One-Pot Synthesis of Nano CuO-ZnO Modified Hydrochar Derived from Chitosan and Starch for the H2S Conversion

Abstract

A novel kind of hydrochar adsorbent, modified by CuO-ZnO and derived from chitosan or starch, was synthesized for H2S adsorption. The prepared adsorbent was characterized by BET, XRD, EDX, SEM, and XPS. The results showed that the modified hydrochar contained many amino groups as functional groups, and the nanometer metal oxide particles had good dispersion on the surface of the hydrochar. The maximum sulfur capacity reached 28.06 mg/g-adsorbent under the optimized conditions. The amine group significantly reduced the activation energy between H2S and CuO-ZnO conducive to the rapid diffusion of H2S among the lattices. Simultaneously, cationic polyacrylamide as a steric stabilizer could change the formation process of CuO and ZnO nanoparticles, which made the particle size smaller, enabling them to react with H2S sufficiently easily. This modified hydrochar derived from both chitosan and starch could be a promising adsorbent for H2S removal.

Catalysts and Processes for H2S Conversion to Sulfur

“…H 2 S adsorption was studied in relation to a novel kind of hydrochar adsorbent derived from chitosan or starch and modified by CuO-ZnO. Zang et al investigated the formation of CuO-ZnO on hydrochar, the effect of the hydrochar species, the adsorption temperature, and the adsorption mechanism [12]. A review concerning the different technologies of the gas-based phase for the direct catalytic oxidation of H 2 S to sulfur was the object of study by Khairulin et al [2].…”

Catalysts and Processes for H2S Conversion to Sulfur

“…The H 2 S adsorption was studied over a novel kind of hydrochar adsorbent derived from chitosan or starch and modified by CuO-ZnO. Zang et al, have investigated the formation of CuO-ZnO on hydrochar, the effect of the hydrochar species, the adsorption temperature and the adsorption mechanism [8].…”