Three-Dimensional Hierarchical Porous Sludge-Derived Carbon supported on Silicon Carbide Foams as Effective and Stable Fenton-Like Catalyst for Odorous Methyl Mercaptan Elimination

Publication date: Available online 25 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Jingling Yang, Qing Zhang, Feng Zhang, Dehua Xia, Huadan Liu, Shuanghong Tian, Lianpeng Sun, Dong Shu, Chun He, Sabiha RunaABSTRACTThe poor reusability of catalysts and secondary pollution are critical issues for sulfur-containing volatile organic compounds (S-VOCs) removal. In this paper, a three-dimensional (3D) hierarchical porous sludge-derived carbon supported on silicon carbide foams (SiC) has been fabricated for deep decomposition of S-VOCs under ambient conditions. The sludge-derived Fenton-like catalyst has been confirmed to be hierarchical 3D porous structure based on detailed characterization by scanning electron microscopy (SEM), X-ray diffraction (XRD), Nitrogen adsorption-desorption measurements and Raman spectroscopy. Significantly, the catalyst after KOH activation (SCFeK-SiC) shows excellent catalytic decomposition of methyl mercaptan (CH3SH) with almost complete CH3SH oxidation into sulfate using hydrogen peroxide as an oxidant under ambient conditions. This catalyst also possesses relative low iron dissolution and excellent cycling performance. The efficient catalytic ability of SCFeK-SiC can be attributed to SiC foam functioned as a stable 3D macroporous skeleton, in which the porous sludge-derived carbon immobilizes the active iron species and promotes the efficient capture of gaseous CH3SH, thus facilitating the decomposition of CH3SH by generating reactive sp...

Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research