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Study on the Impact of Porous Media on Condensate Gas Depletion: A Case Study of Reservoir in Xihu Sag.
ACS Omega
October 2024
National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China.
During the depletion and pressure reduction process in condensate gas reservoirs, the precipitation of condensate oil transforms the single-phase gas flow into a two-phase gas-liquid flow, significantly reducing the permeability. Currently, microscopic studies of the phase behavior of condensate gas in porous media mainly focus on observing and describing the occurrence of condensate oil, lacking quantitative calculations and direct observations of condensate oil throughout the entire depletion cycle. This paper uses a microvisualization method to simulate the depletion process of condensate gas reservoirs.
View Article and Find Full Text PDFAdditively manufactured, long, serpentine submillimeter channels by combining binder jet printing and liquid-phase sintering.
Sci Rep
July 2024
Code 6354, Materials Science and Technology Division, Naval Research Laboratory, Washington, DC, 20375, USA.
Metallic microfluidic devices made from powder-bed additive manufacturing systems have received increasing attention, but their feasible channel geometry and complexity are often limited by lack of an effective approach to removing trapped powder particles within the channels or conduits of the sintered parts. Here, we present an innovative approach to fabricating long serpentine, high-aspect-ratio submillimeter channels made of stainless steel 316L (SS) by binder jet printing (BJP) and liquid-phase sintering. We leverage the unique nature of the BJP process, that is printing and consolidation steps are decoupled, enabling us to join two or more parts during the sintering step.
View Article and Find Full Text PDFDevelopment of a direct PMMA-PCB bonding method for low cost and rapid prototyping of microfluidic-based gas analysers.
RSC Adv
July 2024
Department of Electrical and Computer Engineering, Isfahan University of Technology Isfahan 84156-83111 Iran
Rapid prototyping of microfluidic devices requires low cost materials and simple fabrication methods. PMMA and PCB have been used separately for the fabrication of microfluidic devices in a wide range of applications. Although the combined use of PMMA and PCB can have considerable merits, few works have been reported on the direct bonding of these materials.
View Article and Find Full Text PDFIn-Situ Gas Permeation-Driven Ionic Current Rectification of Heterogeneously Charged Nanopore Arrays.
Small
October 2024
Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, 44919, Republic of Korea.
Ionic diodes provide ionic current rectification (ICR), which is useful for micro-/nanofluidic devices for ionic current-mediated applications. However, the modulation of ICR is not fully developed, and current challenges include limited active control and localized modulation for further multiplexing of micro-/nanofluidic ionic diodes. Herein, a microfluidic device integrated with particle-assembly-based ionic diodes (PAIDs) and a gas-flow channel above them is presented.
View Article and Find Full Text PDFQuantifying mass transport limitations in a microfluidic CO electrolyzer with a gas diffusion cathode.
Commun Chem
March 2024
Laboratory of Renewable Energy Science and Engineering, EPFL, Station 9, Lausanne, 1015, Switzerland.
A gas diffusion electrode (GDE) based CO electrolyzer shows enhanced CO transport to the catalyst surface, significantly increasing current density compared to traditional planar immersed electrodes. A two-dimensional model for the cathode side of a microfluidic CO to CO electrolysis device with a GDE is developed. The model, validated against experimental data, examines key operational parameters and electrode materials.
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