Insights into the Adsorptive Separation of Ethylene/Ethane in LTA-Type Zeolites DOI Creative Commons
Xiaohui Zhao, Shixue Zhou,

Magdy Abdelghany Elsayed

и другие.

Separations, Год журнала: 2025, Номер 12(6), С. 146 - 146

Опубликована: Июнь 1, 2025

Understanding the competitive adsorption mechanism is essential for development of adsorptive separation ethylene (C2H4) and ethane (C2H6). In this work, density functional theory calculations molecular dynamics simulations were employed to investigate C2H4 C2H6 in two LTA-type zeolites, ITQ-29 5A. The results show that energies gas molecules zeolite 5A are more negative than ITQ-29, difference energy between significantly larger 13.3 versus 6.2 kJ/mol. Zeolite demonstrates high C2H4/C2H6 ideal selectivity (43.5 at 5 ns) while exhibiting slow uptake efficiency due small pore windows, hindering diffusion (1.05 × 10−10 m2/s 298 K). contrast, facilitates faster (3.25 10−9 K) exhibits a modest 1.11 ns single-gas 2.72 equimolar binary mixture adsorption. To enhance selectivity, methyl phosphonic acid introduced onto add sieving layer enables preferentially permeate, optimal coverage 50%, yielding 17.5 preserving efficiency. insights into coating inside zeolites provide theoretical basis rational design high-performance adsorbents.

Язык: Английский

Progress of Oxygen Generation Technologies in High‐Altitude and Emergency Rescue Conditions DOI

Shijie Gao,

Zhenxing Song, Hongyun Sun

и другие.

Asia-Pacific Journal of Chemical Engineering, Год журнала: 2025, Номер unknown

Опубликована: Май 26, 2025

ABSTRACT Oxygen plays a crucial role in the prevention and treatment of acute altitude sickness, as well emergency rescue. To provide timely adequate oxygen to patients, on‐site generation is an effective solution. Currently, there are various methods with distinct characteristics suitable for different scenarios. Understanding principles, features, recent advancements these essential enhancing efficiency production. This article reviews several primary techniques, including cryogenic distillation, pressure swing adsorption, membrane separation, chlorate decomposition, decomposition superoxide, water electrolysis. Each method discussed terms its underlying characteristics, latest research developments, emphasis on their applications prevention, treatment, response sickness. review aims guide development technologies tailored diverse environments.

Язык: Английский

Процитировано

0
Insights into the Adsorptive Separation of Ethylene/Ethane in LTA-Type Zeolites DOI Creative Commons
Xiaohui Zhao, Shixue Zhou,

Magdy Abdelghany Elsayed

и другие.

Separations, Год журнала: 2025, Номер 12(6), С. 146 - 146

Опубликована: Июнь 1, 2025

Understanding the competitive adsorption mechanism is essential for development of adsorptive separation ethylene (C2H4) and ethane (C2H6). In this work, density functional theory calculations molecular dynamics simulations were employed to investigate C2H4 C2H6 in two LTA-type zeolites, ITQ-29 5A. The results show that energies gas molecules zeolite 5A are more negative than ITQ-29, difference energy between significantly larger 13.3 versus 6.2 kJ/mol. Zeolite demonstrates high C2H4/C2H6 ideal selectivity (43.5 at 5 ns) while exhibiting slow uptake efficiency due small pore windows, hindering diffusion (1.05 × 10−10 m2/s 298 K). contrast, facilitates faster (3.25 10−9 K) exhibits a modest 1.11 ns single-gas 2.72 equimolar binary mixture adsorption. To enhance selectivity, methyl phosphonic acid introduced onto add sieving layer enables preferentially permeate, optimal coverage 50%, yielding 17.5 preserving efficiency. insights into coating inside zeolites provide theoretical basis rational design high-performance adsorbents.

Язык: Английский

Процитировано

0