Sulfur Dioxide Removal from Flue Gas by Supported CuO Nanoparticle Adsorbents

Abstract

The development of adsorbents for gas desulfurization is highly essential to control sulfur dioxide emissions. In this article, CuO-modified SBA-15 and MOR-SBA-15 composite adsorbents were prepared by impregnation and post-grafting methods. As-prepared adsorbents were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, Fourier transform infrared spectroscopy, transmission electron microscopy, and N2 adsorption–desorption methods. Furthermore, the adsorption desulfurization efficiency was investigated. The results proved that the impregnation method exhibited a remarkable dominance compared to the grafting method. The 8.7% CuO/MOR-SBA-15-imp adsorbent showed superior performance compared with other adsorbents in removing SO2 from the flue gas. Moreover, the 8.7%CuO/MOR-SBA-15-imp adsorbent illustrated an excellent regeneration for five cycles. The optimal condition for the flue gas desulfurization with the flow rate of 13 NL/h was 400 °C and a 200 mg adsorbent. Kinetic model studies showed that the model was pseudo-first order, and the amounts of activation energy for the 8.7% CuO/SBA-15-imp and 8.7% CuO/MOR-SBA-15-imp samples were 20.4 and 18.5 kJ/mol, respectively.

Highly Selective and Reversible Detection of Simulated Breath Hydrogen Sulfide Using Fe‐Doped CuO Hollow Spheres: Enhanced Surface Redox Reaction by Multi‐Valent Catalysts

“…This is because of the sluggish kinetics of H 2 S desorption due to the strong interaction between CuO and H 2 S or the low reoxidation rate of CuSO 4 formed by the adsorption reaction. [23][24][25] Thus, enhancing the reversibility of CuO-based H 2 S gas sensors, which is very important for breath analysis, remains a challenging issue and requires a breakthrough.…”

Quantitative Fluorescent Lateral Flow Strip Sensor for Myocardial Infarction Using Purity-Color Upconversion Nanoparticles

“…Ln 3+ ion doping and host selection have a great influence on red UCL. − Because the matrix lattice greatly affects the spatial relationship between the dopant ions, phonon energy, and crystal field. The right host materials is crucial to building UCNPs with desirable luminescence properties. − Copper oxide (CuO) has superior stability, lower band gap, and low phonon energy, which is a promising oxide luminescent host. − Ln 3+ -doped CuO (Ln/CuO) UCNPs improve the photoelectric performance. Ln/CuO can slow the rate of recombination by producing localized defect states close to the valence band maximum or conduction band minimum (or both), which can trap the electrons produced.…”

Preparation of ternary polyaniline@CuO−zeolite composite, discussion of characteristics, properties and their applications in supercapacitors and cationic dye adsorption

“…28 These main characteristics have many advantages for CuO over other metal oxides, and so they are utilized in several areas such as bio-sensors, 29 photodetectors, 30 nanofluids, 31 gas sensors, 32 photocatalysis, 33 field emission properties 34 and removal of inorganic pollutants. 35,36 Moreover, they can be facilely blended with polymer and other matrices, which can be synthesized with different surface morphologies. 28 Supercapacitors (SCs), which are novel creations of energy storage and conversion devices, are gaining significance due to the consumption of electricity.…”

“…They have excellent electrical characteristics and reduced thermal emittance 28 . These main characteristics have many advantages for CuO over other metal oxides, and so they are utilized in several areas such as bio‐sensors, 29 photodetectors, 30 nanofluids, 31 gas sensors, 32 photocatalysis, 33 field emission properties 34 and removal of inorganic pollutants 35,36 . Moreover, they can be facilely blended with polymer and other matrices, which can be synthesized with different surface morphologies 28 …”