding Experiments

Author

Xiao, Ting, Kweon, Hyukmin, McPherson, Brian, and Deo, Milind

Abstract

In this paper, we examined possible impact factors for calcite dissolution and wormhole generation in limestone formations with CO2saturated brine intrusion by continuum-scale reactive transport simulations. Previous core-flood experiments that mimic near-wellbore region conditions of Geological CO2Storage (GCS) fields were used as verification cases. Simulation results reasonably reproduce the experimental results. The results suggest that the initial permeability distribution of the core and pre-existing large permeability zones along the core were key factors for wormhole generation. Porosity distribution also affects wormhole generation, but not significantly. According to our simulation results, CO2saturated brine injection rate, injection pattern, calcite dissolution rate, and permeability anisotropy do not significantly impact calcite dissolution and wormhole generation. The Damköhler (Da) numbers were 0.45–0.9 for the experiments at the core scale in this study, which are in accordance with the value for wormhole growth in previous studies. The numerical models would be applicable in further studies at core scale or a larger scale, and the findings that existing levels of high-permeability pathways help drive wormhole generation and the time scale over which the phenomenon occurs are directly applicable in a field injection scenario.

Published
2024
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