Monolithic nanocarbon catalyst provides superior catalytic performance in H2S selective Oxidation, with enhanced sulfur selectivity and greater impurity tolerance. Credit to XU ChiIn petroleum refining and natural gas purification, ultra-deep removals of H2 S are important. However, industrial catalysts for continuous H2 S selective oxidation have poor activity and stability, particularly when using steam or impurities as feed gas.Assoc. Professor Liu Yuefeng's team from the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences, CAS, has created monolithic nanocarbon compounds for continuous removal of high levels of H2 S. These composites have superior product selectivity, stability, and resistance to high concentrations of O 2, CO 2 and steam.This article was published in ACS Catalysis, June 30, 2007.Nanocarbon materials have unique surface chemical properties, and exceptional catalytic performance. Overoxidation can occur due to the exothermic properties of the reaction and overactive sites.Researchers achieved high selectivity for sulfur in the selective oxidation H 2 S by using phosphate-modified 3D monolithic carbocatalysts (3D N-doped) without losing conversion, which led to a high rate of sulfur formation.P-modified N/C/CNT monolith showed high stability in severe reaction environments with O 2, CO 2 and steam, which indicates the potential for practical applications.The researchers combined advanced characterization methods (XPS and TPD), kinetic analysis, and theoretical calculation to find that the interaction of the P group with the pyridine site, which was also the active center, could influence the adsorption activity and activity of O 2 at the active site. This prevented over oxidation and improved the product's selectivity.Continue reading New single-atom catalyst boots reductive Amination reactionChi Xu et. al., Heteroatom Doped Monolithic Carbocatalysts With Improved Sulfur Selectivity And Impurity Tolerance For H2S Selective Oidation. ACS Catalysis (2021). Information from the Journal: ACS Catalysis Chi Xu et. al., Heteroatom Doped Monolithic Carbocatalysts With Improved Sulfur Selectivity And Impurity Tolerance For H2S Selective Oxidation. (2021). DOI: 10.1021/acscatal.1c01252.
