Phan Minh Khoi1,2, Le Ngoc Thao1,2, Nguyen Thi Truc Phuong1,2, Ho Gia Quynh1,2, Nguyen Van Dung1,2, Ngo Tran Hoang Duong1,2, Lam Hoa Hung1,2, Dang Bao Trung1,2, and Nguyen Quang Long1,2This email address is being protected from spambots. You need JavaScript enabled to view it.
1Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam
2Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
Received: March 8, 2024 Accepted: June 4, 2024 Publication Date: August 3, 2024
Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.
Metal and bi-metal catalysts supported by ZSM-5 zeolite (Mn/ZSM-5, Mn-Ag/ZSM-5, and Mn-Cu/ZSM-5 ) were synthesized using a simple impregnation method. Various analytical techniques, including XRD, SEM, and EDS, were employed to evaluate the crystal structure, morphology, and elemental distribution of the materials. Subsequently, different catalysts were used to evaluate the adsorption capacity of isopropanol (IPA) as well as the regeneration efficiency using ozone in-situ. With an initial concentration of isopropanol gas of 2000ppmv, 0.5 g of catalyst, and a flow rate of 100 mL/min, Mn − Ag bimetal-supported zeolite showed the highest notable efficiency of the adsorption process of 89.06mg/g. Furthermore, the manganese metal-supported zeolite preserved approximately 60% and 70% of its ozone regeneration capacity during several consecutive cycles with a 1 L/min ozone flowrate and 10 - and 60 -minute O3 treatments, respectively. Additionally, the catalyst can increase efficiency up to 80% after four cycles when the ozone flowrate is doubled in 10 minutes. This innovative adsorption-regeneration method of gas treatment can benefit the environment by minimizing energy consumption, reducing the need for high-temperature treatments, and lowering overall energy requirements, potentially influencing the future development of metal and bi-metal catalysts for treating various volatile organic compounds.
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