Catalytic Incineration of Acetone on Mesoporous Silica Supported Metal Oxides Prepared by One-Step Aerosol Method

Abstract

Mesoporous silica supported metal oxide catalysts were synthesized by a one-step fast aerosol process based on an evaporation induced self-assembly (EISA) method. They were then applied to the catalytic incineration of VOCs with acetone as the target species. The synthesized metal-MSPs (mesoporous silica particles) were characterized by N 2 adsorption-desorption measurements, X-ray diffraction (XRD), transmission electron microscopy (TEM), and inductively coupled plasma-mass spectrometer (ICP-MS) to understand their physical and chemical properties. Tests on various metals of Ce, Mn, Cu, Fe, and Al supported on MSPs over a temperature range of 150-350°C demonstrated that Ce is the best metal for the catalytic incineration of acetone. The Ce-MSPs(10) has a high Ce loading of 9.76 wt %, but its small specific surface area of 615 m 2 /g, poor pore size distribution, and less-ordered pore structure resulted in a relatively lower acetone removal as compared to the Ce-MSPs(25). The Ce-MSPs(25) catalyst appeared to be the best acetone catalytic incineration performance due to the high specific surface area of 951 m 2 /g with highly ordered pore structure as well as optimal Ce metal content of 3.72 wt % so that CeO 2 particles were well dispersed on the porous surfaces. Near complete acetone destruction via Ce-MSPs(25) catalyst was achieved at a temperature of 250°C, acetone inlet concentration of 1000 ppmv and GHSV of 5000 h -1 . The long-term stability test showed that the acetone destruction efficiency can be kept constant during the 96 h test period.

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

“…Acetone is a common organic solvent which has been widely used in many industries such as plastics, drugs, semiconductors, printed circuit boards, electronic terminal products, varnishes, and adhesives. ,− Acetone can cause environmental hazards and is harmful to human health. , The catalytic oxidation of acetone is therefore an important subject of research, with work generally focusing on catalysts based on transition metal oxides (e.g., Cu, Mn, V, and Ce).…”

Catalytic oxidation of acetone over CuCeOx nanofibers prepared by an electrospinning method

“…Furthermore, increasing copper content diminishes the catalytic activity of nanobers. 38 According to the characteristic and catalytic performance results, the high activity of nanober catalysts can be attributed to the synergistic effect of specic nanobrous morphology and Morphology characterization illustrated that the CuCeO x nanober catalysts possess one-dimensional nanobrous morphology with a large specic surface area. As is well known, nanobrous morphology favors the catalytic reaction because it can provide a large specic surface area 33 and prevent the inhibition of the mass-transfer process, 34 i.e.…”

Ceria‐Containing Ordered Mesoporous Silica: Synthesis, Properties, and Applications

“…The role of Ce‐based materials in the removal of volatile organic compounds (VOCs) that have been emitted from many industrial processes via redox reactions is a burning research topic in the modern scientific world . As a result of the exceptional oxygen storage capacity (OSC) of the ceria particles and the high thermal stability of the ceria–silica frameworks, nanoporous ceria–silica composites have been widely used in three‐way catalytic (TWC) converters to exhaust various toxic gases, such as H 2 , CO, NO x , hydrocarbons etc .…”

“…A highly‐selective formation of propylene and an increasing conversion of propane were observed as the temperature increased. The catalytic incineration of acetone is offered according to the high surface area of the mesoporous silica particle supported by the CeO 2 catalyst . An almost complete destruction of the acetone through thermal oxidation mediated by the CeO 2 ‐silica catalyst was achieved near a temperature of 523 K, and the incineration process could be kept constant during the 96 h investigation period, which indicates that ceria–silica has a high efficiency for acetone destruction.…”