A hydrostable cage-based MOF with open metal sites and Lewis basic sites immobilized in the pore surface for efficient separation and purification of natural gas and C2H2

2020 ◽  
Vol 49 (11) ◽  
pp. 3553-3561 ◽  
Author(s):  
Zhenzhen Jiang ◽  
Ying Zou ◽  
Tingting Xu ◽  
Lihui Fan ◽  
Ping Zhou ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Separation ◽  
Hydrolytic Stability ◽  
Pore Surface ◽  
Separation And Purification ◽  
Basic Sites ◽  
Efficient Separation ◽  
Open Metal Sites

A cage-based MOF displays excellent hydrolytic stability as well as promising potential for diverse gas separation applications.

scholarly journals Multi-Component Separation and Purification of Natural Gas

2018 ◽  
Author(s):  
David Tamburello ◽  
Bruce Hardy ◽  
Martin Sulic
Keyword(s):  
Natural Gas ◽  
Gas Separation ◽  
Real World ◽  
Activated Carbons ◽  
Research Effort ◽  
Landfill Gas ◽  
Separation And Purification ◽  
Technical Developments ◽  
Computational Screening ◽  
Gas Volume

Over the past decade, several technical developments (such as hydraulic fracturing) have led to an exponential increase in discovering new domestic natural gas reserves. Raw natural gas composition can vary substantially from source to source. Typically, methane accounts for 75% to 95% of the total gas, with the rest of the gas containing ethane, propane, butane, other higher hydrocarbons, and impurities, with the most common including H2O, CO2, N2, and H2S. All natural gas requires some treatment, if only to remove H2O; however, the composition of natural gas delivered to the commercial pipeline grids is tightly controlled. Sub-quality natural gas reserves, which are defined as fields containing more than 2% CO2, 4% N2, or 4 ppm H2S, make up nearly half of the world’s natural gas volume. The development of sub-quality, remote, and unconventional fields (i.e. landfill gas) can present new challenges to gas separation and purification methods. Adsorbent technologies, such as the use of activated carbons, zeolites, or metal-organic frameworks (MOFs), may hold the key to more efficient and economically viable separation methods. This work proposes to prove the applicability of the multi-component potential theory of adsorption (MPTA) to a real world natural gas adsorbent system to properly characterize the adsorbent’s selectivity for an individual gas component using only the single component isotherms. Thus, the real-world gas separation/purification application of a specific adsorbent for a given gas stream can be obtained simply and effectively without the need for large experimental efforts or costly system modifications until after an initial computational screening of perspective materials has been completed. While the current research effort will use natural gas, which is the world’s largest industrial gas separations application, to validate the MPTA, the tools gained through this effort can be applied to other gas separation effort.

Xenon recovery from natural gas by hybrid method based on gas hydrate crystallisation and membrane gas separation

2021 ◽  
Vol 86 ◽  
pp. 103740
Author(s):  
Maria S. Sergeeva ◽  
Nikita A. Mokhnachev ◽  
Dmitry N. Shablykin ◽  
Andrey V. Vorotyntsev ◽  
Dmitriy M. Zarubin ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Separation ◽  
Hybrid Method ◽  
Gas Hydrate ◽  
Membrane Gas Separation

CFD Investigation of Downhole Natural Gas Separation Efficiency in the Churn Flow Regime

2021 ◽  
Author(s):  
Charles Okafor ◽  
Patrick Verdin ◽  
Phill Hart
Keyword(s):  
Natural Gas ◽  
Flow Regime ◽  
Gas Separation ◽  
Separation Efficiency ◽  
Operating Conditions ◽  
Analytical Models ◽  
Design Stage ◽  
Average Error ◽  
Multiphase Model ◽  
Churn Flow

Abstract Downhole Natural Gas Separation Efficiency (NGSE) is flow regime dependent, and current analytical models in certain conditions lack accuracy. Downhole NGSE was investigated through 3D Computational Fluid Dynamics (CFD) transient simulations for pumping wells in the Churn flow regime. The Volume of Fluid (VOF) multiphase model was considered along with the k – ε turbulence model for most simulations. A mesh independence study was performed, and the final model results validated against experimental data, showing an average error of less than 6 %. Numerical simulation results showed that the steady state assumption used by current mathematical models for churn flow can be inaccurate. Several key parameters affecting the NGSE were identified, and suggestions for key improvements to the widely used mathematical formulations for viscous flow provided. Sensitivity studies were conducted on fluid/geometric parameters and operating conditions, to gain a better understanding of the influence of each parameter on NGSE. These are important results as they equip the ESP engineer with additional knowledge to maximise the NGSE from design stage to pumping operations.

Molecularly Engineered 6FDA‐Based Polyimide Membranes for Sour Natural Gas Separation

2020 ◽  
Vol 59 (35) ◽  
pp. 14877-14883 ◽  
Author(s):  
Zhongyun Liu ◽  
Yang Liu ◽  
Wulin Qiu ◽  
William J. Koros
Keyword(s):  
Natural Gas ◽  
Gas Separation ◽  
Polyimide Membranes

Post-synthetic modification of CARDO-based materials: application in sour natural gas separation

2020 ◽  
Vol 8 (44) ◽  
pp. 23354-23367
Author(s):  
Ali Hayek ◽  
Abdulkarim Alsamah ◽  
Garba O. Yahaya ◽  
Eyad A. Qasem ◽  
Rashed H. Alhajry
Keyword(s):  
Natural Gas ◽  
Chemical Modification ◽  
Free Volume ◽  
Gas Separation ◽  
Polymeric Membrane ◽  
Fractional Free Volume ◽  
Gas Molecule

Chemical modification enhances gas molecule permeation through polymeric membrane matrices by increasing the fractional free volume.

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