Abstract
ABSTRACT This paper presents the catalytic decomposition of CS2 using dielectric barrier discharge plasma coupled with novel limonite or siderite supported BiVO4 composite material (limonite/BiVO4 or siderite/BiVO4) prepared via a hydrothermal method. The crystalline structure, surface morphology, gas adsorption properties, and surface chemistry of the catalysts are characterized. The results show that BiVO4 supported on the limonite or siderite is highly dispersible, which increases its active site. In addition, CS2 decomposition efficiencies obtained using catalysts fabricated with various Fe/Bi ratios and calcination temperatures are experimentally evaluated. The result show that the maximum CS2 decomposition efficiencies are obtained using catalysts calcined at 350°C with limonite/BiVO4 and siderite/BiVO4 mass ratios of 3:7, which respectively yield CS2 decomposition efficiencies are 11.9% and 13.2% greater than that obtained with dielectric barrier discharge treatment alone. The differences in the CS2 decomposition efficiencies of the two types of supported catalysts may be due to the chemical and physical differences between limonite and siderite, including the oxidation states of iron and the surface morphology of the iron ores.
Highlights
Carbon disulfide (CS2) is an odorous sulfur compound that has been widely used as important feedstock in the rubber, metallurgy, and viscose fiber industries
The present study presents the catalytic decomposition of CS2 using dielectric barrier discharge (DBD) plasma coupled with novel limonite (main component: FeO(OH)) and siderite supported BiVO4 composite catalysts prepared via a hydrothermal method
X-ray diffraction (XRD) Analysis The XRD patterns of limonite/BiVO4 and siderite/BiVO4 composite catalysts calcined at 350°C with different limonite/BiVO4 and siderite/BiVO4 mass ratios are shown in Figs. 2(a) and 2(b), respectively
Summary
Carbon disulfide (CS2) is an odorous sulfur compound that has been widely used as important feedstock in the rubber, metallurgy, and viscose fiber industries. Common methods of treating CS2 emissions include adsorption, liquid absorption, condensation, thermo-decomposition, and plasma-based decomposition (Rojo et al, 2010; Pham et al, 2016; Laing et al, 2017). BiVO4 is a new type of photocatalyst that possesses a narrow band gap, good visible light absorption, and stable photo-corrosion resistance (Singh et al, 2016). BiVO4 can be converted between three different crystal phases, including tetragonal zircon (z-t), monoclinic scheelite (s-m), and tetragonal scheelite (s-t). The z-t and s-m phases of BiVO4 possess band gaps of 2.9 eV and 2.4 eV, respectively. The z-t phase of BiVO4 exhibits optical absorption bands in the ultraviolet (UV) region, while the s-m
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
