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An Efficient Strategy to Boost the Removal Efficiency for Submicron Particles and VOCs of Polypropylene in the Complex Flue Gas

Year: 2025

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide Particulate matter (PM) is recognized as a significant environmental risk factor, with profound adverse effects on human health. The development of air filters that maintain high performance under complex environmental conditions remains a challenge. Herein, a novel composite air filter was fabricated by the in situ growth of ZIF-8 nanoparticles onto polypropylene (PP) fibers in this study, aiming to enhance filtration efficiency and adaptability in challenging environments. The results demonstrated that the PP/ZIF-8 membrane contained a substantial number of rhombic dodecahedron crystals. The removal efficiencies could be obtained at 84.6%, 92.6%, 93.5%, 95.8%, and 96.9% for PM 0.5, PM 1.0, PM 2.5, PM 5.0, and PM 10, respectively. The pressure drop decreased from 0.19 to 0.07 kPa. The filtration efficiency of PM 0.5 for PP/ZIF-8 remained as high as 80% after 50 filtration cycles. VOCs containing nitrogen and carbon elements were removed preferentially for PP/ZIF-8, while oxygen-containing compounds may be competitively suppressed from complex flue gas. The adsorption capacity of PP/ZIF-8 for benzene VOCs was higher than that of PP, and the actual adsorption process for benzene could be better described by the pseudo-first-order kinetic model. Additionally, the concentrations of fulvic acid substances and high-molecular-weight humic substances were significantly decreased in the exhaust gas. Electrostatic interaction and chemisorption contributed significantly to PM and VOCs removal. This study proposes a novel strategy to boost the removal efficiency and adaptability of the air filter in complex environmental conditions with low pressure drop.

Source: ACS Omega

DOI: 10.1021/acsomega.5c07926

Authors: Jincheng Li, Siqi Wang, Hao Lu, Mingdeng Xiang, Yunjiang Yu

Institutions: Chang'an University, Ministry of Ecology and Environment, South China Institute Of Environmental Sciences, Shanghai Jiao Tong University

Language: English

Topic: Aerosol Filtration and Electrostatic Precipitation

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Responsible consumption and production, Clean water and sanitation

Open Access status: gold

Estimated APC paid: $1,935