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ADSORPTION AND DISPLACEMENT OF METHANE IN GRAPHENE-BASED MICROSTRUCTURES: INSIGHT FROM MOLECULAR SIMULATIONS

Bekeshov, Dias; Ashimov, Sultan; Wang, Yanwei; Wang, Lei (National Laboratory Astana, 2022-08)

Shale gas and coalbed methane are alternative energy sources that partly or even mainly consist of methane stored in an adsorbed state in pores of organic-rich rock and coal seams. This study employed a combination of Grand ...
ADVANCES IN SOUR GAS INJECTION FOR ENHANCED OIL RECOVERY-AN ECONOMICAL AND ENVIRONMENTAL WAY FOR HANDLING EXCESSIVELY PRODUCED H2S

Koyanbayev, Madiyar; Wang, Lei; Wang, Yanwei; Hashmet, Muhammad Rehan (Energy Reports, 2022)

Proper handling of produced sour gas is a big challenge for operating companies due to the serious environmental and technical problems caused by H2S. Among various sour gas processing methods, reinjection into reservoirs ...
BINDING AND DEGRADATION REACTION OF HYDROXIDE IONS WITH SEVERAL QUATERNARY AMMONIUM HEAD GROUPS OF ANION EXCHANGE MEMBRANES INVESTIGATED BY THE DFT METHOD

Karibayev, Mirat; Myrzakhmetov, Bauyrzhan; Kalybekkyzy, Sandugash; Wang, Yanwei; Mentbayeva, Almagul (Molecules, 2022)

Commercialization of anion exchange membrane fuel cells (AEMFCs) has been limited due to the chemical degradation of various quaternary ammonium (QA) head groups, which af fects the transportation of hydroxide (OH−) ions ...
BINDING, REACTION, AND ACTIVATION ENERGIES OF OH- IONS INTERACTING AND REACTING TO SOME HEAD GROUPS OF ANION EXCHANGE MEMBRANE EXPLORED VIA THE DFT METHOD

Karibayev, Mirat; Myrzakhmetov, Bauyrzhan; Kalybekkyzy, Sandugash; Mentbayeva, Almagul; Wang, Yanwei (National Laboratory Astana, 2022-08)

The main drawback of Anion Exchange Membranes is related to the chemical instability of cationic head groups and the transportation of hydroxide ions at alkaline conditions and elevated temperatures. At this stage, our ...
DEVELOPMENT OF QUATERNIZED CHITOSAN INTEGRATED WITH NANOFIBROUS POLYACRYLONITRILE MAT AS AN ANION-EXCHANGE MEMBRANE

Akhmetova, Aktilek; Myrzakhmetov, Bauyrzhan; Wang, Yanwei; Bakenov, Zhumabay; Mentbayeva, Almagul (ACS Omega, 2022)

two-phase anion-exchange membrane was prepared from quaternized chitosan (QCS) integrated with an electrospun polyacrylonitrile (PAN) scaffold by spin coating. To synthesize QCS, glycidyltrimethylammonium chloride in ...
DIFFERENTIAL EQUATIONS & LINEAR ALGEBRA WITH WOLFRAM MATHEMATICA

Zhaidarbek, Balnur; Tleubek, Aruzhan; Wang, Yanwei (Nazarbayev University School of Engineering and Digital Sciences, 2022-08)

This book is written primarily for students enrolled in the course "Engineering Mathematics III (Differential Equations and Linear Algebra)" (ENG200) at Nazarbayev University. ENG200 is a compulsory course offered to all ...
A NOVEL METHOD FOR THE DETERMINATION OF THE LATERAL DIMENSIONS OF 2D RECTANGULAR FLAKES

Papathanasiou, Thanasis D.; Tsiantis, Andreas; Wang, Yanwei (Materials, 2022)

We present a novel method for the determination of the lateral dimensions of thin rectangular flakes, as they exist randomly dispersed in flake composites. Knowledge of flake size and shape is essential for the correct ...