A high-efficiency Pebax® 1657-based mixed matrix membrane containing molybdenum oxide particles for enhanced CO2/N2 separation

IF 3 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES International Journal of Environmental Science and Technology Pub Date : 2025-02-26 DOI:10.1007/s13762-025-06391-8

A. Hosseinkhani, P. Safari, M. Omidkhah, A. Ebadi Amooghin, A. M. Norouzi

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Abstract

Membrane-based gas separation technology offers significant advantages compared to conventional processes. To enhance membrane performance, the incorporation of nanoparticles into the polymer matrix to fabricate mixed matrix membranes (MMMs) plays a pivotal role in the advancement of membrane-based gas separation technology. In this study, molybdenum oxide (MoO₃) nanoparticles were incorporated into Pebax^® 1657 MMMs for CO₂ separation. The size distribution of nanoparticles was characterized using dynamic light scattering. Scanning electron microscope was used to ensure the even distribution of MoO₃ nanoparticles within the polymer matrix, and all prepared membranes’ crystallinity was under scrutiny by X-ray diffraction and differential scanning calorimetry. Also, by employing Fourier-transform infrared spectroscopy, the Pebax^® 1657-MoO₃ MMMs were confirmed to be properly fabricated. It appears that MoO₃ nanoparticles are attracted to both soft and rigid Pebax^® segments by hydrogen bonds, contributing to favorable interfacial adhesion. Gas separation tests demonstrated that the Pebax^® membrane incorporating 3 wt% MoO₃ delivered the highest CO₂ permeability of 209.5 barrer and the superior CO₂/N₂ selectivity of 245 at 10 bar and 35 ℃. Finally, CO₂ permeability and CO₂/N₂ selectivity were improved by 73.43 and 217.9% compared to the pure Pebax^® membrane.

Graphical Abstract

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来源期刊

International Journal of Environmental Science and Technology 环境科学-环境科学

CiteScore

5.60

自引率

6.50%

发文量

806

审稿时长

10.8 months

期刊介绍： International Journal of Environmental Science and Technology (IJEST) is an international scholarly refereed research journal which aims to promote the theory and practice of environmental science and technology, innovation, engineering and management. A broad outline of the journal''s scope includes: peer reviewed original research articles, case and technical reports, reviews and analyses papers, short communications and notes to the editor, in interdisciplinary information on the practice and status of research in environmental science and technology, both natural and man made. The main aspects of research areas include, but are not exclusive to; environmental chemistry and biology, environments pollution control and abatement technology, transport and fate of pollutants in the environment, concentrations and dispersion of wastes in air, water, and soil, point and non-point sources pollution, heavy metals and organic compounds in the environment, atmospheric pollutants and trace gases, solid and hazardous waste management; soil biodegradation and bioremediation of contaminated sites; environmental impact assessment, industrial ecology, ecological and human risk assessment; improved energy management and auditing efficiency and environmental standards and criteria.