Alexey P. Suknev

Isotope exchange between NO and H2O on a platinum-containing catalyst based on fiberglass

The dynamics of 18O isotope exchange between NO or H2O and a catalyst and the dynamics of 18O label transfer from NO to H2O have been studied under conditions of sorption-desorption equilibrium. The occurrence of a reaction of oxygen exchange between NO and water sorbed in the bulk of the catalyst was detected. This reaction occurs at platinum sites with the participation of acid sites of the glass matrix. The rate constants of the reaction of NO with platinum sites and the diffusion coefficients of water in the bulk of the glass matrix are evaluated.

Silicate fiberglass catalysts: From science to technology

Efficient methods for the confining of highly dispersed Pd and Pt particles 1–1.5 nm in size in the subsurface layers of silicate glass fibers at depths of 10–20 nm are developed. Fiberglass catalysts reveal high activity in the selective hydrogenation of acetylene and the deep oxidation of hydrocarbons despite their low metal contents (0.01–0.02 wt %). The monometallic Pd/FG catalyst thus exhibits higher C2H2 hydrogenation selectivity at high acetylene conversion (99%+) in comparison to the commercial bimetallic Pd–Ag catalyst, and the activity of the Pt/FG catalyst in the deep oxidation of organic and chlororganic compounds, including dioxins, is found to be higher than that of the commercial AP-56 (Pt/Al2O3) catalyst. The efficiency of Pt/FG has successfully been demonstrated in the removal volatile organic compounds (VOC) from Monomer plant of PJSC Nizhnekamskneftekhim for more than four years of continuous operation.